misfire help

[e30construction]

would a bad coil pack misfire get worse as the engine warms? trying to diagnose my m50tub25 misfire that seems to get worse as the car warms

thinking its a bad coil but could be something else

[jlevie]

A bad coil or a bad plug can be temperature sensitive. The behavior of an engine with intake leaks can also be temperature sensitive.

[e30construction]

well i went out and pulled each plug from the coil one by one to see if there was any difference but all seemed to get worse when i unplugged them as they should..i gapped all my plugs to the correct gap as well to see if there was any difference..my number 6 coil is pretty cracked up by the spark plug so it may b arching somehow

[jalopi]

Get a spray bottle that puts out a very fine mist, like for spraying plants or something. Fill it with water and spray a little bit of water on the spark system while the car is running. If you've got an issue with spark arcing and making your car run bad, it will show up regardless of the temperature. Just make sure you don't soak everything, cuz then it'll just run bad period.