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Hi Jennifer;
You didn't say what vehicle this is so just check what applies.
If you have spark, and you have fuel, the odds are that it should fire.
Check the spark from the coil output wire.
Check the distributor cap and rotor.
Check the spark plugs.
If they are all OK, you will need to check the fuel supply. Possibly a clogged fuel filter, water in the carb, things like that. Remove the air filter and spray a small amount of starting fluid (ether) into the carb. If it starts but then stops, you have a fuel supply problem.
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You need to test the output of the wiring harness. Sometimes the wires degrade and you won’t get spark. Best thing to do is crinkle the wires around with your hand while it’s running and see if it changes the idol. If it does that’s your problem.
You said you changed the coil pack and the wires but didn't mention the plugs. Try moving one of the plugs to a different cylinder and see if the miss follows it. It could also be the ignition module. (the thing the coil packs mount to.)
Hello! There is a wiring multiple between the four coils of the Red and Black
(+12 and Ground) wiring that may have opened up during the head replacement...On Coil #1...Pin #3 is a Red wire and on Pin #2 is a Black wire...It is the same on Coil #2...Using two safety pins...Push the points into the Red and Black wires...First on coil #! then #2...Set your meter to read 12 volts...Clip the (+) meter probe to the safety pin in the Red wire and (-) to the Black...Turn on the key...12 volts must be present...You can check the other two coils that are firing...More than likely those two will read OK...This is a preliminary test to insure #1 & #2 have the proper voltage...Send a comment with results and I'll take it from there...Guru...Saailer
remove 1 of the spark plug wires and ground it, to see if any fire is coming from it, if none , then , i would remove the coil and look it over , to see if it doesn't have any cracks in it, and sometimes , we can get a part , that might have been returned to the parts store, and the part didn't perform right, so again i would chech out the coil 1 more time. also you can check the start relay located under the hood on drivers side in a black box, where fuses and relays are located.
Hello, I would test the Ignition switch. There are contact points inside the switch and actually both the Run and Start positions on the switch put power to the coil.
If you disconnect the power wire at the coil (ignition post) you can test the wire from the Keyswitch.
Then unplug the Tickler wire on the starter Relay and the starter will not turn while you test the Keyswitch.
Hook up a testlight or voltmeter, get in the cab and turn the Keyswitch to Run and I'd bet the ignition wire is dead. If there is steady power at the ignition wire, either your coil or Module is bad.
When you turn the Key to Start, it should have power at the Ignition wire and I also bet it is dead until you get that bounce of power when you release the Key.
I got a 99 Intrigue, I had a similar problem with mine, it had to do with the alternator plug and the red thick wire that was loose.
Check the positive wire coming from the battery to the alternator and from the battery to the fuse box for tight contact and corrosion. If all connections seem fine, take vehicle to AutoZone or similar autoparts and have charging system tested. They will do it for free.
hate to be the one to say this but possible trans slip how many miles before you changed the fluid most autos with automatic trans require a trans service every 24,000 miles and it is critical in most new cars today sorry......
Problem could be as simple as a vacuum leak around either of those cylinders. A vacuum leak can create a lean fuel mixure condition resulting in a miss fire. One thing to rememeber is that depending on the style of ignition in use. The opposing cylinder's spark plug and wires act as the return path for the unused voltage from the coils firing which is why you are having seemingly unrelated misfires. If either has a problem then the symptoms are shown in both cylinders.
Sometimes your plug wire go out. Try swapping 1 plug wire to another. In other words, the one the firing, put that plug wire on the one that is fireing. You might have to buy a set of wires.
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