85 fuel problems
Thread Starter
Intermediate
Joined: Jul 2004
Posts: 48
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From: Hamilton Square New Jersey
85 fuel problems
I am in the process of reviving a neglected 85 corvette TPI. Having problems with a "no start" condition. Engine fires for split second. Fuel pressure is good (40psi),Have good spark,injector wires flash noid light. It seems that the injectors are not flowing fuel. I have a hard time believing all 8 injectors are bad. I don't want to buy a set of injectors without exhausting all options. Any suggestions will be appreciated.
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Joined: Dec 2000
Posts: 17,551
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From: El Paso Texas
=kevettom. I have a hard time believing all 8 injectors are bad.
So do I. And given that you have solid fuel pressure, I'm questioning whether this is fuel related at all.
Spray some ether (starting fluid) down the throttle body and see if she lights off. If not, let's start looking at either an ignition or a timing issue.
Given that the noid light is lighting up, the injectors should be firing. Have you pulled the plugs to see if they're wet?
Has this vehicle been sitting for an extended period of time, or did the no start condition appear suddenly? During extended sitting periods, gasoline does deteriorate, and it could simply be spoiled fuel or water in the fuel. If it suddenly quit running, I would start looking at an ignition or timing issue.
Do you have any codes stored in the ECM?
Try the starter fluid and see if it fires and runs....and then we can go from there.
They really only need 4 things to run.....the correct fuel and air mixture, sufficient compression, correct timing (valve and ignition), and a sufficiently strong spark to light the mixture. Everything else is icing on the cake.
Time to isolate which factor is amiss.
Last edited by Frizlefrak; Jul 12, 2005 at 02:56 AM.
Thread Starter
Intermediate
Joined: Jul 2004
Posts: 48
Likes: 0
From: Hamilton Square New Jersey
Thanks for the info. Turns out, I replaced the injectors with another set and it fired right up. One for the books for me.
Originally Posted by Frizlefrak
So do I. And given that you have solid fuel pressure, I'm questioning whether this is fuel related at all.
Spray some ether (starting fluid) down the throttle body and see if she lights off. If not, let's start looking at either an ignition or a timing issue.
Given that the noid light is lighting up, the injectors should be firing. Have you pulled the plugs to see if they're wet?
Has this vehicle been sitting for an extended period of time, or did the no start condition appear suddenly? During extended sitting periods, gasoline does deteriorate, and it could simply be spoiled fuel or water in the fuel. If it suddenly quit running, I would start looking at an ignition or timing issue.
Do you have any codes stored in the ECM?
Try the starter fluid and see if it fires and runs....and then we can go from there.
They really only need 4 things to run.....the correct fuel and air mixture, sufficient compression, correct timing (valve and ignition), and a sufficiently strong spark to light the mixture. Everything else is icing on the cake.
Time to isolate which factor is amiss.
Spray some ether (starting fluid) down the throttle body and see if she lights off. If not, let's start looking at either an ignition or a timing issue.
Given that the noid light is lighting up, the injectors should be firing. Have you pulled the plugs to see if they're wet?
Has this vehicle been sitting for an extended period of time, or did the no start condition appear suddenly? During extended sitting periods, gasoline does deteriorate, and it could simply be spoiled fuel or water in the fuel. If it suddenly quit running, I would start looking at an ignition or timing issue.
Do you have any codes stored in the ECM?
Try the starter fluid and see if it fires and runs....and then we can go from there.
They really only need 4 things to run.....the correct fuel and air mixture, sufficient compression, correct timing (valve and ignition), and a sufficiently strong spark to light the mixture. Everything else is icing on the cake.
Time to isolate which factor is amiss.
Thread Starter
Intermediate
Joined: Jul 2004
Posts: 48
Likes: 0
From: Hamilton Square New Jersey
Replaced all injectors. Problem solved. Thanks to all.
Originally Posted by kevettom
I am in the process of reviving a neglected 85 corvette TPI. Having problems with a "no start" condition. Engine fires for split second. Fuel pressure is good (40psi),Have good spark,injector wires flash noid light. It seems that the injectors are not flowing fuel. I have a hard time believing all 8 injectors are bad. I don't want to buy a set of injectors without exhausting all options. Any suggestions will be appreciated.
