1984 Corvette Rough idle
#1
1984 Corvette Rough idle
1984 Corvette that'* been converted to a 1986 Tuned Port Injection, converted the ECS and all the wiring. The engine idle varies as much as 200 RPM, but usually closer to 100 RPM.
#2
Senior Member
Certified GM nut
Welcome to GMF! Sounds like a vacuum leak. Check all the vac hoses for cracks, or bad gaskets. If its not that, it could be spark plugs or wires getting bad.
#5
Yes, but that TPI is used along with the fuel pressure regulator. I seems fine at anything above idle, also, no codes. Could there be something with the fuel pressure regulator?
#7
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test the fuel pressure but a rough idle is generally a vacuum leak i would b checking for gasket leaks worked on a 73 vette that had a loose intake manifold. do you have a idle air control on the throttle body?