chrisorbics
03-10-2015, 09:10 PM
OK this car has been driving me nuts. I have a misfire on my 1993 dohc 5 speed stealth. I have the check engine light on most of the time. It is on for cylinder 1 and 4 misfire and another for the injectors. It sometimes runs good for a few minutes and then runs bad. It looses spark on cylinder 1 and 4 which are on the same coil. I have swapped the coils (no change), changed the ignition module that everyone has issues with, and change the ecm capacitors. The car still runs the same. The other day it was intermittently running good.
When it does not start it cranks like the ignition and/or injector timing is off.
Today is was running on 4 cylinders on startup and then after running for awhile it start firing on all 6. I checked to confirm both spark and injector pulse. As it was running good it would have an occasional misfire at times then loose spark on 1&4 and then go back to running perfect. I have power at the coil and the injector even when it starts misfiring.
A friend of mine that has a shop and 40 years experience said that the trigger for the injector pulse and ignition is through a ground and that if I have power even when the car is misfiring that the issue must be on the other side of the circuit.
I am not sure where to go from here. I am leaning toward wiring or the ecm but I do not want to just throw parts at this car. I want to figure out what that issue is.
Has anyone had a similar problem?
When it does not start it cranks like the ignition and/or injector timing is off.
Today is was running on 4 cylinders on startup and then after running for awhile it start firing on all 6. I checked to confirm both spark and injector pulse. As it was running good it would have an occasional misfire at times then loose spark on 1&4 and then go back to running perfect. I have power at the coil and the injector even when it starts misfiring.
A friend of mine that has a shop and 40 years experience said that the trigger for the injector pulse and ignition is through a ground and that if I have power even when the car is misfiring that the issue must be on the other side of the circuit.
I am not sure where to go from here. I am leaning toward wiring or the ecm but I do not want to just throw parts at this car. I want to figure out what that issue is.
Has anyone had a similar problem?