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Check spark at spark plug using a spark tester and fuel pressure at the rail when it acts up. If the pressure is ok at the rail, but the injectors aren't firing, that can point to a bad computer.If the fuel pressure is present but the spark is not being supplied to spark plug wires to spark plugs, then an ignition module might be in need of replacement (the metal plate the coil packs sit on). If the engine has a service engine soon light before it dies, maybe check the codes that should be stored in the computer using an OBD-I scanner.
If this is like the one I did,(you dont say which engine you have) I remove the bracket the alternater sets on.You then can have access to the back part of the engine.Remove the battery pos. wire so you dont have sparks if you touch the pos wire on the alternator.You might want to change the back spark plugs while the bracket is moved.
Johnny, It's probably the coil pack. If you follow the spark plug wires backwards from the plugs it will lead you to the part(s). There may be more than one. Check with the local autoparts place to see if they can test it for you. If not I would try a Junk yard first, incase that isn't the problem.
Sounds like a ignition control module failure. Check for spark at a spark plug wire. No spark then suspect module failure. Good spark-- Suspect possible fuel delivery problem. If spark is good then fuel pump may have failed.
I have no spark. Changed the CSS and still no spark. I also changed the Coil packs with a junk yard 1. Does anything else control spark other then ECM?
Thanks
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