I've changed out both coiles and all 4 spark-plugs and all wiring, and my '98 Kia Sephia still runs rough. Computer says that 2nd piston is misfiring. What could be wrong? Could it be a computer problem?
2007-01-07 13:08:50 · 7 answers · asked by Danny D 1 in Cars & Transportation ➔ Maintenance & Repairs
Could be lots of things. Broken piston ring, burnt valve, you name it. Sounds like you need a pro.
2007-01-07 13:16:19 · answer #1 · answered by Mr. Peachy® 7 · 0⤊ 0⤋
It is possible to get bad wire or bad spark plugs or the wrong spark plugs. It is not that common through, it is more common to get the wrong spark plugs or mix up the spark plug wires. But you can not miss wire just one spark plug wire, and with the coil packs per cylinder one would really have to work to miss wire it. So I am assuming that you have a Ford Explorer with a rotary distributor, and either a 6 or 8 cylinder engine. Tell your husband the problem and have him recheck his work. Get out your owners manual and make sure you have the right spark plug for your vehicle. Verify that the spark plugs are proper and securely fitted, that the spark plug wires are securely fitted, and that the wires are wired to the right plug. depending on what year of ford you have this should be very easy to do but you will have to know the firing order. Get a repair manual from the library or look it up via the Internet normally the firing order will have a diagram that show how the spark plug wire run. If all seems in order or this is beyond our ability then visit a reputable garage or ford dealership. You do not want to drive if avoidable, you may cause more severe damage. Best of Luck
2016-05-23 06:27:00 · answer #2 · answered by Mary 4 · 0⤊ 0⤋
Since we don't have the car here, I can attempt to give you a diagnosis based on what you state.
1. You spent more money trying to avoid taking your car to a shop to get an educated diagnosis than what the shop would have charged.
2. To find the correct diagnosis, you will still wind up taking your car to a shop to get it checked out.
3. I doubt it is a computer problem as computers RARELY go bad.
4. You most likely have an injector problem that may require replacement OR you may be able to use injector cleaner to correct. No, this doesn't mean buy that crap in a can that costs a buck ninety-nine at Autozone that you dump in the tank. I mean go to a shop that hooks the engine up to a can of cleaning solution and runs your car on it. It costs about $80 parts and labor to do but it is a strong concentration of cleaners. The tank crap gets diluted in the gas and doesn't work.
And for those of you posting previously stating the it could be a distributor, this vehicle uses a DISTRIBUTORLESS IGNITION and both coils were replaced.
2007-01-07 15:06:36 · answer #3 · answered by ? 6 · 0⤊ 0⤋
NEVER replace ANY part till you know the problem. It is not a computer problem. It's unusual to get a misfire code without an o2 sensor code. If you have a misfire it sets up a rich or lean condition in the exhaust and sets an o2 code. You may have a dirty injector or a distributor problem, if you have a distributor. We never receive enough info. about the problem to do a fair diagnosis. Could be an error in changing parts.
2007-01-07 14:35:46 · answer #4 · answered by tronary 7 · 0⤊ 1⤋
Your #2 piston may have carbon buildup on it causing pre-ignition. Also the fuel being sent into cylinder #2 could be too much or too little-if a fuel injector gets clogged, it could cause a miss.
2007-01-07 13:24:19 · answer #5 · answered by bm 2 · 0⤊ 0⤋
I wouldn't say it would be a computer problem but check the distributor. You might have to take it to the shop to see if the timing for firing the pistons is correct on the distributor. Hope that helps. Good luck.
2007-01-07 13:17:31 · answer #6 · answered by Ghandric 2 · 0⤊ 1⤋
needs a tune up
2007-01-07 13:28:08 · answer #7 · answered by John B 4 · 1⤊ 0⤋