fast idle on '96 sport 4.0 w/manual trans

[scottmotocross]

please delete

Hi,

I'm having a problem with a fast idle condition (1,500-2,500) when shifting. I have a new IAC valve and the linkage is not sticking. It idles normal (when warm) if I unhook the IAC valve wires. Is there a manual trans specific IAC valve?

Thanks for looking,
SMC

 

[410Fortune]

Do you have a check engine light?

 

[scottmotocross]

Do you have a check engine light?

Not any more, I removed it years ago.

 

[410Fortune]

Why? A stored DTC right now might tell you exactly whats wrong.
I would try pulling the codes.

 

[scottmotocross]

I have a programmer/reader but all it says is an oxygen sensor code. Maybe a bad throttle position sensor?

 

[410Fortune]

Maybe an 02 sensor? Dont ignore OBD-II codes.

all these sensors can be tested instead of throwing $$$ at it.

 

[scottmotocross]

I was getting a slow response code for the 02 sensors so I changed them. It didn't help much. I unplugged the TPS and didn't notice any difference in idle, should I have?
If I drive it until it gets warm them shut it off and start it back up the problem stops until it gets cold again.

 

[scottmotocross]

Anyone?