Car Missfiring

[MYCEF3]

HEY GUYS! CEF IS HAVING SOME TROUBLES. BASICALLY CAR RUNS FINE WHEN I START IT UP N I CAN DRIVE IT FINE FOR ABOUT 10 MINS, N THEN IT STARTS MISSING (RUNNING 5 CYLINDERS) I CHECK ALL SPARK PLUGS, AND CLEAND THEM. RAN IT AGAIN AND SAME THING HAPPENED. ALSO THERE IS A WEIRD NOISE COMING FROM THE PLENUM/INJECTORS. NEED HELP COZ ITS REALLY ANNOYING.

[JD_CEF]

check the ignitor module that is bolted on the back of the coil pack cover

[Nightcrawler]

Take it to a mechanic .... and don't post in capital letters - it is rude to shout indoors - please use your inside voice

[Madaz]

[DSTROY]

My Ceffy did similar and i just replaced the spark plugs and gaped them down to .8mm and the problem went away. Try new plugs they only cost about $4.50 each so try that first. If it does it at idle though its a good chance that its a coil pack.

[MYCEF3]

Hahaha.... I was using my phone and it like to use capitals on posts on the net! (knew i would got a capital comment)

Yeah but they r really only new plugs though! Ill check the gapping again (sooo much fun in this weather)

And yeah once it starts missing (so far i noticed either till the engine warms up or 10-15 mins of driving) it does it on idle and on acceleration, doesnt sound it on deceleration

Sounds like its got a lumpy cam or a wrx!

And if its a coil pack normally would one just go or the lot, and the fun part how do u find the faulty coil pack?

[mr.R34]

Could be coilpacks?

[r33 chris]

sounds like coil packs

[DSTROY]

And if its a coil pack normally would one just go or the lot, and the fun part how do u find the faulty coil pack?

Usually one can go on its own. If its missing on idle you just unclip a coil pack 1 at a time. If it makes it worse then you know you have uncliped a good one. If it stays the same you have unpluged the stuffed one. If one is stuffed you might as well replace them all as they will all start to fail from old age.

[r33 chris]

yea and if its breaking down due to heat this hot weather wont be helping

[Madaz]

Brett @ Graham West Workshop can bench test your coils and tell you which one is faulty

[MYCEF3]

Cheers guys!

Might do some tests on the coil packs!

The only thing i dont get is, It runs fine when i first start her up run perfectally then all of a sudden it starts missing once engine is at running temp or 10 mins of driving!

I wouldnt be so confused if it did it all the time, constatally missfired... But it doesnt! Any ideas on that as well?

[DSTROY]

Cheers guys!

Might do some tests on the coil packs!

The only thing i dont get is, It runs fine when i first start her up run perfectally then all of a sudden it starts missing once engine is at running temp or 10 mins of driving!

I wouldnt be so confused if it did it all the time, constatally missfired... But it doesnt! Any ideas on that as well?

It would be the coilpacks getting hot and shorting out would be my guess.

[r33 chris]

sounds like there just getting to hot man, just like some can start to break down under boost

[MYCEF3]

It would be the coilpacks getting hot and shorting out would be my guess.

Hmmm... And i never thought of that! (my excuse... Iv got heat stroke LOL)

If thats the case how could i resove it if its goin to heat up no matter what???

[r33 chris]

replace them with new one's

[DamageInc]

or be a cheap'o and silicone em

thats what i did to mine

[DSTROY]

what Chris said.

Edited January 10, 2010 by DSTROY

[r33 chris]

haha yea sensor proof silcone

[MYCEF3]

Silicone sounds good right about now... Only coz i cant be fu(ked!

Well hopefully i got more $$$ my way soon... Will be handy!

Thinking of silicone as i will be doin a 30/25det conversion.... hopefully soon!