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91 Miata Misfires. Change coil pack. still misfires. what could be other possibilities why

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Have a 1994 nissan altima.shakes real bad till about 20mph then rides smooth till i come to a stop.also it was driven through high water.

Posted on Jun 08, 2009

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Oil filter might be clogged or your engine could be getting too much gas...check your spark plugs too...

Posted on Jun 03, 2009

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What causes engine misfires to stay after new plugs and coil packs?


Try swapping the coil packs around - like swap #1 with #2, and swap #6 with #5, see if the misfires MOVE with the coil packs swapped to the new cylinders or if they stay with the cylinders. If they move with the coil packs, the new coil packs are bad. If they stay with the cylinders, there's a problem with those cylinders. You DID replace that camshaft sensor, right?

Have you checked your #1 and #6 injectors?

Aug 07, 2014 | BMW 528i Cars & Trucks

1 Answer

Number five plug not firing


I'm assuming this is a DIS(distibutorless ignition system).If it is,the most common cause is a defective coil pack.Each coil will fire a pair of cylinders together on 4 and 6 cylinder engines(one "waste" spark,one to ignite the mixture).Try swapping the wires at the coil pack to see if the misfire follows the coil tower,or the same cylinder misfires(keep in mind that a check engine light means you will have to clear the code to get the computer to feed that cylinder fuel before you start it up again).If the other cyl on the pack now misfires(i believe 1+5 are on the same pack on a Ford engine),then the coil is bad(spark is "leaking"to ground).If the same cyl still misfires,try swapping a wire+plug from another cylinder.

Mar 14, 2012 | 1996 Mercury Cougar XR7

1 Answer

My 91 eagle talon won't get a spark it just cranks


try crank position sensor.cam sensors are mostly for monitoring misfires. cam sensor doesnt determine spark timing

Dec 17, 2011 | 1991 Eagle Talon

1 Answer

97 blazer is missing from take off at 1000rpm to 2000 then clears out code reader says o2 sencor and multable engine missfire


For the misfires, start by pulling your plugs. They either need to be cleaned or replaced if questionable. Then, you may have a bad coil or coil pack. You can test them with a multi-tester-you'll want resistance values that are specific for your vehicle. Alternatively, you can switch the coil packs around (if you know you have a good one from knowing which cylinders are misfiring and which are firing o.k.) If your misfires change cylinder numbers from swapping, you know you had a bad coil. Other possibilities for misfire could be the electronic ignition module or the pick-up coil inside the distributor(if you even have a distrib.)
FYI: code for o2 sensor means that circuit has a malfunction, may be the sensor itself, or a wiring problem. Good luck.

Oct 12, 2011 | 1997 Chevrolet Blazer

1 Answer

I have a misfire in 1 cylinder I had just bought spark plugs and wires I went back and reguaged them all and it still has a misfire what else could it be I have a 2001 Mercury sable.


It could be a coil pack. Follow the wire from the spark plug back to the coil pack. each one should run two cylinders. Switch the coil pack with a different one and see if a different cylinder misfires. They are easy to change, just 2 7mm screws hold each one on.

Jul 10, 2011 | 2001 Mercury Sable

2 Answers

Motor is skipping, lacks power,ck eng. light is


A flashing light means you're actively misfiring. Have the ECU scanned to find out which cylinder it is. Bad coil packs are common and there is a recall for them. Call a dealer with your VIN number and if yours qualifies, you'll get four new ones free. If not, buy a coil pack for each cylinder that is indicated as misfiring and replace them. They're $35 at AutoZone and about $160 at an Audi dealer.

May 15, 2010 | 2000 Audi A4

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Mazda Miata: Replaced the coil pack because of misfires, that fixed misfires. Now the check Engine light comes on and the code was related to Cat Convertor. The car get hot around the console and gear...


The cat converter was trying to burn all of the excess fuel that was being sent out of the exhaust due to the misfire, got way to hot and melted the inside of the cat. I experimented with this while in tech school. You can burn up a cat in about 15 minutes at around 3000 rpm with a single cylinder misfire. I also work at a shop that specializes in miatas, and have seen this before. Get a new catalytic converter.

Jun 22, 2009 | 2000 Mazda MX-5 Miata

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