85 c4
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
Even if this is not the problem, IF you have a stock HEI, buy a new one,
when I first got mine it would die for no reason, then start up, totally unexpected
Race Director
Joined: Jun 1999
Posts: 14,924
Likes: 9
From: Merritt Ils Fl
If the check engine light is coming on, then there is some other code besides a 12. I'd go through that procedure again first. If I recall, the 12 will flash 3 times, then it will go on to other codes.
If your fuel pressure is good while you're driving, my money is on the catalytic converter being clogged. It would be a little loud, but you can remove it and test drive it to see if that's the problem without spending any money.
If your fuel pressure is good while you're driving, my money is on the catalytic converter being clogged. It would be a little loud, but you can remove it and test drive it to see if that's the problem without spending any money.
You need to revisit pulling codes.
Thread Starter
Heel & Toe
Joined: Mar 2013
Posts: 20
Likes: 0
under side of car revealed straight pipes no muffler no cat . it just dose'nt seem like its getting gas it wont die just cuts out backfires like it has the hiccups idles some what i just restart it and it will run better for a few minutes until i mash the gas hard check engine light comes on the same story all over im gonna try a new fuel pump and sending unit cant hurt it set for 2 years
Melting Slicks
Joined: Jun 2011
Posts: 2,392
Likes: 385
From: Leland , North Carolina
Race Director
Joined: Feb 2003
Posts: 16,475
Likes: 270
From: Kingman AZ
Cruise-In VII Veteran
Cruise-In VIII
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16
I am staying overnight in Franklin, Ky this Friday then spending most of Sat at the NCM. Heading back to Michigan later in the day. I could bring my scan tool and loan it to you if you pinky swear to mail it back to me. I also have a full set of test tools that will test all your sensors if you would like to borrow those too.
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Thread Starter
Heel & Toe
Joined: Mar 2013
Posts: 20
Likes: 0
I am staying overnight in Franklin, Ky this Friday then spending most of Sat at the NCM. Heading back to Michigan later in the day. I could bring my scan tool and loan it to you if you pinky swear to mail it back to me. I also have a full set of test tools that will test all your sensors if you would like to borrow those too.
Racer
Joined: May 2012
Posts: 272
Likes: 46
From: Tulsa OK
Try unplugging the mass airflow sensor and then drive the car. This will tell you if any of those parts are bad. I think my 86 was doing the samething several years ago. I unplugged the Mass Airflow sensor and it ran fine. If this works for you replace the mass airflow sensor with a new one.
Thread Starter
Heel & Toe
Joined: Mar 2013
Posts: 20
Likes: 0
not yet i set the tps took the burn off modual out of it and laid it in the seat and figured out after it resets after turning the key off it will run fine check engine light stays off untill it acts up again its got a surging idle now so im thinking iac needs replacing i think im gonna try a new ecm and burn off box