high then low idle

[allHYPE]

ok welli recently purchased a 95 gst that has a 99 gsx botton with a 95 when i first got the car it idled a little high around 2000 and now for some reason it idles really low as to the point it lobles like it has high left cams any idea? i did notice that the wires that go to the tps connector are a little tight almost like they don't reach. But as to why it used to be high but is now low has me confused. I just want the damn thing to idle right. Any suggestion are greatly appreciated

 

[miguelmcv]

Do a boost leak.
It might be a crack hose.

 

[allHYPE]

no leaks did a smoke test at work no issues there

 

[1995 gst]

it should idle at 2k on a cold start and down to 700-1300 rpm when warm.

 

[allHYPE]

No it use to sit at 2000 no matter what hot cold anytime now it idles low all the tike no matter what

 

[98yctuner]

have you messed with the biss screw by any chance? hmm are you sure u did the boost leak test correctly? sounds a lot like what happens to my car when it has a leak...

 

[bohemothman]

I have a almost the same issue but figured out it was a vacuum leak, but it may be different. I would try a vacuum leak test.

 

[98yctuner]

yea see, or check and make sure no throttle cables are getting stuck anywhere.

 

[92AWDHX40]

Terry's Talon Troubleshooting Tips #3 - Fast Idle (aka. Idle Surge)

 

[Tiki2777]

I dont know what to tell you, my 6 bolt surges from 1k to 2k until it warms up because it is a 6 bolt (they have some different reasons why), but unless yours is a 6 bolt engine then it could have been a boost leak like someone else commented, and the throttle cable may be too tight like you said.

 

[98yctuner]

I dont know what to tell you, my 6 bolt surges from 1k to 2k until it warms up because it is a 6 bolt (they have some different reasons why), but unless yours is a 6 bolt engine then it could have been a boost leak like someone else commented, and the throttle cable may be too tight like you said.

umm no? i don't think thats right. It shouldn't be surging like that AT ALL. my 6 bolt long block doesn't surge what so ever when i don't have any boost leaks. you might want to do a boost leak test on yours

 

[LOLVTEC]

check your tps, biss screw, or your TB gasket, and test your ics. everything can be found on vfaq.com