EVERYTHING in the ignition has been replaced still missing
03-20-2006, 08:54 PM
#1
Registered User
Thread Starter
Join Date: Mar 2002
Location: Ocala, Florida
Posts: 3,245
EVERYTHING in the ignition has been replaced still missing
Ok, I've put in a new opti, new plug wires, new plugs, tried a different coil, tried a different ICM, and my car is still missing. Fuel pressure is good. I'm ****ing out of ideas. As soon as I get this **** fixed my cars going up for sale. 
The miss got worse as soon as I put in new plugs, so I guess I'll try another set of plugs, other than that I have no ****ing idea what to try next.
And to describe the miss, it sputters and backfires, at any RPM, at any engine temperature, at any temperature outside. If i'm going at light load cruising, it backfires out the exhaust, and under load it backfires out the intake too.
*edit*
I brought it to a mechanic before I did the wires, the valve lash is good, compression is good, fuel pressure is good, he tried a new maf, I tried new 02's. The MAP reads fine too. I think he said only 3 cylinders werent missing or something like that, but sometimes it completly falls on its face too. And my friend has my old opti in his car, so I know I didn't get a bad opti.
The miss got worse as soon as I put in new plugs, so I guess I'll try another set of plugs, other than that I have no ****ing idea what to try next.And to describe the miss, it sputters and backfires, at any RPM, at any engine temperature, at any temperature outside. If i'm going at light load cruising, it backfires out the exhaust, and under load it backfires out the intake too.
*edit*
I brought it to a mechanic before I did the wires, the valve lash is good, compression is good, fuel pressure is good, he tried a new maf, I tried new 02's. The MAP reads fine too. I think he said only 3 cylinders werent missing or something like that, but sometimes it completly falls on its face too. And my friend has my old opti in his car, so I know I didn't get a bad opti.
Last edited by speed_demon24; 03-20-2006 at 09:10 PM.
03-20-2006, 10:17 PM
#8
Registered User
Thread Starter
Join Date: Mar 2002
Location: Ocala, Florida
Posts: 3,245
Re: EVERYTHING in the ignition has been replaced still missing
There are no exhaust leaks, and I've had this tune for a year now. Is it possbile for a tune to go bad, or mabey the pcm went bad?
03-20-2006, 10:33 PM
#13
Moderator
Join Date: Dec 1999
Location: Jupiter (NPB), Fl
Posts: 3,852
Re: EVERYTHING in the ignition has been replaced still missing
Flashing SES is probably due to your crank position sensor still being enabled and detecting the cam lope as a misfire.
I still have my 97 PCM for my A4 if you want to try it out, i'm a bit far from ya tho. it only has a stock tune tho
I still have my 97 PCM for my A4 if you want to try it out, i'm a bit far from ya tho. it only has a stock tune tho
03-20-2006, 10:47 PM
#14
Registered User
Join Date: Oct 2002
Location: Albuquerque, NM.
Posts: 1,194
Re: EVERYTHING in the ignition has been replaced still missing
Have you checked for vac leaks yet? All the intake manifold vac lines and also make sure your EGR is not stuck open or not functioning improperly. You also said it got worse after a set of plugs. Is it possible you may have cracked a plug while putting them in? Been there done that. How does it idle? Is it worse under load vs cruise? Does it do it at any speed/rpm? Just looking for more info.
Ken R.
Ken R.