Idle?

[CharlieRHFD]

The 96 GST im looking at idles rather low i think, like 700 rpms maybe, and wen i give it a little gas, its fine but then it falls way down and almost stalls out, then after a few seconds it comes back to idle at like 700 again. why is this?

also, how much do yall think a new hatch (trunk) would be?

thanks

 

[jaredgsx]

could be an o2 sensor, possibly throttle positioning sensor

 

[1993TalonTsiAWD]

Does it have a aftermarket boost/vac gage? If so report back with whats it's reading at idle.

Derek

 

[CharlieRHFD]

no aftermarket parts, all stock.
i have not idea what it could be.....?

 

[iiiwildfireiii]

I have the same problem 'sometimes'. The problem is intermitten. My SAFC reads idle at 750 RPM in park and 690-720 in drive. I'm using a 1g BOV on the stock UIP. Its readings are 17 in/mg (drive) and 20 in (park). Whats yours?

 

[gamingguru]

ISC?

Back when I had a MAF sensor in my car and I forgot to plug it back in it would act kind of like that. Just something to double check.

 

[CharlieRHFD]

so then what is it again?

 

[gamingguru]

Um, what's what?

 

[CharlieRHFD]

so, again, why is the idle doing this (opinions) and what do I need to do to fix it?

 

[CharlieRHFD]

so, again, why is the idle doing this (opinions) and what do I need to do to fix it?

 

[kottyking]

Try adjuststing your idle screw. This is the screw located on your throttle body. This controls the idle. Every so often, it may need to be adjusted. If its idling at 700, Thats barely idling and you arnt building very good oil pressure. So it will drop especially when your using power like blasting the ac or braking. This causes the idle to drop more and possibly stall the car. The perfect idle is 750, but i like mine a little higher like around 850.

 

[kottyking]

ISC?

Back when I had a MAF sensor in my car and I forgot to plug it back in it would act kind of like that. Just something to double check.

ISC is idle speed control. I had to replace this when i had an idle "surge". Thats when the rpms would bounce around from 800-1500.

 

[CharlieRHFD]

but the idle doesnt bounce around, its just when i give it gas, it goes up in rpms (to where i gas it) then when it falls back to idle, it falls all the way down to like 200 rmp and just about dies for a second or 2 before it goes back to normal idle

 

[Fayt]

Make sure the BOV is still recirculated back into the intake line. Stock, our vehicles need that, or they can/will stall out quite easily. It should just be a black S-like tube from the BOV to the intake line.

If that isn't there, the car can die randomly and after revs it can/will 'die' or stall out.

 

[CharlieRHFD]

im pretty sure that the bov is recirculated. my automotive teacher (real smart dude) said that it may be caused by a multitude, one being a bad cat (the whole exhaust on this car was infested by mice/rats and then cleaned out. the OUTSIDE of the cat is in rough condition, i dont know about the inners) because the exhaust cant escape and gets built up in the exhaust. anybody know anything about this or have any other opinions? thanks

 

[CharlieRHFD]

i want to go check out the car this weekend. should there be anyting i can check or do to diagnos a problem? helpp is greatly appreciated.
thanks

 

[CharlieRHFD]

i want to go see this car tomorrow, what can you guys tell me? please, desperate

 

[LASER4G63T]

try making sure the plug on top of the idle adjuster is tight. i had the same problem, and that plug was leaking vacuum which at idle is very noticable.