Formula_Power

iTrader: (18)

I just got done with my ls1 heads cam swap and i looked at my misfires and i am showing a miss on every cylinder but not a dea mis just hear and there...i have hypertech tune on my car right now but nothing yet for the heads and cam...the cam is a 230/236 571lift cam...could i just need a tune or is it more serious??

everything looks good...all wires on and spark plugs tight

thanks
Dustin

Zymosis

iTrader: (7)

As long as you have checked the obvious, a random misfire code can happen with a cam. I would dump the hypertech tune and get a real dyno tune.

tkz28

try setting the hypertech back to stock because all those things do is cause trouble

Formula_Power

iTrader: (18)

i set it back to stock tunning and still have a miss on all cylinders

just1news6

i say tune asap could be a timing issue

shouldaboughttheZ

iTrader: (8)

get a tune

Black FormulaLs1

iTrader: (10)

DEF GET A TUNE.. Carolina Auto Masters is where i am going when mine is put back together

Formula_Power

iTrader: (18)

has anyone else had a problem with bad missing after a head and cam install??

I am also not able to rev it up past about 4300 rpms....even at full throttle...it's like it's just not getting all the air and fuel it needs...anyone ever seen this be4??

waterbug1999

iTrader: (3)

By miss you mean like backfire?

I had one side of my coil pack wire harness switched 180 degres out of sink.

Formula_Power

iTrader: (18)

no i have not had a backfiring problem...but the engine missing badly...the whole motor will shake....i guess there is a chance i could have mine on backwards as well i will have to double check that

thanks
Dustin

waterbug1999

iTrader: (3)

Well, if its not backfiring then I dont think thats your problem. Mine was backfiring bad so I turned it off and then thought.. hhmmm, wonder if the harness is backwards. And sure enough it was and it purred like a cammed beast!

So your saying you get "missfire" on all 8 cylinders?

I know on my 04 Z71 I had a bad O2 sensor on one side wich caused the motor/truck to sputter and shake. Technically, it was sensing lean so it would throw alot of gas in that side of the motor. Had it scanned it said "misfire".. Just a thought.

1sick'98WS6

iTrader: (19)

I have the same problem, my guess is the comp r lifters though..... too long of pushrods. i dont know what my problem is

Formula_Power

iTrader: (18)

yes i am saying that there is a mis on all 8 cylinders....no real dead spot just a random miss ....also the car won;t rev past about 4500 rpms

waterbug1999

iTrader: (3)

Well, I wouldnt keep trying to push it either. But, I am stumped.

oange ss

iTrader: (50)

you need to get the misfire tables tuned..even just a big cam swap with throw a misfire code

Formula_Power

iTrader: (18)

Yea I am starting to think it's got to be the tune because i have double checked almost everything and found nothing...i just didn;t think it would run so aweful without a tune....i was faster when i was stock

thanks
Dustin