weird idle? confuse.

[chavez408]

My car has been acting weird lately My iddle is going nuts! It will start from 1200 rpm than it will drop to 1k than go up again and down.. and it does this weird noise, kind of if its dying? what do you guys think it is? Is the timming all ^uck up? Should i mess with the BISS?
suggestions please

 

[eboy0]

My car has been acting weird lately My iddle is going nuts! It will start from 1200 rpm than it will drop to 1k than go up again and down.. and it does this weird noise, kind of if its dying? what do you guys think it is? Is the timming all ^uck up? Should i mess with the BISS?
suggestions please

Have you done a boost leak test lately?
Shouldn't have to mess with the BISS screw if it started to happen all of a sudden.
Also, your ISC motor may be going, if you have a voltmeter handy, test it via this page.
http://www.geocities.com/motorcity/downs/7678/dsmtests.html

 

[Eastwood95]

a bad idle out of nowhere could definately be a boost leak. Check all of your couplings for cracks or leaks. Is your car running rich? Any black soot in the muffler or shooting out of it?

 

[chavez408]

Boost leak eh? I do feel the lack of power during WOT now and than. No sir, no shooting out my pipe.

 

[chavez408]

checking for boost leaks, from where should i start from and finish? THis is my first turbo car.

 

[95blackGsTurbo]

http://www.vfaq.com/mods/ICtester.html

 

[Eastwood95]

after reading that, do you understand the process?

 

[chavez408]

Uhm, So I remove the intake pipe from my TC outlet and attach the leak tester and pump it up with a bike pump and listen for leaks, in short words.
IF leaks appear (Ther will be ) Replace it.

 

[doggo]

My car has been acting weird lately My iddle is going nuts! It will start from 1200 rpm than it will drop to 1k than go up again and down.. and it does this weird noise, kind of if its dying? what do you guys think it is? Is the timming all ^uck up? Should i mess with the BISS?
suggestions please

Boost leak's a possibility, but sounds more like a bad ISC to me. Check it. It's easier than doing boost leak testing.

 

[chavez408]

Yes sir, Sometimes my POS tends to want to die aswell, like It iddles very low (500-600) and it tends to die.. I give it some gas for it to raise back to life when this happens.
I also found one of my injectors cable is very damage, its barely holding on by some black tape that the previes owner used. If i touch it or move it around, the car will stall, could this be a problem aswell? Maybe the car is not gettin enough fuel? And too much air. the 50/50 mixture of fuel and air is all mess up..