Engine Performance problem
1989 Chevy Camaro V8 Two Wheel Drive Manual 173000 miles
1989 Chevy Camaro RS 305 TBI, 5-speed, 173k miles.
The engine cranks but won't start. I checked fuel pressure at the fuel filter, there was none. After beating on the gas tank with a hammer the pump worked. I replaced the fuel pump, pump filter, checked the pump wiring, (continuity and connectors all good), cleaned the tank out, replaced fuel filter. Tested the pump, it works, overhauled throttle body last month, both injectors spray well. Pressure at throttle body confirmed. I can get the car started but it runs really rough, and won't idle. It feels like its running on 6 or 7 cylinders rather than 8. Load tested battery, it's good, tested alternator, also good. Tested spark at coil, good. Replaced cap, rotor, plugs and wires (8mm wires, autolite plugs gaped at 35 thou). When it cranks it gets "hung up" as if it is being physically stopped. Upon releasing the key there is a puff of smoke/gas that comes out the throttle body. If I hold the throttle to the floor and prime the intake with gas I can get it going but it won't idle, must keep on the throttle to keep it running. I've checked and double checked fireing order, also adjusted the timing while its running to get it to the best possible running position. There is no check engine light and no codes. I did notice the IAC valve "clicking" when the car is "on" and not running. Any thoughts would be very helpful.
have the same problem?
Wednesday, October 27th, 2010 AT 1:28 PM