Bad take off and driving

KENNETH SARSYCKI

MEMBER
1987 CHEVROLET CORVETTE
0.5L
V8
2WD
111,500 MILES

I replaced fuel filter and pump cleaned the MAF with cleaner. I found one hose off I can not check for codes my dash is all not working. If after it warms up I give it gas up and down it will start gaining more and more rpm's it will start getting better. Slowly sometimes back through intake and sometimes will almost act right sometime it will idle just fine. The next time I stop it will shut off. I just got this car I do not know a lot about it or about fuel-injection. I have manual and have read about all sensor I may be better off putting on cars. And distributor?

Saturday, June 10th, 2017 AT 2:48 AM

1 Reply

HMAC300

MECHANIC
48,601 POSTS

If you cannot read the codes on dash we cannot help to much. But check fuel pressure with a gauge on Schrader valve on fuel rail should be 41-47 psi, see link. Clean throttle plate on both sides and IAC hole with choke cleaner. Check air duct going to throttle body for holes there should not be any. Then check for a vacuum leak I suspect the hose you have may be part of problem. See picture for vacuum hose routing. Check where arrow is at idle if you have a vacuum leak at the solenoid it should only have vacuum on one side and not going through solenoid. It is red and will be on frame or in engine compartment. See picture.

Image (Click to make bigger)