If you have an AutoZone near you, have them scan the computer for codes. They do it for free. I'm not sure if anyone else does that, but I would check around. Get the code, and come back to us. We can help from there.

 

you can make it loud flowmasters deffinatly takes the crown for loudest.....imho ....loudest hard poo...i much perfer magnaflows sounds not a loud but richer sound (i can feel myself making enemys) anyway....as far as building speed... there is several nice stickeys for upgrading the 3.8 buuuut

ill start you off...

*bolt ons

-cold air intake

-cat back

-headers

-highflow cat
-LS1 driveshaft

*internals

-cam

-rollers

-lifters

-pushrods

*drive train

-positraction or LSD

-rear gearing

*power adders

-this includes Super chargers and turbos but i would suggest nitrous

 

you were right, it was the IAC. i have replaced it and am back on track. thank you

 

0_0 thats a good list thank you very much. i have the LSD on their already.

 

if u say ur not short on the cash,, y dont u do an engine swap.. u well def have something diff and clean.. unless your goal is just to mod a v6