I have been studdering..(Update 3/14)

TheNatster513 · Jan 16, 2011

This summer I put the gt40 package on my car with a light cam (if you need specs I can get them). But it studders.. A lot. The weird part is the stuttering can be worse, not there, or lightly. Anyone have any suggestions? It's getting really annoying. It can go away when I romp it, but it Boggs down for a bit then just unleashes like some one flipped a switch? And other times it will do nothing? It does better on premium.

Win · Jan 16, 2011

Re: I have been stuttering..

What is your timing set at? Have you checked your dist for water condensation? or a coolant leak around your thermo housing?

duh09 · Jan 16, 2011

Re: I have been stuttering..

Check your timing would be my first suggestion.

CC'S95GT · Jan 16, 2011

Re: I have been stuttering..

check that your coil isn't breaking down

TheNatster513 · Jan 16, 2011

Re: I have been stuttering..

Win said:
What is your timing set at? Have you checked your dist for water condensation? or a coolant leak around your thermo housing?

it should be at stock timing. I'll ask the mechanic sometime. Where would I check dist for cond? No leak around thermo.

CC'S95GT said:
check that your coil isn't breaking down

what do you mean coil?

CC'S95GT · Jan 16, 2011

Re: I have been studdering..

Ignition coil.
When a coil gets old the insulation around the windings used to increase the voltage starts to break down causing internal shorting. which gives you a missfire or no fire at all.

TheNatster513 · Jan 18, 2011

Re: I have been studdering..

CC'S95GT said:
Ignition coil.
When a coil gets old the insulation around the windings used to increase the voltage starts to break down causing internal shorting. which gives you a missfire or no fire at all.

how do I check this?

CC'S95GT · Jan 18, 2011

Re: I have been studdering..

Your haynes manual can tell you how to do it.
You can get a new one for less than $40

TheNatster513 · Feb 4, 2011

Re: I have been studdering..(Update 1/4)

Update: I have not tried the coil. But I have a new development. I started my car this morning and let it warm up for a few min. I left the heat off to see what would happen. I started to drive the car and it drove perfect. So about half where to where I was headed I thought I would see what happens if I cut the heat back on. Studdering is back. What would cause this?

phantom09086 · Feb 4, 2011

Re: I have been studdering..(Update 1/4)

idle air control (IAC) it controls you Idle or RPMs when there is a load on the engine.

TheNatster513 · Feb 4, 2011

Re: I have been studdering..(Update 1/4)

What do I do with it?

phantom09086 · Feb 4, 2011

Re: I have been studdering..(Update 1/4)

Take it off and spray carb cleaner in it to get all the carbon build up out. It works sometimes, But most of the time you have to buy a new one. Rockauto.com sells them for a good price.

CC'S95GT · Feb 4, 2011

Re: I have been studdering..(Update 1/4)

Ck your grounds in the engine compt.

TheNatster513 · Feb 4, 2011

Re: I have been studdering..(Update 1/4)

Where is it?

phantom09086 · Feb 4, 2011

Re: I have been studdering..(Update 1/4)

The IAC is on the TB next to the TPS

Win · Feb 4, 2011

Re: I have been studdering..(Update 1/4)

Is it only the heater or was it the whole fan and AC system?

TheNatster513 · Feb 4, 2011

Re: I have been studdering..(Update 1/4)

Idk win. Its like 40 here and I clicked on the heat and it started stuttering bad. I did feel it very lightly before I clicked on though.