99FormulaM6

iTrader: (21)

so i searched, found nothing related. looked in other forums, couldnt pick which one it should go in...so here it is.

only at 4500 and above at WOT, backfire/slight miss(maybe). when it happens i can def feel it through the car. but the car still pulls hard, just loud popping is occuring. im going to try and resest the pcm tomorrow, and check the grounds. any other suggestions?

Swang

iTrader: (3)

my friend with a 95 LT1 is having this prob too, if anyone figures it out, please respond, ASAP

jaberwaki

at first look it sounds like detonation, get a run logged on autotap (or equivilant) and ensure you are not picking up knock. often times a tune that is ok for daily driving can bee too lean at wot, or have too much timing advance...

if you get more details on what your hearing keep us informed

99FormulaM6

iTrader: (21)

but the only thing is that it been fine for months now.

jaberwaki

is there anything you changed recently?

other then that i would start some basic maitnance...
take off your maf, clean it with some isopropenal.
check your plugs and wires.

and logging a run would still be useful in trouble shooting this

99FormulaM6

iTrader: (21)

the only person i know who can log it for me is nick (suprslo), and hes in salisbury...while im in va beach. but i first noticed it when i got it back from the body shop last friday....but then it stopped...nd now its doing it again. and last night, i was seeing when it does it, and its in any gear, above 4500rpms at WOT.

jaberwaki

VABEACH!!!! you kiden me?....

go to
www.easternfbody.com
ask in the lounge, i'm sure someone will log it for ya...

slow96z

iTrader: (12)

In my 96 it was a coil and valve springs

99FormulaM6

iTrader: (21)

ya, im @ efa as well. (red96ta). ill ask in the lounge and see.

DVCrazyCamTAWs6

iTrader: (6)

could be the Opti-Spark, or bent pushrod as for as LT1's Go

psykoTA

iTrader: (4)

Bad gas, water in the tank?

dnkynrbk

iTrader: (34)

Hey my car did that too and got worse every time at high rpms and when it shifted into a gear fast. Only did it when I took the car at high rpms. So took it to a pro auto and said the plugs in the LS1 MOTORS where recalled and that they need to install a hotter plug and re gap to a new gap measurment. He showed me this on the internet that mech. have access to I change mine and it runs like a dream again. let me know hope this helps

jaberwaki

never heard of this, but then i dont know anyone running stock plugs....(be a fool thing to pay that much for plugs...)
ngk tr-55 is the plug you use for n/a
ngk tr-6 for N2O....

i still dont know why anyone would run ANY other plug....

99FormulaM6

iTrader: (21)

im gonna try and reset the computer today, and see if it fixes it. the only thing is that it doesnt do it all the time. but well see. ill see what i come up with.

psykoTA

iTrader: (4)

Ive got stock plugs in my TA with 72K on her. Never had the issue described.