new (to me) '86 with a starting problem
Thread Starter
2nd Gear
Joined: Aug 2010
Posts: 2
Likes: 0
new (to me) '86 with a starting problem
Hello all,
About a month ago, I purchased my first ever 'vette (and, interestingly enough, my first used car as well). Altogether, its been a great car, but in the last week or so I've been having some starting issues I was hoping somebody could help me with.
The car turns over fine, and then sort of starts (very low idle, around 400-500). It then promptly dies. This happens every time on a cold start (and quite a few hot starts as well) until it give it a bit of throttle when I turn the key. If I let go of the throttle before I get into gear, the car usually dies. However, as soon as I get into gear and start driving, the car has no problems.
My first thought was that the battery was running out of juice (and was running just off the alternator when i gave it some gas), but my multimeter shows 12.4v on the battery and the dash shows 12.3v, so I'm not so sure of that any more.
Any help would be greatly appreciated!
About a month ago, I purchased my first ever 'vette (and, interestingly enough, my first used car as well). Altogether, its been a great car, but in the last week or so I've been having some starting issues I was hoping somebody could help me with.
The car turns over fine, and then sort of starts (very low idle, around 400-500). It then promptly dies. This happens every time on a cold start (and quite a few hot starts as well) until it give it a bit of throttle when I turn the key. If I let go of the throttle before I get into gear, the car usually dies. However, as soon as I get into gear and start driving, the car has no problems.
My first thought was that the battery was running out of juice (and was running just off the alternator when i gave it some gas), but my multimeter shows 12.4v on the battery and the dash shows 12.3v, so I'm not so sure of that any more.
Any help would be greatly appreciated!
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
Can you hear the fuel pump energize to prime the fuel system when you turn the ignition key to "ON"?
If not I'd suspect the fuel pump relay.
If you hear it I'd suspect the Cold Start Injector or the fuel pressure not holding. Check the fuel pressure with a fuel pressure gage screwed on to the fuel rail at the regulator.
Jake
If not I'd suspect the fuel pump relay.
If you hear it I'd suspect the Cold Start Injector or the fuel pressure not holding. Check the fuel pressure with a fuel pressure gage screwed on to the fuel rail at the regulator.
Jake
Team Owner
Joined: Mar 2001
Posts: 54,124
Likes: 30
From: Cincinnati, Oh USA
First, find out if there are any error codes stored. Next, your alternator is not working, engine running, your dash voltmeter should read 14.3 volts engine cold and this will drop to 13.3 volts when the alternator gets to its operating temperature.
Team Owner
Joined: Jan 2003
Posts: 20,335
Likes: 264
From: Summerland B.C. Canada
Does sound like the fuel pump may be running off the oil pressure switch. Does the pump run for 2 seconds when ignition is switched to "run".
http://members.shaw.ca/corvette86/En...ButWontRun.pdf
http://members.shaw.ca/corvette86/Co...0View%2086.pdf
http://members.shaw.ca/corvette86/Fu...mDiagnosis.pdf
http://members.shaw.ca/corvette86/En...ButWontRun.pdf
http://members.shaw.ca/corvette86/Co...0View%2086.pdf
http://members.shaw.ca/corvette86/Fu...mDiagnosis.pdf
Thread Starter
2nd Gear
Joined: Aug 2010
Posts: 2
Likes: 0
This was the problem. The voltages I gave were with the engine off (which I presumed was the best way to test the battery). However, after exhausting all other options, I had autozone test the alternator. Sure enough, the regulator was messed up. Got a new alternator, and havent had a problem since.
Thanks so much for your help!
Thanks so much for your help!
