Ideling problems! please advice
Thread Starter
Melting Slicks
Joined: Jul 2004
Posts: 2,295
Likes: 14
From: Grand Sport #82
Ideling problems! please advice
My 87 has some trouble idling now and then.
When I fire it up it sometimes dies right away, if I dont get on the gas pedal. I then have to sit and keep the rpms at like 1200 to keep it alive. Then after one or two minutes it will usaully idel fine at about 600 rpm.
When I get on the gas and wait for hear to idle there is a smell of gas from the exhaust.
What is my problem here?
When I fire it up it sometimes dies right away, if I dont get on the gas pedal. I then have to sit and keep the rpms at like 1200 to keep it alive. Then after one or two minutes it will usaully idel fine at about 600 rpm.
When I get on the gas and wait for hear to idle there is a smell of gas from the exhaust.
What is my problem here?
Racer
Joined: Mar 2005
Posts: 300
Likes: 0
From: Mountain View CA
I had this EXACT problem. 88 l98. I tried replacing fuel pump, filter, MAF, and a bunch of other parts. Nothing helped. Brought it to an expert who quickly figured out it was an idle control adjustment way out of whack.
Thread Starter
Melting Slicks
Joined: Jul 2004
Posts: 2,295
Likes: 14
From: Grand Sport #82
Originally Posted by MARDAG
I had this EXACT problem. 88 l98. I tried replacing fuel pump, filter, MAF, and a bunch of other parts. Nothing helped. Brought it to an expert who quickly figured out it was an idle control adjustment way out of whack.
I have just ordred new IAC hope that helps....
Racer
Joined: Mar 2005
Posts: 300
Likes: 0
From: Mountain View CA
Yes. I meant IAC. On second reading of your post, I noticed the difference between our problems is that mine had a perfect cold start, and would have idle trouble after reaching normal running temp. (weird, huh?) If yours is idling badly at cold temps, could be same problem, but perhaps not...The IAC should help no matter what. DON'T let anyone tell you to replace the MAF or anything else expensive until you've taken it to a shop and had them do a workup on their fancy computers. The place I took mine was able to tell immediately just what was wrong with the fuel/air mixture and when.
Le Mans Master
Joined: Aug 2005
Posts: 5,002
Likes: 5
From: No Opti Here Tn
St. Jude Donor '06
Idling
I had the same problem with my 86 coupe and after throwing lots of parts at it (O2 sensor, plugs wires etc) it was 3 injectors that were bad
replaced all 8 found online Accel for $200.00
I would still check fuel pressure etc ( the stuff you can test cheap)
Good luck
replaced all 8 found online Accel for $200.00
I would still check fuel pressure etc ( the stuff you can test cheap)
Good luck
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
Help is on the way. I just mailed the C4 Maintenance manual by Chris Petris to you today. Your problem is covered in the fuel injection. PCV and ECM sections plus others. You may have multiple causes for the problem. Hope this helps!
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Safety Car
Joined: Dec 2004
Posts: 4,088
Likes: 0
From: Poop land
For some reason, when its rainy outside, my car does the exact same thing. I don't worry about it and just give it a little extra gas on start up. On sunny days, it starts right up, as always! Thanks to my new injectors and tuning!
Advanced
Joined: Feb 2005
Posts: 78
Likes: 0
Originally Posted by MARDAG
Yes. I meant IAC. On second reading of your post, I noticed the difference between our problems is that mine had a perfect cold start, and would have idle trouble after reaching normal running temp. (weird, huh?) If yours is idling badly at cold temps, could be same problem, but perhaps not...The IAC should help no matter what. DON'T let anyone tell you to replace the MAF or anything else expensive until you've taken it to a shop and had them do a workup on their fancy computers. The place I took mine was able to tell immediately just what was wrong with the fuel/air mixture and when.
. Any help would be much appreciated, I just wanna make sure I do things right, and not make things worse.
Safety Car
Joined: Dec 2004
Posts: 4,088
Likes: 0
From: Poop land
Oh man, on your last post, you said your MAF might be kaput. Code 33 means there's something going on with the MAF. Did you replace it yet? I wouldn't get Bosch if I were you. Get the non-wire type from Microtech. Its half the price and probably more reliable because there is no wire on it. Let us know what you think of it. Oh and BTW, did you change those MAF relays yet??? Good luck man, I had the problem about 2 months ago and now my Vette is fine, EVEN with a Superram Intake manifold.
Thread Starter
Melting Slicks
Joined: Jul 2004
Posts: 2,295
Likes: 14
From: Grand Sport #82
Originally Posted by 94ZR1
I had the same problem with my 86 coupe and after throwing lots of parts at it (O2 sensor, plugs wires etc) it was 3 injectors that were bad
replaced all 8 found online Accel for $200.00
I would still check fuel pressure etc ( the stuff you can test cheap)
Good luck
replaced all 8 found online Accel for $200.00
I would still check fuel pressure etc ( the stuff you can test cheap)
Good luck
Thread Starter
Melting Slicks
Joined: Jul 2004
Posts: 2,295
Likes: 14
From: Grand Sport #82
Originally Posted by corvetteronw
Help is on the way. I just mailed the C4 Maintenance manual by Chris Petris to you today. Your problem is covered in the fuel injection. PCV and ECM sections plus others. You may have multiple causes for the problem. Hope this helps!
If it would be possible. I would send you a Turborg for your help
4th Gear
Joined: Jul 2005
Posts: 4
Likes: 0
hard start, idle
My 87 starts hard. cranks for 10 to 20 seconds before it starts and after it starts the rpm's go up and down (hunting) from 600 to 1400.
Seems stuck at around 1200 rpms after it warms up. I have to "kick" it down when I come to a stop, it then idles and starts hunting. I have a manual trans. Had it a week, I love it but....
Any help would be appreciated!
Seems stuck at around 1200 rpms after it warms up. I have to "kick" it down when I come to a stop, it then idles and starts hunting. I have a manual trans. Had it a week, I love it but....
Any help would be appreciated!