my first big problem

[nasty_4g63]

So i was driving my car home from work today and when i got off the highway my idle just started to act up it shot straight up to 4k so I shut the car off waited a few mins and turned it back on it would barely idle it would just miss fire and run like crap. When driving it isn't that bad other then when I push in the clutch to shift the rpms jump up like crazy. It is also running very rich. I feel like it is my iac but would that cause he weird miss fire at low rpms or even a vacuum leak.

 

[gufi]

Iac or possible Fiav... or even sticking open throttle plate?

 

[pauleyman]

If it runs differently and not just a change in RPM then it shouldn't be ISC or FIAV. Those both use metered air. This sounds more like a leak somewhere.

 

[nasty_4g63]

pauley is there any way to test for leaks?

 

[pauleyman]

Boost leak test. Look at vfaq.com for how to.

 

[nasty_4g63]

Ok sounds good thanks for all of the help man.

 

[Gst to the max]

my gst used to do this and it still kinda does on first morning start up. take out the idle air control sensor and clean it with break parts cleaner and put it back in do the same to the tps i cured a lot of my problems and i got better throttle response.

 

[Spoolin4Ever]

inspect ecu

 

[nasty_4g63]

I found the problem it was my intake manifold. The gasket was blown out of the part on the near the coil.

 

[pauleyman]

sounds more like a leak somewhere

Yup. Been there done that.