misfire in cylinder 1... Desperate
Thread Starter
Staging Lane
Joined: Apr 2008
Posts: 91
Likes: 0
From: New Jersey
misfire in cylinder 1... Desperate Heres the deal about a month ago i got a tune and a week after the tune i
got an occasional slight miss from cylinder 1 thought nothing of it really. But
then about a week ago that miss turned into a big deal giving me a flashing
ses light on the way home. so i turned it off and checked the code it didnt
tell me anything out of the ordinary besides fuel level sensor circuit. so i am
gonna hafta assume that they turned of the cylinder misfire codes. After i
checked and saw nothing that could help figure out the problem i started it
up and it was fine like there never was a problem. that continued for about a
week The problem being that at idle or part throttle it would miss in cylinder 1
but not at full throttle and only after running for a minute or so and if i turn
it off and then on again fine for a minute until something happens that
causes the miss. i checked the plug and wires there appeared to be arching
cause the plug had burn marks on it as did the wire so i replaced them and
later on the coil just trying to fix the problem. so i dont think its a spark issue
maybe leaking injector but i have no clue why it would only do it after
running for a bit. It doesnt do it every day either just when it feels like it i
drove 156 miles and no problem but then on my way to and from work it
crapped out so i dont think theres any reason for when it does it. If there is
anyone that can help i would appreciate it immensely. and sorry for the long
post
got an occasional slight miss from cylinder 1 thought nothing of it really. But
then about a week ago that miss turned into a big deal giving me a flashing
ses light on the way home. so i turned it off and checked the code it didnt
tell me anything out of the ordinary besides fuel level sensor circuit. so i am
gonna hafta assume that they turned of the cylinder misfire codes. After i
checked and saw nothing that could help figure out the problem i started it
up and it was fine like there never was a problem. that continued for about a
week The problem being that at idle or part throttle it would miss in cylinder 1
but not at full throttle and only after running for a minute or so and if i turn
it off and then on again fine for a minute until something happens that
causes the miss. i checked the plug and wires there appeared to be arching
cause the plug had burn marks on it as did the wire so i replaced them and
later on the coil just trying to fix the problem. so i dont think its a spark issue
maybe leaking injector but i have no clue why it would only do it after
running for a bit. It doesnt do it every day either just when it feels like it i
drove 156 miles and no problem but then on my way to and from work it
crapped out so i dont think theres any reason for when it does it. If there is
anyone that can help i would appreciate it immensely. and sorry for the long
post
yeah i kinda got consused too. i thought he said replaced the plug and wire
EDIT: No you're right he did replace the coil
EDIT: No you're right he did replace the coil
On The Tree
Joined: Jan 2009
Posts: 121
Likes: 0
From: Jonesboro, AR
There are several reasons why you can have a misfire and low RPMs/idle. I use to have a 95 v6 slowstang and it was misfiring on cylinder 2. We checked every possible factor. It would only miss on idle. Truth is, the easiest way to find out is to take your head off. Mine ended up being a leaky head gasket. So I replaced the gasket and it ran fine. When you have higher rpms, your heads are firing more frequently, more pressure, no leaking problems. Another thing I read it could be would be a slightly bent rod. Turn the crank enough to get the piston to the top. if it doesn't reach all the way to the top, it's a bent rod causing it to misfire. In that case, you're boned. If all else, you could need an intake gasket or a manifold gasket.
Trending Topics
Launching!
Joined: Dec 2008
Posts: 206
Likes: 0
From: Hammond,La
ive asked thunder racing about this same problem shane told me of all his ls1 experience he has only had 1 coil pack go bad and if you have changed your plugs and wires and it still does it its most likly a bent push rod. the trays they are in are plastic and according to thunder racing wear out easily most likely a cheap fix just a bitch getting the head off due to a plastic tray on a high performance motor
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Teching In
Joined: Jan 2009
Posts: 13
Likes: 0
From: mobile al
If u can get it to miss at idle check intake runner gskt with wd40. if idle goes up it's leaking. also depending on mileage. a valve seat may be damaged. or a burnt valve from too short injector on time in the affected cyl. u can also check injector spray pattern to see if pentel is damaged or just clogged.
Thread Starter
Staging Lane
Joined: Apr 2008
Posts: 91
Likes: 0
From: New Jersey
the scanner shows misfires in cylinder 1 when ur looking at real time data but like i said i dont know why a bent pushrod or anything mechanical for that matter because like i said it isnt an every day thing it was fine today
