My car has been misfiring alot lately and getting a really rough idle. This morning I changed out the fuel filter, reset the pcm, and added a bottle of lucas fuel treatment to the car. There was an improvment and the car is healthier running now but the issues are still there. At idle the car shakes, and my gauges will sometimes dim a little at idle. The spark plugs are gapped at 0.030 right now and are about a year old. I heard that copper plugs wear out quick but I didnt think it would be this quick which is why I am reluctant to change them out though it seems like the most logical next step since I dont have acess to any data logging software. Anyone else have idea's?

 

check the o-ring on the coils. I was missing one, and it was causing my misfires. only took me 6 mo to figure that out!

 

Sometimes mine idles rough too.. But it actually RUNS fine..??

 

Water intrusion maybe? Look for water around the spark plugs -- there is a factory bulletin out for water causing a rough idle.

 

Excessively dirty throttle body?

 

I will look into that and see when I change the spark plugs out.

Yeah, for the most part the car runs fine at other than idle

last time i checked my plugs they didnt look wet at all. do you know whats causing the water?

just cleaned it about 8 months ago, i guess i could check it again, I do want to still flush my coolant and change my oil since when it was snowing a few months ago i lost a quart of coolant somewhere and after i refilled it it stayed ever since then but I was runnign the car really hard when it happend. I'm also gonna have to check my air filter. I think a failing fuel pump may also be a possiblity.

 

where would you check for that/ get a replacement ring for it ? i might have a similar issues

 

anyone know of a better plug I could be using, Im not too happy that these plugs barely lasted a year if they end up being the problem. When I looked at them they didnt seem fouled up and black, just normal usage to me but maybe something i cant see went wrong with them.

 

iridium

 

ngk LTR7IX-11 or equivelent will work.. I have a sheet someplace with the plugs to use for boost

 

Were new plugs recently released? Because when I did mine last time, the LE5 was still new-er. So there weren't many options..

 

already tried iridium and it was terrible.

are those the same heat range as stock? Ive been thinking that the 1 step colder I have might not be neccesary.

 

they're one step colder.. I know someone using them for a 270 hp nitrous setup


I'm going to run champion 430s on my setup..

 

anyone have any ideas about what might be wrong with my car. sprayed a 75 shot, traction control lights started flyin (was already going 60 so shouldnt have spn tires) and same with check engine and now its only runnin on 3 cylinders. think its the piston or rings or someting but havnt ripped it apart yet not lookin forward to it if anyone knows or has had the same issue let me know send a private message or something thanks

 

Way to thread jack. Wow, that's so far off topic.

 

clearly that discussion has been over for more than a month didnt think they would mind chief

and ment to put somethin in there about my plugs but forgot. jacka$$ at auto parts store gave me hotter plugs instead of one step colder

 

Yeah ok that discussion was still going on today GTFO!

 

This thread was made 5 days ago....

Just make a new thread for your issue. New thread is always better to make.

 

Ahhhh was lookin at the join dates. dont know how new on here, someone told me to come on here with my problem cuz the people were wizards with these things and i dont wanna go to the dealership and get slapped across the face

 

Probably fried your rings. What kit were you running? Dry or wet shot? More info you give us, the more we can help you.

 

i have everthing dyno tune, was model specific and had good reviews for the balt so got all that. used it for a while no problems then was doin a 60 roll hit it over 3500 and let off before redline then got on it again over 3500 after about 3 seond heard a click or something and lights started goin off and i let off then ulled off the road and 2 spark plugs were fowled and put the old ones back in and its only runnin on 3 cylinders. checked to see if they were all arkin and they were and checked if i could see any burned holes in the top of the pistons and there werent and did a ghetto compression test with my hand and the one feels a little low but havnt done a real one yet

wet shot

 

how much boost are you running?

 

???? no idea my boost gauge was supposed to come in this weekdn but it's still on backorder

 

i picked up a new o-ring at the hardware store. it's bound to happen if you're swapping new plugs in often. especially during tuning phase, i fried quite a few plugs. that o-ring is a sneaky little bastard.

if you go to the dealer they claim the o-ring is part of the coil and your are SOL and need to buy a new coil. ****'em i say.

 

mine is idling rough too..i thought it was the plugs also so i replaced them..i brought mine to autozone cuz my check engine light popped on and a multiple misfire code came up..he reset it and it didnt come on agais since then but it is still idling rough as hell..this i was told it was an o2 sensor but i keep getting told its too early for that to go bad with the mileage i have