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Offline TexasRedNeck

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #50 on: September 05, 2019, 05:31:46 PM »
Phone in an air strike. 


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Offline dave945

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #51 on: September 05, 2019, 07:23:10 PM »
Everybody loves the Air Force when it’s time for the big booms!


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Offline Flyin6

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #52 on: September 07, 2019, 09:28:11 AM »
Everybody loves the Air Force when it’s time for the big booms!


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YES we do!
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Offline Flyin6

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #53 on: September 10, 2019, 08:50:36 AM »
Just got this from Justin:

Hi Don,

I can understand why it would feel a bit weak to you, as you don't have the tune installed right now.  This is still the stock tune.  When you flash in the modified tune, you must only flash the 91+OctTune file.  Do not then flash the StockTune after it, as that will revert it to factory settings.

Two evident points to that are the fact that you are shifting 600rpm lower than the tune calls for at nearly full throttle and it is not entering its power enrichment mode above 75% throttle like it is programmed to do.

Justin
BlackBearPerformance.com


That's good to know! So, I suspect the modified tune is coming pdq!

Yippee!
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Offline dave945

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #54 on: September 10, 2019, 01:48:02 PM »
Nice, can’t wait to hear how much get up and go you get out of that engine. I’m considering an LQ4 swap for the blazer and your mods would provide a good roadmap.


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Offline Flyin6

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #55 on: September 10, 2019, 03:25:17 PM »
So, just got the tune in and loaded it

Huge difference!!!

Still have to solve the fan issue, but oddly enough the AC fan runs, the idle is around 700 RPM, great firm shifts and a lot more power. And low RPM power too, although a whole different animal than the D-Max. (Read: WAAAY LESS POWER)

The way it is I'd say it is totally usable and a good place to start from

Plan will be to sort the fan, then just start using it. Later on, winterish maybe, add a turbocharger and settle with whatever that yields as a finished powertrain system.

4.88 gears and 35" tires are spot on perfect. Don't know why I was apprehensive with it. Second time I had a street vehicle with 4.88's. Tate suggested the first time and he was correct then too.
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Offline JR

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #56 on: September 10, 2019, 03:58:45 PM »
Glad to hear it is running better. Just get a temp switch for the fans and be done!
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Offline TexasRedNeck

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #57 on: September 10, 2019, 05:27:21 PM »
Glad to hear Don.

May I suggest a supercharger instead of turbo if you want instant power down low


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Offline rpar86

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #58 on: September 10, 2019, 05:38:06 PM »
Keep in mind we are still crossing the stream, about mid stream I'd say, so draw no conclusions yet.

NOOOOOOOoooooooo! Don't cross the streams! Bad stuff happens when you cross the streams!

Yeah, don't cross streams when your hub bolts are loose, you'll get water in the diff and ruin those perfectly fine 4.88's!  :knucklehead:
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Offline dave945

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #59 on: September 10, 2019, 05:44:51 PM »
Speaking of crossing the streams, doesn’t this look oddly like Don’s burb?



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Offline JR

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Offline rpar86

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Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #61 on: September 10, 2019, 06:34:46 PM »
$3k would be better spent toward a DMAX swap.


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Offline Flyin6

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #62 on: September 10, 2019, 07:31:54 PM »
https://www.summitracing.com/nv/parts/vor-4gx218-150l/overview/
Naw, I'm veto'ing the supercharger system

The vortech in JR's link is really like a turbo. Needs to spin up to propel the compressor. And it has no intercooler and working 6-8 psi. Totally 90's
A good roots blower will make 8 lbs and cost around 7K and that's it, no mo to be had

A turbo with a correctly sized exhaust will build boost fast, cost 1/2-2/3 what a blower would cost, make twice the power, be intercooled and have boost capabilities as far as my wallet could stand.

Looking at the On3 system, headers both sides, 84mm decapping those injectors JR sold me or buying some 80pph units and getting Justin to tune it to around 600-700 ft lbs (Thinking a pretty standard 800hp setup. Builds 90% of that torque at 3K and the whole thing done right slips in under 4K

Nossir, I think the smart money is on a well engineered turbo.

I am working through bugs now that it seems I'll be driving it anyday now. Have some stereo issues, dead speaker, annoying bass buzz and stuff like that

I can solve the fan easily by just reinserting the pin into the harness to ECM coupler. I noticed the professor removed it and let it dangle.

Have another annoying issue. The battery(s) will not stay charged very long. I may have charged them too many times, dunno. But I think I may have learned for the final time that I should not run a regular car battery and a deep cycle in parallel.

Doing some research, the deep cycle battery likes to charge very slowly at 13.5-13.7 volts. The standard acid car battery charges much more quickly at 14.5 or even more. So putting both on a normal car charging circuit is over boosting the aft deep cycle battery I think.

I had them all charged up when I drove it today to do another data log, then after fooling with the stereo for 45 min the lights dimmed and I was down to 11% charge showing 11.4 volts.

So gotta solve that, well those things then i can move on to the next project which has actually been going on for awhile now.
« Last Edit: September 10, 2019, 07:32:56 PM by Flyin6 »
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Offline Nate

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #63 on: September 10, 2019, 08:45:37 PM »
The next project being......the dmax tranny issue?
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Offline Flyin6

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #64 on: September 10, 2019, 09:47:18 PM »
The next project being......the dmax tranny issue?
Nope

Close hold at the moment

Just in case I don't go further. Not wanting another failed project. Figure I'll never hit a homerun if I don't step up to the plate and swing the bat!
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Offline JR

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #65 on: September 10, 2019, 10:15:14 PM »
So still in a rental?
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Offline Flyin6

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #66 on: September 11, 2019, 10:13:18 AM »
So still in a rental?
No

I use "The boys truck" when I need something, but I really don't need all that much. Enough to do right around here...for now.
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Offline EL TATE

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #67 on: September 11, 2019, 10:57:07 AM »


I am working through bugs now that it seems I'll be driving it anyday now. Have some stereo issues, dead speaker, annoying bass buzz and stuff like that


did this thing have a BOSE system in it originally by any chance?
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Offline Flyin6

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #68 on: September 11, 2019, 11:01:34 AM »
I don't think so Tater

But did have a factory bass booster amp thing

Fixing the dead speaker:

I'm going to pull the door panels back off anyway to get a good coating of "Cavity Coater" in there to save the pristine sheet metal.
« Last Edit: September 11, 2019, 11:02:49 AM by Flyin6 »
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Offline JR

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #69 on: September 11, 2019, 11:02:53 AM »
Hmm, how did Don's post get quoted by me?
« Last Edit: September 11, 2019, 11:04:46 AM by JR »
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Offline Flyin6

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #70 on: September 12, 2019, 08:53:58 PM »
So, I've been piddlin' (If that's even a word??) with the Burb wiring harness today. Had both large connectors that attach the wiring harness to the PCM apart.

What a mess!

This is the very reason my truck sat for so long, I just couldn't find anyone I trusted to do good work. That automotive professor who tore into the harness is a friggin idiot! I found wires not attached, one soldered onto a bare spot from another wire, and two pins cut off but still installed into the block!

In this modern America, we just hardly have any talent left at all. I mean, a repair shop did this. A guy who teaches automotive electric systems and repair at gateway college did that! WTH!

I'm like done with it. Flippin morons and hillbillies!

So I diligently pulled things apart, resoldered pins to their correct wires, double and triple checked, then reinserted them into their proper spots

I used a pinout chart to help:

http://www.lt1swap.com/99-02_vortec_pcm.htm

But I was left with a stubby cut off wire protruding from the wiring bundle on C1, the red harness. Not sure where it goes or what it does. It is green, and I haven't gone much farther than that yet, but when i started the engine, it started just fine, then when died. The motor won't idle at all without my feathering the pedal. Looking at the above pin-out chart, I see where two green wires go to pins earmarked for the IAC (Idle air control circuits). I'm betting that cut off wire is the cause. When I cut the wire that had been soldered onto another wire outside the connector, I'm betting they had used that circuit to power the IAC.

Who knows? Back at it tomorrow.
« Last Edit: September 12, 2019, 08:54:39 PM by Flyin6 »
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Offline TexasRedNeck

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #71 on: September 13, 2019, 12:43:55 AM »
If you want it done right....


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Offline Flyin6

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #72 on: September 13, 2019, 12:17:00 PM »
If you want it done right....


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So true!

Brings up a discussion Duane and I had once

I was pointing out the degree to which we had to involve ourselves, educate ourselves and equip ourselves for a myriad of tasks. What was driving it? Why did we have to become a HVAC expert, a master builder, a lawyer and so forth? Because we simply were unable to find quality workmanship at a reasonable price from a guy you could trust.

So between us we know so many things which we may seldom if ever have to do again, all because...
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Offline TexasRedNeck

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #73 on: September 13, 2019, 12:22:30 PM »
Which is one more reason why I love this gathering of men.  A variety of experience that helps us get educated about various issues.


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Offline Flyin6

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #74 on: September 13, 2019, 12:23:46 PM »
 :likebutton:
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Offline TexasRedNeck

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Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #75 on: September 18, 2019, 06:44:23 PM »
What’s the latest?

Btw Don. I have the full set of factory shop manuals wiring diagrams etc if you need me to research something for you


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Offline Flyin6

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #76 on: September 19, 2019, 09:40:50 AM »
What’s the latest?

Btw Don. I have the full set of factory shop manuals wiring diagrams etc if you need me to research something for you


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Tex, I was down to the last wire, but have been side tracked on a bunch of stuff, like an all day bible study with the bros. Man that was a deep dive.

Anyway, farmin today, then maybe get that done in the evening or tomorrow.

Now this is weird...I started it up the next day and it was idling just like a champ! It was like the IAC motor was unplugged the day before and now worked fine. Makes me suspect I have one which is going bad.

Not to worree, I have a TBSS manifold and 92mm TB going on soon. With the gears it is not hurting for low end get-up-n-go, so might as well bolt on the 20+ free HP that comes with the TBSS stuff.

Its getting close.
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Offline Flyin6

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #77 on: October 05, 2019, 11:18:06 AM »
So, I have it mostly done, but I have been chasing after a pesky electrical issue. I can get the fans to run, but at the cost of either not having them shutoff or with a weird thing that causes the rear fan for the cabin HVAC to run.
Then for some reason the CB radio pulls voltage sometimes with the key off, others not.

There is a single green wire with black stripe coming out of the wiring bundle that is no longer hooked to anything, although, I am pretty sure it is a ground for some circuit related to HVAC.

Another weird thing is that the dash mounted climate control motor that swings a valve from hot to cold is not allowing AC Cold air to distribute throughout the vehicle. It will make ice at the source, but it won't go anywhere.

The caveat to all this is that life has kept me pretty busy with loads of other things...Pre ranger in the hospital twice with attending Dr. visits, football season, farm stuff and another project that I had to start in order to possibly finish it before June of next year.

In any event, the truck drives really well, almost too good. Very cushy although somewhat floaty and a tad bit top heavy. It needs a lot more power to be fun and it will get it at some future point.

And I think it's about time to announce this other project...
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Offline JR

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #78 on: October 05, 2019, 01:21:37 PM »
Just put the fans on a stand dedicated circuit and be done. Might solve the other issues.

All the stuff is just a challenge, glad the preranger is better though for sure!

Do a blower, not a turbo. Instant all the time power and no exhaust work!
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Offline swbhobie16

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #79 on: October 05, 2019, 04:49:53 PM »
Just put the fans on a stand dedicated circuit and be done. Might solve the other issues.

All the stuff is just a challenge, glad the preranger is better though for sure!

Do a blower, not a turbo. Instant all the time power and no exhaust work!

i tried the blower instead of turbo argument. fell on deaf (maybe aged is the correct term..?) ears.  :grin:

Offline JR

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #80 on: October 05, 2019, 04:53:19 PM »
Just put the fans on a stand dedicated circuit and be done. Might solve the other issues.

All the stuff is just a challenge, glad the preranger is better though for sure!

Do a blower, not a turbo. Instant all the time power and no exhaust work!

i tried the blower instead of turbo argument. fell on deaf (maybe aged is the correct term..?) ears.  :grin:

I remember. But for what HE wants, he need to pay a little more.
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Offline EL TATE

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #81 on: October 07, 2019, 12:42:53 PM »
I gave the same argument...
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Offline longball

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #82 on: October 07, 2019, 08:51:59 PM »
What does he need a blower fer? Duramax engines already have a turbo.


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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #83 on: October 07, 2019, 09:07:16 PM »
What does he need a blower fer? Duramax engines already have a turbo.


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this.. this right here. hahah

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #84 on: October 07, 2019, 09:13:11 PM »
Fairly common swap, even see them for sale all the time.

Quick plane ride and a slow trip home,,,,,,,,,,,
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Offline Flyin6

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #85 on: October 08, 2019, 08:24:05 PM »
The fans are working and I can now drive it!

YIPPEE!

Yea, so I don't know exactly what was going on, but after checking it out, I couldn't find anything I did wrong, so I just decided to go drive it around.

I watched the temp come up like before then while driving stayed one tick mark below 210 on the gage. What was different, was that when I rolled to a stop and idled for a bit, the temp stayed right there. I couldn't hear the fan(s) running so I was puzzled as to why the fans still were not working. I drove it home and just let it idle for awhile, and no matter what I did the temp stayed exactly there.

That's when I started to suspect, were the fans actually running???

I looked into the fan shrouds and couldn't focus on any single blade...weird! So I grabbed a little stick and gingerly stuck it into the backside of the fans and was greeted with the rat-tat-tat of fan blades striking the stick. The darned thing was on but making no noise at all that I could hear. Quiet just doesn't do it justice.

When i switched the AC on, the other fan started right up like it should. The thing is cured, and if the truth be known, probably has been working for more than a week, I just never detected the motion of the fans.

So it is technically done from the massive mod, save trying to get the RR speaker working, figuring out how to tune the sub woofer and the primary amp. Aside from that she is sea worthy and ready for the quickly approaching fall break where the pre-rangers get a week off. I can feel some fall campin' in the air!!!!!!!
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Offline swbhobie16

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #86 on: October 08, 2019, 09:42:27 PM »
weather is better for camping now anyway..  :beercheers:

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #87 on: October 08, 2019, 10:20:59 PM »
weather is better for camping now anyway..  :beercheers:
Yes it is!
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Offline oklawall

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #88 on: October 08, 2019, 11:40:09 PM »
congratulation Don

Offline JR

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #89 on: October 09, 2019, 12:13:48 AM »
As long as they work, one less thing to worry about.
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Offline Flyin6

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #90 on: October 20, 2019, 12:21:37 PM »
So, I've been driving this thing a lot.

The driveability with respect to the suspension is amazing.

But it is really lacking in engine power. Like I have the parking brake set or I am towing a heavy load.

I have noted that the speedo is 7-8 mph off at 60 indicated (Actually going 67-68).

I pulled a data log and sent it to Justin, Black bear performance and he noted that there was either some spark knock or lifters or injectors that were causing spark timing to be retarded. I am not sure that the retarded timing could account for this large a lack of power. I would say that the truck might top out around 80 mph, so something is definitely amiss. Please note that I still had 87 octane fuel in there running a 91 octane tune.

However now after a half tank of 93 octane and another half tank of 92 octane it doesn't seem to be running any better.

Here's another mystery. Before the tune, with that larger torque cam, the thing had a nice choppy idle like you would expect. After the tune, the truck idles almost like a stocker! Now how did that happen?

Finally the gas mileage is obscenely terrible. Two nights ago I burned half a tank of gas driving to Louisville and back, like 1+15 each way at maybe 70 mph. Now at 70 the truck is really tacking up like 2600-2700 RPM so it must be sucking gas, but I have over 40 gallons, so twenty gallons in 2+30 of driving. Make that possibly 170 miles to equate to 8.5 MPG.

So my concerns are:

Something major is wrong with the motor like cam timing
or the tune is way out of wack
If something major is not amis, then I doubt I could use this truck to pull a camper across country
If something is wrong that would account from the thing running so poorly, then would a turbo help all that much
And if I did turbo it, I'd be on boost all the time
Then what would the mileage be then?
Dunno, but this gas combo is just not panning out
I plan to do some diagnostics and hopefully find a culprit
But if I don't, I am not sure I may not be forced to put a duramax into the truck
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Offline wyorunner

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #91 on: October 20, 2019, 12:50:20 PM »
Yep, you need Jon’s truck! If for nothing else but the engine, transpair and wiring harnesses!!!!

Offline Bigdave_185

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #92 on: October 20, 2019, 12:54:15 PM »
Well you won’t have any augment here about you putting a diesel motor in,  you’ll have to hear a whole bunch of I told ya so from the peanut gallery


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Offline TexasRedNeck

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #93 on: October 20, 2019, 02:18:21 PM »
Sorry to hear Don. My 2001 always got about 12 mpg lifted and stock motor.

And remember boys. He has to have 2001-2002 wiring harness and FICM to make the conversion.  Different comm protocol.

That’s an expensive proposition.

Perhaps pulling the motor and having someone check it over and tune it in a dyno would be a good route?


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Kids today don't know how easy they have it. When I was young, I had to walk 9 feet through shag carpet to change the TV channel.

Joshua 6:20-24

Offline wyorunner

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #94 on: October 20, 2019, 02:27:20 PM »
Sorry to hear Don. My 2001 always got about 12 mpg lifted and stock motor.

And remember boys. He has to have 2001-2002 wiring harness and FICM to make the conversion.  Different comm protocol.

That’s an expensive proposition.

Perhaps pulling the motor and having someone check it over and tune it in a dyno would be a good route?


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Ahh yes, trying to make all the factory stuff inside the burb work. Still in the mindset of nothing is factory, simply because that is what I am dealing with.

Offline Mrwoody

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #95 on: October 23, 2019, 10:58:44 PM »

Offline TexasRedNeck

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #96 on: October 23, 2019, 11:24:19 PM »
Wow. That’s nice


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Kids today don't know how easy they have it. When I was young, I had to walk 9 feet through shag carpet to change the TV channel.

Joshua 6:20-24

Offline swbhobie16

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #97 on: October 24, 2019, 07:41:08 AM »
Big Don
Here’s your next project

https://bringatrailer.com/listing/1990-chevrolet-3500/

i can think of a few things to do with that..

Offline TexasRedNeck

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #98 on: October 24, 2019, 08:29:52 AM »
What axles do you think it has under it?


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Kids today don't know how easy they have it. When I was young, I had to walk 9 feet through shag carpet to change the TV channel.

Joshua 6:20-24

Offline stlaser

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #99 on: October 24, 2019, 08:44:56 AM »
What axles do you think it has under it?


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Unless I am mistaken on the later year units it should have a 60/14 sm465/205 454
« Last Edit: October 24, 2019, 08:45:52 AM by stlaser »
Living in the remote north hoping Ken doesn’t bring H up here any time soon…..

 

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