Engine is in, car all sensors hooked up, and car is doing some strange stuff.
If you attempt to start the car with the MAF plugged in, it revs to about 2k, then dies unless you start feeding it throttle. You need an initial surge to keep the engine going, but if you slowly lift off throttle it will settle to a 900rpm idle with about 5-7% throttle. However, remove your foot and it dies immediately.
After everything I've read that sounds like a MAF issue, or a vacuum leak issue. I haven't ordered a new MAF yet, but thats the next step. The reason I haven't is that when the engine is started the MAF AFGS readings seem correct. about 5-10gm/s varying by idle speed.
So the recommendation is to pull the maf plug and start the car. Well, then it starts right up, but the idle is insanely high, 2500-3000rpm.
The parts:
11:1 LT1
Ported stock heads
Ported LT1 intake
Lloyd Elliot 231/239 110lsa cam
Long tubes
new plugs, wires, O2s, knock sensor, IAC motor. Still original TPS, and MAF.
MadZ28 base tune loaded. INJ Constant is correct for the SVO Redtops adjusted for 43psi base pressure.
I tried to search for a vacuum leak, but every port is sealed tight. Spraying carb cleaner anywhere made zero difference in idle.
Fuel pressure checks out, steady 45psi on the guage.
All injectors are firing, checked with a noid light for signal, and ohm'd the injectors, all checked out good.
Opti is a brand new GM unit.
TPS voltage is reading accurately. Smoothly goes from 0-100% on the TTS logs too.
If anyone has TTS Datamaster, I have logs I can post if you'd like to see them.
Engine is currently open header, so I am not sure if the knock retard is applicable, its pretty damned loud. I don't have a y-pipe fabbed up yet.
No codes at all.
http://home.comcast.net/~thirdgen89gta/cars/datalogs/start1.uni
http://home.comcast.net/~thirdgen89gta/cars/datalogs/start2.uni
http://home.comcast.net/~thirdgen89gta/cars/datalogs/start3.uni
http://home.comcast.net/~thirdgen89gta/cars/datalogs/start4.uni
If you attempt to start the car with the MAF plugged in, it revs to about 2k, then dies unless you start feeding it throttle. You need an initial surge to keep the engine going, but if you slowly lift off throttle it will settle to a 900rpm idle with about 5-7% throttle. However, remove your foot and it dies immediately.
After everything I've read that sounds like a MAF issue, or a vacuum leak issue. I haven't ordered a new MAF yet, but thats the next step. The reason I haven't is that when the engine is started the MAF AFGS readings seem correct. about 5-10gm/s varying by idle speed.
So the recommendation is to pull the maf plug and start the car. Well, then it starts right up, but the idle is insanely high, 2500-3000rpm.
The parts:
11:1 LT1
Ported stock heads
Ported LT1 intake
Lloyd Elliot 231/239 110lsa cam
Long tubes
new plugs, wires, O2s, knock sensor, IAC motor. Still original TPS, and MAF.
MadZ28 base tune loaded. INJ Constant is correct for the SVO Redtops adjusted for 43psi base pressure.
I tried to search for a vacuum leak, but every port is sealed tight. Spraying carb cleaner anywhere made zero difference in idle.
Fuel pressure checks out, steady 45psi on the guage.
All injectors are firing, checked with a noid light for signal, and ohm'd the injectors, all checked out good.
Opti is a brand new GM unit.
TPS voltage is reading accurately. Smoothly goes from 0-100% on the TTS logs too.
If anyone has TTS Datamaster, I have logs I can post if you'd like to see them.
Engine is currently open header, so I am not sure if the knock retard is applicable, its pretty damned loud. I don't have a y-pipe fabbed up yet.
No codes at all.
http://home.comcast.net/~thirdgen89gta/cars/datalogs/start1.uni
http://home.comcast.net/~thirdgen89gta/cars/datalogs/start2.uni
http://home.comcast.net/~thirdgen89gta/cars/datalogs/start3.uni
http://home.comcast.net/~thirdgen89gta/cars/datalogs/start4.uni