Engine Performance problem
1990 Buick Century 6 cyl Front Wheel Drive Automatic 63000 miles
When the engine starts, it will run rough like it is missing on several cylinders. It will also backfire thru the intake. I changed the spark plugs, cranksensor, and all four of the relays, and the coolant sensor. I checked the ohms on the injectors and five of them have 12.2 ohms and one has 8.0 ohms. With the ignition, on the pink wire of the injectors all have 11.7 volts. When I first replaced the cranksensor, the engine started and ran very good. About an hour later I tried to start the engine and it ran very rough and then stalled. Also, I had the ign module checked at a local parts store and the module passed, and they checked 3 or 4 times. I don't have enough money to change everything on this engine. Also, I keep getting a trouble code of 42, which is the spark timing circuit. I am lost on this one, please help. Thank you very much.
have the same problem?
Saturday, October 3rd, 2009 AT 6:36 PM