sohc19974.6l86

it runs good but coming to a stop the car stays at 2k and backfires( pops) untill you completly stop and about 6 seconds later it will come down. anyone know what or why its doin this?

z28rob18

iTrader: (7)

do you have a new TB wen i put my new TB on it would hang up as high as 4k u try sprayin it with some lube?

sohc19974.6l86

i just had it off today and cleaned it real good, i dont think theres any problems with it.

myltwon

iTrader: (1)

you just install the cam?

sohc19974.6l86

no, the car has a pcm4less tune...i just bought the car, just trying to go thought it and figure it out. there are no vac or gasket leaks that i know i checked the best i could its got all new sensors plugs and wires coil-icm. i cant figure out what would cause it to hang up....

myltwon

iTrader: (1)

vacuum leak or cam installed wrong imo

sohc19974.6l86

is there any way i can find a diagram for 96 lt1 vac routing?

sohc19974.6l86

or tips on trying to find a leak?

myltwon

iTrader: (1)

vacuum gauge and a can of carb cleaner go a long way

shbox.com should have something in that regard

also how is the valve lash?

myltwon

iTrader: (1)

well nevermind didn't see the part about the car running good everywhere else, rule out cam timing and valve lash

possibly stuck TB blades or IAC valve

sohc19974.6l86

baldes are good and brand new iac.. oh and the car i very hard to start after hot and cool down...

ss.slp.ls1

iTrader: (36)

^^^I'd start there...since you said the IAC is brand new.

myltwon

iTrader: (1)

also forgot to mention the fan shroud has a vacuum diagram

sohc19974.6l86

could i tak it to a shop to get tuned or can they not do nething if its no rite?

ss.slp.ls1

iTrader: (36)

Has it always had this problem or did it just occur lately. If it's the latter, tuning it won't address the actual problem.

myltwon

iTrader: (1)

sounds like he bought it that way

maybe throttle cable is binding