How do i test a coil pack?? Please help, I need to have the car up and running by the big race this sunday. Left Key in on position for few min with e-manage,

 

is it misfiring? one visual way to tell is to look for a melted area 90degrees from the harness plug on the coil. almost all are visable by moving wiring around and removing the front engine cover. a small bubble just means it heated up, a big one means it is failed or close to it. if you have a multimeter, you can test continuity between pins 2 and 3 on the ciol itself. they are not numbered on the coil, so just test the center and each outside pin. one will give you a resistance value and the other will show 0. if it doesn't, then it is toast.
if your car isn't misfiring, don't even lift the hood, lol. when they go it is usually very apparant with smoke coming from them.

 

if its misfiring, a CEL should come on. If it does, i suggest taking it to autozone so they can check it with an OBD scanner to make sure that its a misfire and to narrow it down to which cylinder is misfiring. From there you can determine where to look. I had an engine misfire, found out it was cylinder 3, and when i looked at the coil on cylinder 3, it had bubbled up. You should be able to tell if its deformed.

 

it is a cyl misfire code, i did check it, i didnt see any bubbles in the coil but im going to check them further tomorrow.

 

i have had horrible misfires dropping 2 and 3 cylinders and rarely got a cel from the ecu. if i did it was only for the po300, multiple engine misfire.

 

Sherv....testing the coil pack is pretty easy. Start the car...if it sounds like its running on less than 6 cylinders (stuttering), then a coil pack or two or three are bad.

It's also easy to visually inspect the side of the coil pack...poke a flashlight in there, and you can easily see the blister on the casing if its toasted.

If its left in the on position for a couple minutes, I doubt its damaged.

Interestingly enoughly enough, I spoke to Kenji at SEMA about the coil pack issue and he said that it must be a intermitted problem with only certain cars. Becuase both himself, and his R&D counterparts could never replicate it in their testing. He told me he left his key on for 2 HOURS....and nothing happened. Go figure...becuase I know at least two people that have had them damaged with the key in the on position.

 

Just put your tongue on the end of the coil and get a buddy to turn the key...you will know quickly if it is good or not.

 

Ouch...I did that when I was 7 years old. I have since found better ways to test spark plugs and coil packs.

 

I am thinking a coil pack might make a person jump a little higher than a 9 volt

 

yup it was the coil pack on cyl 4 replaced it and car is running like a dream.

 

bump looking for help tested my coil packs. Tested with a multimeter three reading the same continutiy and the others three are not showing the same. All three are various. But the packs have no marks on them.... is that typical?

 

funny little story, i had my motor sitting outside for a while, so when i was going to put it back in and start it, i decided to take all the spark plugs out and make sure no water got in the cylinders, my friend Eric was standing by the hood to see if any water came out, he was about a foot from the closest coil pack, it jumped through the air and shocked the hell out of him, i was laughin soo hard......