At least I hope thats the right term for my issue....

After going for a drive and putting her in park the RPM starts dancing, kind of like its giving itsself little blips of gas, RPM dances anywhere between 600 (normal idle) and 1300.

Also sometimes happens when you start her up first thing in the morning.

If I floor it real quick and then let off the gas the rpms usually settle back down to 600 and it stays there.

IAC?

Just replaced the damn thing last year...hopefully not.

 

I would be more inclined to think TPS. Got a volt meter? Test it, and see what it does.

 

I do. How exactly do you test it? and what voltages am I looking for?

 

Need an analog meter... digital doesn't react fast enough.... You wanna look at what output voltage is, (middle wire, I think....) should be less than 1 at idle, greater than 3.5 at WOT. (don't need the engine running, just need the ignition on.) Voltage should rise smoothly. If it bounces around, at all.... replace the sensor.

 

TPS. just replace it. about $40-50 at any parts store.

it will likely test out ok, showing variable voltage from idle to WOT.
then still surge at idle....

 

Any suggestions on a decent/good brand?

BWD, Delphi, etc...?

 

My money is on the TPS....I agree just replace it. I went with BWD and took care of the problem, but that was before i read posts from others more knowledgeable than me recommend sensors from the dealer.

 

look for longest warranty. preferable lifetime.
otherwise, it doesn't matter.

 

TPS is probably overdue for replacement, Ill just get a new one and report back with the results!

Thank you guys.

 

You guys nailed it right on the head! Picked up a new BWD TPS with a 1 yr warranty for $50, slapped 'er on and no more surge!

Cheers mates, much appreciated!