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1990 900 S Runs rough Posted by BAAB [Email] ![]() ![]() ![]() |
a 1990 900 S
the check engine light is on and the shift up light is flashing. I have swaped out theECU, AMM, fuel pressure regulator, fuel pump, and have cleaned up the main ground on the front frame of the car, and the battery is showing 12.8 volts just sitting there. Over 13.5 when running. I am not sure what to check now. It starts on the 2nd try, but it runs very rough and as soon I hit the gas, it dies. When it warms up, it doesn't die quite as easily. If I let it idle, it will smooth out, but as soon as I try to GRADUALLY give it gas so it wont die, it starts running really rough again. The only thing I haven't replaced is the plugs, wires, cap, rotor, or coil. I plan to swap those out tomorrow (gotta love a running parts car). What should be my next step if the electrical pieces are ok? MUCH THANKS!!! THIS BB ROCKS!!!
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