Ok guys here it is i have an 88 TurboII with exactly 2800 miles on a new streetported engine it just doesnt want to idle when i bought the car which was like 4 days ago it was idling somewhat decent just when you turned the AC on the car would some times shutoff from downshifting now the car cant even stay on without the AC on i found a huge vacuum leak and fixed it now the car idle for a little while about 30 secs and just then starts having problems idling any ideas?
TwEaK

 

Sounds like somebody had the idle set for the vac leak. Turn the BAC up some. Or to be proper you should really go through the whole idle setup routine.

 

i dont have a BAC valve it was removed along with emmisions. Anything else you can think of?
TwEaK

 

Well taking off the BAC valve is why your car will stall when turning on the AC. The BAC controls the idle for options like the AC when its turned on. That part your just going to have to deal with.

As for the idle issue, read the fuel and emissions area of the FSM, there is a nice little tuneup guide for adjusting the tps and idle mixture etc.

Is there any surging? you probably can't tell with it just idleing, especially at low RPM's, but if you hold the throttle at like 3000 rpm steady, if it goes up and down that means that your tps is probably bad, as in it has dead spots. This has a alot to do with 'rough' idleing.
Another thing to, is the o2 sensor. If its completley gone, your gonna run rich, too rich, causing a rough idle. Clean the plugs while your at it too.

thats about all I can say.

 

ok sounds great i got it to idle today but yea real rough idle is there any way to put my BAC valve back on but still have emmisions off?? Also after getting the car to idle and driving it in first gear if you floor it the motor completely bogs out and dies and ideas on that need info asap or will just get out of the rotary scence completely getting real tired of working on these cars =/ try to help me out guys.
THANKS
TwEaK

 

Check and adjust the TPS. Also check for vac leaks if you havent already.

 

i personally think the TPS is bad but not shure and vac leaks ive been checking for a while but havent found any yet any idea on the bogging out when floored?
TwEaK

 

bump any help please
TwEaK

 

if it bogs that sounds like you have the tb mod witch some people say that the tb mod makes your car bog when you mash the accelerator. Also if you think your tps is bad why don't you just put a multimeter on it and check to make sure it is set at 1volt and when you press the accelerater it makes a good sweep without going crazy on the multimeter. Also if it goes above I believe 5volts its a bad tps as well. You do all this at the ecu, wayne has been answering this question for a long time, if you do some searches he can explain it better

 

yea me and wayne are chatting now back and forth threw pm's i know i have no TB mods so any other ideas?
TwEaK