how to fix my misfire

02edge · July 19th, 2011, 10:10 PM

when my car idles you can hear it miss every once in a while Ive replaced plugs wires coil fuel filter tps iac and a bunch of other things what could be the cause

Green_6er · July 19th, 2011, 10:11 PM

bad gas is one

02edge · July 19th, 2011, 10:14 PM

yeah but its always done it and I usually go to hess or shell and always keep it full of premium

Green_6er · July 19th, 2011, 10:20 PM

u have a tune for premium?

02edge · July 19th, 2011, 10:21 PM

nope im waiting on my tuner to come in the mail still

Green_6er · July 19th, 2011, 10:37 PM

that could be your problem. you should only run premium if you have a tune for it because higher octane fuel burns a lil differently

Green_6er · July 19th, 2011, 10:38 PM

also what kind of plugs did u put in your car?

02edge · July 19th, 2011, 10:38 PM

autolite

Green_6er · July 19th, 2011, 10:41 PM

copper or platnium?

mustangmike! · July 19th, 2011, 10:49 PM

im betting copper,
run 87 cause thats what your computer wants, lucky you haven't fucked your engine like that ...

Next id start looking for leaks if the gas doesn't solve it

Green_6er · July 19th, 2011, 10:56 PM

well i had platniums in mine and it ran like shit so jw

RedDevilGT · July 19th, 2011, 11:31 PM

When was the last time you cleaned your MAF? Have you done a compression check?

Everett · July 19th, 2011, 11:44 PM

Vacuum leak will cause a misfire. And premium won't cause a misfire. Keep using shell gas cause it's a top tier fuel. And premium is more resistant to detonation and preignition. There is no harm using it other than making you lighter in the wallet

Green_6er · July 19th, 2011, 11:47 PM

yeah +1 for using shell, but you should really only use the fuel that your car is tuned for. and which coil did you put in? I heard from many people that the screamin demon coil packs are poop.

03SonicBoom · July 20th, 2011, 06:46 AM

I can't believe people are suggesting you change gas octane to get rid of a missfire BEFORE they suggest you change injectors. You can run premium on a stock tune and it won't hurt a thing besides your wallet.

If you have a partially clogged injector, it can cause a missfire. That's the next thing I would check/change.

July 19th, 2011, 10:10 PM	#1
02edge Enthusiast 2000 m112'd 3.8 Join Date: Oct 2010 Location: east hampton ny Posts: 637 iTrader: 0 reviews	how to fix my misfire when my car idles you can hear it miss every once in a while Ive replaced plugs wires coil fuel filter tps iac and a bunch of other things what could be the cause

July 19th, 2011, 10:49 PM	#10
mustangmike! I Post Entirely Way Too Much 2004,1994,1967 14.37 @ 96 Join Date: Aug 2008 Location: Texas Posts: 6,018 iTrader: 1 reviews	im betting copper, run 87 cause thats what your computer wants, lucky you haven't fucked your engine like that ... Next id start looking for leaks if the gas doesn't solve it __________________ 227whp N/A V6 Now w/ 8th Mile 8s ! How To Jmod Your Late Model 4R70W

July 19th, 2011, 11:31 PM	#12
RedDevilGT SG 2005 Mustang GT 2001 Mustang V6 Join Date: Dec 2007 Location: Phoenix, AZ Posts: 4,139 iTrader: 0 reviews	When was the last time you cleaned your MAF? Have you done a compression check? __________________ 01' V6: SCT tuned, Dual Flowmasters & H-pipe, 8000k 35w HID's, Steeda Short Shifter, BBK CAI, Eibach pro-kit, 3.73's and t-lok. 05' GT: SCT tuned, C&L Racer, FRPP cams, Pypes Pype Bomb's, Shorty Antenna, Painted Mirror covers, Decklid Panel

July 19th, 2011, 11:44 PM	#13
Everett Hardcore Enthusiast 2000 gt Join Date: Oct 2010 Location: Saskatoon Posts: 1,053 Blog Entries: 1 iTrader: 2 reviews	Vacuum leak will cause a misfire. And premium won't cause a misfire. Keep using shell gas cause it's a top tier fuel. And premium is more resistant to detonation and preignition. There is no harm using it other than making you lighter in the wallet __________________ Black and White Crew Crew Member # 3 centerforce dual friction,.100 shot freeflow exhaust,70mm accufab tb,professional products plenum, tri ax,3.90s amazing how fast you can go when the road never curves .....lighting up the Canadian prairie

July 20th, 2011, 06:46 AM	#15
03SonicBoom Moderator 2003 Grand Cherokee Join Date: Jul 2008 Location: Indiana Posts: 6,625 iTrader: 0 reviews	I can't believe people are suggesting you change gas octane to get rid of a missfire BEFORE they suggest you change injectors. You can run premium on a stock tune and it won't hurt a thing besides your wallet. If you have a partially clogged injector, it can cause a missfire. That's the next thing I would check/change. __________________

July 19th, 2011, 10:14 PM	#3
02edge Enthusiast 2000 m112'd 3.8 Join Date: Oct 2010 Location: east hampton ny Posts: 637 iTrader: 0 reviews	yeah but its always done it and I usually go to hess or shell and always keep it full of premium

July 19th, 2011, 10:21 PM	#5
02edge Enthusiast 2000 m112'd 3.8 Join Date: Oct 2010 Location: east hampton ny Posts: 637 iTrader: 0 reviews	nope im waiting on my tuner to come in the mail still

July 19th, 2011, 10:38 PM	#8
02edge Enthusiast 2000 m112'd 3.8 Join Date: Oct 2010 Location: east hampton ny Posts: 637 iTrader: 0 reviews	autolite

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