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1985 corvette fuel flooding issues

been working to get my car running, down to the last thing,,, the car only runs with wide open throttle,, this is due to too much fuel (flooding) fuel pressure hangs out about 38 psi, my shop books do not help, mass air flow appears to be working but not 100% sure, i checked voltage while it was running and get 1.9 to 2 volts (at full throttle which is the only way it runs) to the ECM. when first turning key on no run, the fuel pressure jumps to 40psi for about 2 secounds and then droppes to about 35,,, when trying to start the car it dosen't appeare to drop, which i thought it should.

any ideas would be much appreciated!!!

Reply to
mboyer
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Check out the injectors...extra fuel should return to the tank and injectors should only open when required...someone on the CORVETTE FORUM can help you out.

Reply to
grayfox

could this be a vacum issue as well. I checked the vacuum at the rear of the plenium and it doesn't appear to have vacuum,, which is what controlls the fuel pressure regulator. any idea what the vacuum should be reading. thanks

Reply to
mboyer

It could be a number of problems. Could be anything from a stuck injector to a bad coolant temp sensor. A scan tool would help. The mass air sensor doesn't make a difference until the system goes into closed loop mode after reaching operating temperature.

I'd start by unplugging all the injectors (including the cold start injector) and seeing if it will fire. If so, then one is stuck or leaking. If not, then it could be a bad throttle position sensor, one of the coolant temp sensors, air temp sensor, etc...

-rev

Reply to
The Reverend Natural Light

You won't have any vacuum at wide open throttle. That's perfectly normal.

Reply to
Steve G

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