nasty00vert

I just put a set of lifters in a 2002 trans am that has patrior performace stage II heads comp cam 230/232 .591/594 lift 114 lsa custom tuning by futral motorsports and a ported throttle body.. the car ran fine other than the lifter tap when it came in but now every time you start the car it jumps to the rev limiter and hangs there i check for vacuum leaks none were found and everything is pluged back up the way it was.... throttle bracket is level with the top of the intake and cable is snapped in all the way the onlything different on the car is when i did the swap i put a perfeshinal products 85mm polished intake manifold on it for it but there are no leaks what so every some one told me it could be the tune because i pulled the negative cable but even without the car tuned it shouldn't idle near that really dont know where to look any ideas? thanks..

nasty00vert

also the idle never goes down i really dont feel as a tune could make the car act this way

nasty00vert

has anyone had this problem?

nasty00vert

bump.

jermzz

iTrader: (18)

too many possibilities.

Try an idle relearn.

Try a TPS relearn

Try cleaning it IAT

have you drilled the throttle body?

Could also be tune related. Mail order tune, or dyno tune?

I could go on.......

nasty00vert

yes the throttle body has been drilled how do you do the relearns? ill try cleaning the IAT i believe it was dyno tuned

jermzz

iTrader: (18)

did it start doing this completely randomly?

To do an idle relearn simply disconnect the battery for a few minutes.

Resetting the TPS:
Key off.
Unplug TPS.
Turn key on for 5 seconds.
Key off.
Plug in TPS.
Turn key on. Closed throttle should be 0%.

A good tuner will really never drill a throttle body, the hole could just be too big. In this case you will need a tune. Try the above first.

afastm6

iTrader: (1)

Look at your throttle cable make shure its not pullin open the butterfly if it is and I b willing to bet it is theres a place on the cable to release some slack

00'WS6Rocket

iTrader: (3)

Take your foot off the gas

nasty00vert

alright problem solved it was the bolts under the intake manifold for the knock sensor plate.... the heads of the bolts were to big and even though i thought it was not causing a vaccum leak it was... after the first start up had to fight to get the car to idle because of the lack of tune after getting it to idle it idled at about 950 for a while and but now it jumpped to 2k and hangs there when i let out of the clutch it comes down if its in gear but it pulls as if im giving it gas... and ideas?

nasty00vert

Thanks for everyone trying to be helpful this wouldnt be anonther vacuum leak would it? i mean the car did fine untill i shut it off and turned it back on the way it pulls when its in gear makes me feel like the tps is out of wack

95ONE

iTrader: (1)

I'm fairly new.. So excuse me for the obvious. Is this DBW or DBC? IF cable DOUBLE check what afastm6 is saying. make sure the throttle is not getting stuck open. Hopefully you've check this. But obvious stuff first.

jermzz

iTrader: (18)

try the TPS relearn. might have been compensating for your extra air.

afastm6

iTrader: (1)

I had the same issue when I started mine after changin lifters and cam it was the throttle cable im still not shure how it got out of wack but it took me a few to figure it out lol if the car ran good before its prob something simple even the best builders might overlook just my .02 but hope u figure it out

nasty00vert

problem solved intake manifold bolts walked out so how or maybe i forgot to tighten some all the way ha now that i have the idle down the car trys to hang when you let off the gas it will jump to lets day 3k when reved and just hang there.... tried tps relearn and fooled with the throttle cable

crainholio

iTrader: (2)

And with that, another case of "I screwed up something on my car pleeeeez teh halp!!!1!!1" comes to a close.