Easy (and free) to check. Troubleshooting 101. 
I need help!!!! Please
Race Director
Joined: Feb 2002
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From: Compound in the Grove, Ga.
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St. Jude Donor '16
Have a 95 did the same was a bad injector unplugged them 1 at a time until i found the bad 1 replaced all 8 , I also replaced the opti as it had 200K mile.
Race Director
Joined: Dec 2000
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From: El Paso Texas
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Cruising
Joined: Oct 2012
Posts: 14
Likes: 0
From: Breaux Bridge Louisiana
One of the thing you said was your oil gauge would move from midway to 80 psi, you might want to check it with a different gauge, screw it into where the original sending unit is, it could be loosing oil pressure and that maybe the clicking noise your hearing, lifters might be loosing prime, that would cause come of the problems your having, loss power, bad fuel milage.
Thread Starter
Cruising
Joined: Jan 2013
Posts: 12
Likes: 0
From: Sunnyvale Ca
I cleaned my idle air control valve a few days ago and it idled great and then this morning i drove to school and back then when I started the car to go to work the idle went back down to idling at 500 rpm should I replace the idle air control valve? And I am still going to check the injectors as soon as i get off from work.
Advanced
Joined: Nov 2012
Posts: 62
Likes: 1
From: Amarillo Tx
No way I coulda owned c4s without being glued to these forums youll need to do it or sell it
When I bought mine knew next to nothing about efi...after getting soaked for almost 3k and nothing fixed broke down bought a pc and hopped online.
Trust me..it will try your patience once you get a grip on it your views will change. Or youll burn it to the ground.
Hang tight learn how to do it yourself.
WHAT is your location maybe a member lives near you and can help out done all the time here.
Go to user CP in the upper left hand of the page and fill out your profile.
When I bought mine knew next to nothing about efi...after getting soaked for almost 3k and nothing fixed broke down bought a pc and hopped online.
Trust me..it will try your patience once you get a grip on it your views will change. Or youll burn it to the ground.
Hang tight learn how to do it yourself.
WHAT is your location maybe a member lives near you and can help out done all the time here.
Go to user CP in the upper left hand of the page and fill out your profile.
Burning Brakes
Joined: May 2007
Posts: 965
Likes: 13
From: turn 12 at Road America or TX
I chased similar problems and it turned out to be a flakey ECM - but it would spastically set several error codes. Does yours show the service engine light with the ignition on but engine not running - want to know if the service engine light really lights. If not, the ECM might be hiding some problems which will help you troubleshoot it.
Also, check the injectors which should be about 12 ohms. Less than 6 ohms or so means the alcohol in your fuel has destroyed them.
Also, check the injectors which should be about 12 ohms. Less than 6 ohms or so means the alcohol in your fuel has destroyed them.
Race Director
Joined: Dec 2003
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From: Fremont Ca
2022 C4 of the Year Finalist - Modified
Thread Starter
Cruising
Joined: Jan 2013
Posts: 12
Likes: 0
From: Sunnyvale Ca
I chased similar problems and it turned out to be a flakey ECM - but it would spastically set several error codes. Does yours show the service engine light with the ignition on but engine not running - want to know if the service engine light really lights. If not, the ECM might be hiding some problems which will help you troubleshoot it.
Also, check the injectors which should be about 12 ohms. Less than 6 ohms or so means the alcohol in your fuel has destroyed them.
Also, check the injectors which should be about 12 ohms. Less than 6 ohms or so means the alcohol in your fuel has destroyed them.