Idle routines not kicking in everytime. HELP!!!
03-25-2009, 11:57 AM
#21
Had a customer with no VSS call me to tell me that he swapped to a th400 and it went DEAD LEAN at WOT... this is last week. Guess what; he hooked a wheel speed sensor to the PCM (doesn't have to be the RIGHT speed) and now he gets 12.6:1 @ WOT. You should be stuck in idle timing ('base') timing until the vehicle moves or senses that it is.
03-25-2009, 12:09 PM
#22
Had a customer with no VSS call me to tell me that he swapped to a th400 and it went DEAD LEAN at WOT... this is last week. Guess what; he hooked a wheel speed sensor to the PCM (doesn't have to be the RIGHT speed) and now he gets 12.6:1 @ WOT. You should be stuck in idle timing ('base') timing until the vehicle moves or senses that it is.
We added another ground from the motor to the chassis and it seemed to come back to the idle routines once we let off the gas. Our lunch had just gotten here so we haven't had alot of time to play with it and it could be a fluke. We are going to go do some datalogging on a little drive and see what happens.
03-25-2009, 12:30 PM
#23
Or until you break the throttle position threshold.
We added another ground from the motor to the chassis and it seemed to come back to the idle routines once we let off the gas. Our lunch had just gotten here so we haven't had alot of time to play with it and it could be a fluke. We are going to go do some datalogging on a little drive and see what happens.
We added another ground from the motor to the chassis and it seemed to come back to the idle routines once we let off the gas. Our lunch had just gotten here so we haven't had alot of time to play with it and it could be a fluke. We are going to go do some datalogging on a little drive and see what happens.
That car wouldn't fuel properly at WOT regardless until he hooked it up. I didn't get to see the before and after as he is doing it at his home, but it went from 15's:1 (or worse) every time to 12.6:1 every time after hooking it up. Like i said, I haven't had it in front of my, but have been back and forth on the phone with him.
03-26-2009, 01:04 PM
#24
Hope that ground helps; it could...
That car wouldn't fuel properly at WOT regardless until he hooked it up. I didn't get to see the before and after as he is doing it at his home, but it went from 15's:1 (or worse) every time to 12.6:1 every time after hooking it up. Like i said, I haven't had it in front of my, but have been back and forth on the phone with him.
That car wouldn't fuel properly at WOT regardless until he hooked it up. I didn't get to see the before and after as he is doing it at his home, but it went from 15's:1 (or worse) every time to 12.6:1 every time after hooking it up. Like i said, I haven't had it in front of my, but have been back and forth on the phone with him.
05-13-2009, 05:00 PM
#27
It's still not solid. I ended up tuning around it for right now. We have been working out the 1/4 mile racing bugs and the car sees almost no street duty so it hasn't been a big deal. We did get another PCM to try just as a swap in.
05-14-2009, 01:26 PM
#28
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That sucks. There are sooo many threads about this and no solid answer. My TPS % keeps wanting to hang at 2% or 3% with engine running. It always stays @ 0% when key on engine off.
My diagnostics so far:
+5v is a constant 4.96v with the engine running or not
Ground is 0.02 ohms between plug and chassis with engine running or not
My TPS voltage at fully closed was 0.70v, well above the 0.50v recommended voltage. I broke off the alignment tab and drilled out the screw holes on the TPS fully so I could rotate is slightly to make fully closed TB @ 0.49v. This 0.49v is CONSTANT whether the engine is running or not. Will test out everything with my tuner soon.
My diagnostics so far:
+5v is a constant 4.96v with the engine running or not
Ground is 0.02 ohms between plug and chassis with engine running or not
My TPS voltage at fully closed was 0.70v, well above the 0.50v recommended voltage. I broke off the alignment tab and drilled out the screw holes on the TPS fully so I could rotate is slightly to make fully closed TB @ 0.49v. This 0.49v is CONSTANT whether the engine is running or not. Will test out everything with my tuner soon.
05-15-2009, 11:26 AM
#29
That sucks. There are sooo many threads about this and no solid answer. My TPS % keeps wanting to hang at 2% or 3% with engine running. It always stays @ 0% when key on engine off.
My diagnostics so far:
+5v is a constant 4.96v with the engine running or not
Ground is 0.02 ohms between plug and chassis with engine running or not
My TPS voltage at fully closed was 0.70v, well above the 0.50v recommended voltage. I broke off the alignment tab and drilled out the screw holes on the TPS fully so I could rotate is slightly to make fully closed TB @ 0.49v. This 0.49v is CONSTANT whether the engine is running or not. Will test out everything with my tuner soon.
My diagnostics so far:
+5v is a constant 4.96v with the engine running or not
Ground is 0.02 ohms between plug and chassis with engine running or not
My TPS voltage at fully closed was 0.70v, well above the 0.50v recommended voltage. I broke off the alignment tab and drilled out the screw holes on the TPS fully so I could rotate is slightly to make fully closed TB @ 0.49v. This 0.49v is CONSTANT whether the engine is running or not. Will test out everything with my tuner soon.
05-15-2009, 12:02 PM
#30
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Yeah, the problem is in my RX7, PCM is in the cabin. It appears to be idling a LOT better with the adjusted TPS and idles around 800rpm. I have to wait until my tuner gets back in town Monday to verify and clean up some of the tables.
05-15-2009, 12:42 PM
#31
Could this have anything to do with the following table Idle > Idle Rpm > Adaptive idle rpm > Min ECT you have set to 255. Not sure if this could help or not but maybe try setting that around 170 degrees. I do think a lot of the issues are to do with no speed sensor.
