Idle issues
Safety Car
Joined: Nov 2005
Posts: 3,532
Likes: 1,185
From: Arizona - If you don’t know CFI, STOP proliferating the myths around it...
Safety Car
Joined: Nov 2005
Posts: 3,532
Likes: 1,185
From: Arizona - If you don’t know CFI, STOP proliferating the myths around it...
Here's another thought... I have been working with a shop in NJ about an 82 that has some wonky stuff going on. I finally told the shop who seems to be very good at what he does and knows CF pretty good that the ECM was bad for his CTS and TPS issue. He got a new ECM and it cured his CTS and TPS issue, but now has a IAC issue with both of them not moving, ever. So, we are back to an ECM problem probably with a driver issue. I just got off the phone with him and between Bob at Dynamic EFI and myself we think maybe going to an EBL Flash is the better way to go and it looks like that's what's going to happen. He will of course have to have a HAM, but that isn't an issue and I do have the new and improved boards on hand. I don't know how many stock 82s or 84s are out there running and EBL flash, but I assume there are a few. I feel pretty confident that the EBL will cure this 82s problems and with a good tune it will probably run better anyway.
So, if the IAC's are not moving and the harness is OK, then the ECM becomes a suspect, jus sayin'. Any update on this Greg?
Not sure I understand what you are trying to say here. 11 psi FP should be OK for the engine to run, but not correct, should be 13psi. .52 or .525v is fine for the TPS and that's what you want.
So, if the IAC's are not moving and the harness is OK, then the ECM becomes a suspect, jus sayin'. Any update on this Greg?
In his other post (mods can they be joined together and one deleted?) he mentioned 11 psi fuel pressure and TPS voltage of .52 something.
Drifting
Joined: Jun 2018
Posts: 1,402
Likes: 287
From: Brisbane Australia
C4 of Year Finalist (performance mods) 2019
I spoke to him yesterday and he is at his wits end with this car. It appears that the harness is good and that the IACs may be bad but I’m not 100% convicted. He lives about 1000 miles from me so I can’t pop around and have a look. It’s a classic example of years of misdiagnoses and misconfiguration by “people” who don’t know what they are doing. He said he was thinking about running over it with a D9 or parting it out. I advised against both options.
Pro
Joined: Mar 2020
Posts: 500
Likes: 27
Here's another thought... I have been working with a shop in NJ about an 82 that has some wonky stuff going on. I finally told the shop who seems to be very good at what he does and knows CF pretty good that the ECM was bad for his CTS and TPS issue. He got a new ECM and it cured his CTS and TPS issue, but now has a IAC issue with both of them not moving, ever. So, we are back to an ECM problem probably with a driver issue. I just got off the phone with him and between Bob at Dynamic EFI and myself we think maybe going to an EBL Flash is the better way to go and it looks like that's what's going to happen. He will of course have to have a HAM, but that isn't an issue and I do have the new and improved boards on hand. I don't know how many stock 82s or 84s are out there running and EBL flash, but I assume there are a few. I feel pretty confident that the EBL will cure this 82s problems and with a good tune it will probably run better anyway.
So, if the IAC's are not moving and the harness is OK, then the ECM becomes a suspect, jus sayin'. Any update on this Greg?
Not sure I understand what you are trying to say here. 11 psi FP should be OK for the engine to run, but not correct, should be 13psi. .52 or .525v is fine for the TPS and that's what you want.
So, if the IAC's are not moving and the harness is OK, then the ECM becomes a suspect, jus sayin'. Any update on this Greg?
Not sure I understand what you are trying to say here. 11 psi FP should be OK for the engine to run, but not correct, should be 13psi. .52 or .525v is fine for the TPS and that's what you want.
I need to double check , but I think on the 86 the voltage is .54 for the tps at idle.
Drifting
Joined: Jun 2018
Posts: 1,402
Likes: 287
From: Brisbane Australia
C4 of Year Finalist (performance mods) 2019
This is a crossfire Throttle Body Injection car. GM recommend 9 - 13psi. It’s generally excepted that 13 - 15psi is better. Iirc a carby car only needs somewhere between 3 and 6psi.
