What am I doing wrong?????

[joecar]

More info:
- are you running with MAF and front O2 sensors (CL/trimming)...?
- are you running with cats and rear O2 sensors...?
- what mods does the engine have...?

[joecar]

So pedal position correlates with throttle blade position.
So intake manifold manifold and plumbing is not restricted.

Remove the front O2 sensors and try to rev the engine above 1600 rpm.

[joecar]

Try this: hold throttle at 100% and log MAF which should increase... I want to see where the MAF levels out at.

Before logging:

Remove a bunch of pids; every 24 pid channels slows down the sample rate by 1 factor;
keep the pid channel count no greater than 24, since 1-24 channels gives the fastest sample rate;
see the bottom of the PIDs tab for pid channel count (some pids take 2 channels).

Log these pids:
VSS
RPM
TP
MAP
MAF
DYNAIR
DYNCYLAIR
EQIVRATIO or AFR (not both)
IAT
ECT
LONGFT1
LONGFT2
HO2S11 (not HO2S12 or HO2S22)
HO2S21 (not HO2S12 or HO2S22)
IBPW1
IBPW2
INJDC1 (not INJ1DC)
INJDC2 (not INJ2DC)
MFCOUNT
(that should be 24 pids channels; if not the delete MFTOTAL).

[Gjohnson]

I will try some of those ideas above, when I get home this evening. I do know that there shouldn't be any restrictions at all in the manifold or plumbing. I had the setup running fine with the GTO pcm, I unplugged the battery, swapped the 02 sensor pins that needed to be swapped and grounded the 02s that needed to be grounded. Installed the new PCM and this reving issue showed up. As far as my setup is concerned. I have front 02 sensors, the rear O2 sensors have been tuned out. No Cats. I have a 4in intake with K/N filter, LS6 Cam and LS6 springs and modified C5 corvette manifolds. No other mods.

I will try the PiDs that you listed and post the log later. Although, it seems like I tried some of those PIDS on the first 2 logs I did, but they weren't recording any data. I will try again. Oh, and for some reason it seems that I can't log any info for the Long term or Short term fuel trims. Do my O2 seems to be functioning properly?

I will try to hold the throttle at 100% again and see what it does. I have tried that in some of the other logs posted but it seems like the fuel or something keeps cutting out when it hits 1600rpms.

[joecar]

H02S11 in your logs was flatlined at ~450mV indicating open circuit.

HO2S21 was not in the logs so far.

If the HO2Sx1 voltages indicate a problem, then LTFT's and STFT's will be zero.


Did the PCM come from an auto trans F-body...? I wonder if the P/N rev limiter is set to 1500...?

[Gjohnson]

I believe the PCM came from a manual F-Body. When I hook the PCM up to EFI live, the yellow bar at the bottom shows the vin for the F-Body and it has Manual in perenthesis.

[joecar]

The scantool may show manual for an auto trans PCM.

[5.7ute]

Most important IMO is to verify the map sensor hits around 100kpa key on engine off.(depending on your altitude)
To lose manifold pressure under acceleration is extremely weird & mostly caused by mechanical issues.

[Gjohnson]

Ok, 2 more logs with the PIDs Joe car recommended. Keep in mind the engine isn't warmed up at all. The 1st log was done with a MAP PID that didn't show pressure, so I switched on the 2nd Log.

Also, I tried mashing the pedal with the key on and engine off, it shows the throttle % increasing, but it doesn't seem to log the MAP pressure with the engine off.


Attachment 8678Attachment 8677

[joecar]

That looks like a limiter kicking in/out.

TP only goes to 85%, where is the other 15%...?

MAP looks ok, it's is going to 99kPa which is BARO in your geography; and MAP rises as TP rises, it looks ok now.