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Originally Posted by ZR1CPA
My 94 mis-fires at start up. When warm the problem goes away. I do have a 02 sensor code. However, the system is open loop when the motor is cold. Thus I do not belive that this is the problem. Also, at start up, its running a little rich. I was thinking that leaky injectors could be the problem, but, the same problem exists if I park the car for a week. I'am thinking that this is ample time for the fuel to evaporate from the cylinder. Therfore, I do not believe that a leaky injector is the problem. Any ideas?
Thanks
Jeff
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could be a cracked insulator on a plug. or a bad coil pack. check the spark by pulling a plug wire while running and use a spare spark plug, grounded against the plenum good luck!!