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I checked out the map sensor reading and noticed what was said about it should be reading around 100kpa when I compared it to my daily drive avalanche which has the same map so I replaced the map...

I already did I have an autometer gauge permenty mounted in the aftermarket fuel rail

I'll check that but i reflashed it with an earlier calibration file that ran pretty decent and now it starts and runs again

Cranking datalog

The only DTCs it has is the MAF fail which I habe disabled for SD tuning, I'll try to crank it over and upload that log file tonight

I have a 99 Tahoe with a custom built vortec style 383 stroker in it which I have converted to run on the 0411 Gen 3 PCM and I had that thing running ok driving it around tuning it when I noticed the...

I think the backfire was a result of the loss of spark loaded with fuel then sparked again before it completely doed

This is not an ls motor this is a 96-98 vortec truck based roller 383 stroker with a bullet performance timing set which I verified is still dot to dot where I degreed it to and the distributor is...

Im picking up a new cap and rotor on KY way home, I've ohm and visually inspected every wire in this entire harness first then proceeded to other parts. This engine has aftermarket heads and a world...

Yes I'm certain the exhaust has 0 obstructions because it has headers to a custom offroad 2.25" wye toast 3" single so I see no way possible for it to get obstructed

Checked for spark with a spark tester at the coil and at the plugs. I've driven through some very heavy rains but when backfired and shut down it was a dry sunny day and since then I've replaced the...

Already checked all of that, injectors are firing, I already readjusted the rockers because their full roller and I had one start ticking so I already pulled the covers and readjusted all of them and...

Already check that, when I pulled the distributor cap the rotorpointer was dead perfect with how I set it at TDC when I had ot running

Ok I followed the directions in the attached files and every input and output required has power measured between 12.25 and 12.4vdc and every ground in the entire harness registers between 64 and 75...

I have a 99 Tahoe with a 383 stroker 4l80e swap that I was running using an 0411 pcm with the 02 express 3500 calibration. This thing ran great once I got the calibration close to where I wanted it...

Hello I have a few questions hopefully someone can help with. I have an 0411 pcm from a 2002 s10 with the 4.3/4l60e combo is there a way using hp tuners to either activate the other 2 cyls and...

Can someone please help me figure out what's going on with my buddies truck. I've been trying to tune it for a few days now and it keeps dropping out the MAP signal and periodically dropping out the...

Well I'm not trying to "skimp" on anything with my build the only thing that has not gotten replaced/rebuilt/refurbished/upgraded is the Tahoe body itself however right now I have a baby due any day...

I'm in the middle of doing and 0411 swap in my 99 OBS 383/4L80E Tahoe build and I know that everyone likes to use the Express Van Cal as a starting point which I've downloaded but after reading i...

Helo does anyone know of any way to test a junkyard pcm to see if its usable before using any credits on it? I'm doing a black box to 0411 conversion on my 99 Tahoe efi gen 1 383 build using a PCM...

I've been fighting a buddy of mines E38 2008 Silveraldo tune for a little bit, here's a little history on the truck the DOD system failed causing the timing chain to break so I rebuilt the engine and...

I've been fighting an issue while trying to tune my buddies 2008 Silveraldo with a built 5.3l I just finished and for some reason most of the time the map sensor keeps dropping off the scanner like...

I'm currently building a gen 3 5.3l with twin 67mm turbos for my 69 Chevelle and have a lot of questions as far as using a factory PCM for my car any help would be greatly appreciated..

Here's a...