Poor idle when cold closed loop

***Fastbird*** · 09-18-2018, 01:45 PM

Some quick clarification. Bryan never did the chip tunes. It was always Alvin who took care of those under the PCMForLess name. Alvin still is "PCM's of NC" to my knowledge.

Jay, your fuel pressure at prime should be higher than 35. I'd be curious to see if you have a leaking injector, or possibly a leaking regulator? Based off your symptoms, especially with the hard start, I'm leaning towards the injectors leaking. If my memory still serves me, Accel injectors back in the day were notorious for being leakers.

**jaysz2893** · 09-18-2018, 03:02 PM

Originally Posted by Fastbird

Some quick clarification. Bryan never did the chip tunes. It was always Alvin who took care of those under the PCMForLess name. Alvin still is "PCM's of NC" to my knowledge.

Jay, your fuel pressure at prime should be higher than 35. I'd be curious to see if you have a leaking injector, or possibly a leaking regulator? Based off your symptoms, especially with the hard start, I'm leaning towards the injectors leaking. If my memory still serves me, Accel injectors back in the day were notorious for being leakers.

Yes! Alvin! I'm leaning on the injectors being the culprit too. The FPR was bad as was the pump from sitting all those years with old ethanol fuel in the system. Makes sense that the injectors would suffer too. Plus on my budget at the time , only the used and mediocre was all I could afford.. lol.

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***Fastbird*** · 09-18-2018, 07:42 PM

Originally Posted by jaysz2893

Yes! Alvin! I'm leaning on the injectors being the culprit too. The FPR was bad as was the pump from sitting all those years with old ethanol fuel in the system. Makes sense that the injectors would suffer too. Plus on my budget at the time , only the used and mediocre was all I could afford.. lol.

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[gentle reminder] Pop that rail up and have a look. You'll know real quick once you key it on. [/gentle reminder since it's been so long for you]

**jaysz2893** · 09-22-2018, 06:19 AM

well, that didnt totally fix it. It looked like 2 we leaking so i replaced the set with a new set of accels. I had some bosch but they wont fit the damn intake, too short. Now if i can get it to fire over it doesn't stick rich. problem is I cant get ti to fire over and run smooth, Seems like ignition now. I just put a delco opti and coil in before i got it inspected. Nothing is showing up in trunerpro, but I cant get it to run long enough. Still needs to crank a lot and the throttle body open to get it to fire over.

***Fastbird*** · 09-22-2018, 08:26 AM

Originally Posted by jaysz2893

well, that didnt totally fix it. It looked like 2 we leaking so i replaced the set with a new set of accels. I had some bosch but they wont fit the damn intake, too short. Now if i can get it to fire over it doesn't stick rich. problem is I cant get ti to fire over and run smooth, Seems like ignition now. I just put a delco opti and coil in before i got it inspected. Nothing is showing up in trunerpro, but I cant get it to run long enough. Still needs to crank a lot and the throttle body open to get it to fire over.

Are you running it on the last good tune it ran on? If not, switch to that, take any variables out of the equation.

**jaysz2893** · 09-22-2018, 09:17 AM

Yep, it is the one that ran the car last weekend for 80 miles.... even foot the floor of wont fire right. Really seems ignition to me now. When I took it to DMV I had big cats in the pipes and it got Hot under the hood. Enough to melt some wire loom. I'm gonna track down the wires and I have a spare ICM somewhere. I'll report back... lol

Originally Posted by Fastbird

Are you running it on the last good tune it ran on? If not, switch to that, take any variables out of the equation.

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***Fastbird*** · 09-22-2018, 11:19 AM

I doubt it's the ICM. That's a "works or it doesn't" type of thing.

If you want the service manual diagnosis chart, I still have my 93 service manual and can put some pics up.

**Injuneer** · 09-22-2018, 11:53 AM

Or download a copy for free, courses GaryDoug:

https://www.mediafire.com/?40mfgeoe4ctti

**jaysz2893** · 09-22-2018, 12:34 PM

I have my manual and I am walking away from it now. I couldn't find my spare ICM. I took a video and I'll post it soon. I knew this damn car was going to do this to me.

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