89 Corvette won't restart after running

[a1vetteman]

I have an 89 Corvette that will not restart after running. I spray starting fluid into the runners and it starts right up and stays running. Anybody have any ideas?


Fuel Pressure 42lbs, timing is perfect new plugs wires cap and rotor. Also, no codes.

[blkvette94]

any codes?
last time cleaned injectors?
not sure if 89 has cold start injector-- might be an issue?

spark good?

fuel pressure on start up?

[Tsavo85]

Could also be leaking injectors causing a 'flood.'

Check the fuel pressure at the rail for 15 minutes after shut off. Check at 5 minute intervals.

[2tone brnz85]

timing maybe

[wrecker3]

My 1989 Corvette had the same problem. First my fuel pump was bad. I changed the pump, screen and filter. After that it would start it would shut down. I found the the # 7 injector was shorted 3.2 ohms (should be around 16 ohms).
I disconnected the # 7 injector and the engine will start and keep running. So next i am going to order a set of Bosch IIIs from F.I.C.

[a1vetteman]

Originally Posted by Tsavo85

Could also be leaking injectors causing a 'flood.'

Check the fuel pressure at the rail for 15 minutes after shut off. Check at 5 minute intervals.

So should the fuel pressure remain the same?

[Tsavo85]

Originally Posted by a1vetteman

So should the fuel pressure remain the same?

I think you should get less than a 50% drop in pressure at 20 minutes.

I have not tested my new Bosch Gen III's, yet to see. But I'll try to remember to post my OEM numbers when I get home.

[onefinecar]

My 88 has the same problem. Does your car still have the original injectors in it? If you hold the gas pedal to the floor after the car is warm, does it start then? If so, you probably have a leaking injector and the computer thinks the engine is flooded. New Bosch III's should cure the problem.

[a1vetteman]

Originally Posted by onefinecar

My 88 has the same problem. Does your car still have the original injectors in it? If you hold the gas pedal to the floor after the car is warm, does it start then? If so, you probably have a leaking injector and the computer thinks the engine is flooded. New Bosch III's should cure the problem.

I will try that and see what happens. I will only run the car about a minute, shut it down then it wont restart. Will post my results...thanks!

[wrecker3]

Check for shorted injectors. Should be 16 ohms each.

[-=Jeff=-]

Originally Posted by blkvette94

not sure if 89 has cold start injector-- might be an issue?

89 does not have the Cold start injector

Lots of good suggestions here.. I too agree it could be injectors

[Tsavo85]

My leaking injectors went from 37 psi at run/prime to 18 psi in a half hour.

Have not tested the new Bosch III's, yet.

[Black89]

My 89 had the same problem. I put in some new injectors because they didn't ohm within spec when hot.

If the computer reads the wrong ohms on the injectors, it will shut the drivers down for self preservation reasons. Or so I've been told.