I would still change it out so that it's correct!
I would still change it out so that it's correct!
230" Dragster - 2000 LS1, 02020003 Speed Density, PRC 2.5 Heads,
MS3 Cam 237/242 .603/.609, Vic Jr. intake, Holley 1000CFM TB,
PowerGlide, 5000 stall converter. 8.70@154 MPH
My Projects Homepage: http://www.horsepowerracing.com
Get it on a dyno and hook up a timing light and see what happens... It has to be a spark issue, it just looks like a rev limiter. If it was fuel the wideband would reflect it.
230" Dragster - 2000 LS1, 02020003 Speed Density, PRC 2.5 Heads,
MS3 Cam 237/242 .603/.609, Vic Jr. intake, Holley 1000CFM TB,
PowerGlide, 5000 stall converter. 8.70@154 MPH
My Projects Homepage: http://www.horsepowerracing.com
Not necessarily... it can be fuel and the wideband read incorrectly...
Still.. i feel its a coil issue as when it "heats" up it starts to act weird. The tune has nothing "wrong" that would make this happen... If it misses it will read lean.
"All that is needed for the triumph of evil is that good men do nothing..."
Wouldnt all the coils have to be bad in order to not let it rev? If one was bad it would just run bad but would still rev.
It does seem that the only thing left is to replace the computer.
Lee
230" Dragster - 2000 LS1, 02020003 Speed Density, PRC 2.5 Heads,
MS3 Cam 237/242 .603/.609, Vic Jr. intake, Holley 1000CFM TB,
PowerGlide, 5000 stall converter. 8.70@154 MPH
My Projects Homepage: http://www.horsepowerracing.com
Too big of a miss on a few cylinders and you will have a problem.. I had a similar problem, changed ECUs and was done with it.
"All that is needed for the triumph of evil is that good men do nothing..."
This is the 3rd PCM I have tried. Thought the original 98 was bad and swapped it out. Then I converted to the 99-04 PCM with the new stand alone harness. Have changed the coil packs and then tried them on my truck and they ran fine. The injectors were new but I bought another new set and tried that. Second new set of MSD wires. Second set of new plugs. Second new fuel pump. Second new fuel regulator. 4 new crank sensors. 2 new cam sensors. 3 new TPS switches. Burned a 50 gallon drum of VP. Burned up a set of drag radials. I have spent thousands chasing this problem.
The reason I'm still using an auto trans base tune is because I'm still using the stock shifter and park/neutral switch.
I agree it only takes fuel and ignition, the right amount at the right time. I feel the amount is right but is occuring at the wrong time.
In the log today starting at frame 1237 I did a 5 sec blast. AFR looks normal and followed commanded along with everything else, but it was breaking up so bad it would not accellerate. It should have hit 7200 rpm. It just doesn't make any sense to me.
2002 Chevy truck, SCSB 2WD, Stroked LS3 w/Big Mutha Thumper cam
2002SS Camaro LS7/427 with stock suspension setup
2012 Chevy truck, SCSB 2WD, Magnaflow exhaust + K&N
So, your telling me that cold you can go out there and do a 5000 to 7000 RPM blast and log it?
Is it possible that you have the injector wiring wrong and it's firing the injectors in the wrong sequence?
Maybe this could be resoned because the injector timing cold is fired at a different time.
Change B3702 and B3703 all to 2.55 and see if it will rev....
230" Dragster - 2000 LS1, 02020003 Speed Density, PRC 2.5 Heads,
MS3 Cam 237/242 .603/.609, Vic Jr. intake, Holley 1000CFM TB,
PowerGlide, 5000 stall converter. 8.70@154 MPH
My Projects Homepage: http://www.horsepowerracing.com
2002 Chevy truck, SCSB 2WD, Stroked LS3 w/Big Mutha Thumper cam
2002SS Camaro LS7/427 with stock suspension setup
2012 Chevy truck, SCSB 2WD, Magnaflow exhaust + K&N