new TB/Plenum question?

[DUKE]

I installed a new Accufab TB and plenum. The idle starts to climb to around 3k and I took off the IAC connection while I was under the hood and the idle came back down to around 700 and stayed there. Does this mean I have a bad IAC valve and need to get a new one? Also, if my idle is back to wher it was befoer the install of the new parts, do I still need to check the volts of the TPS with a volt meter?

Thank you for any help-

 

[lightblade]

i have the the accufab 75mm tb nad plenum too, if your car idels with the iac off and mess up plugged in then it needs replaced, but furst u could try and clean it with some carb cleaner first if it still wont idle then it needs rplaced, dont mess with the tps

 

[JimC]

Not necessarily a bad iac but the voltage may need to be set. I would start there first.

 

[twogts4us]

Not necessarily a bad iac but the voltage may need to be set. I would start there first.

Voltage? You must be talking about the TPS.
I had no issue with this mod...no messing around with a voltmeter on the TPS. Heck, even Accufab said you can just manually adjust, if necessary - they said that's what they actually do themselves.
But, Duke, this sounds like a bad IAC.
Did you reset the computer when you swapped the plenum and TB out?

 

[DUKE]

Thanks for the replies. Yes, I had the battery disconnected for about an hour. I hookde my volt meter to the TPS and even removed the two bolts holding it down and I couldn't get a higher reading on volts than a 0.02??
I think I could have a bad TPS and needs replaced?

 

[StangLou]

Its more than likely NOT your TPS. You normally wont notice anything at idle with a bad tps. You will however notice that the throttle responce going out with a bad tps. You may floor the car and it will just sit there, and stuff like that. A bad idle is usually a sign of a bad iac.
After many people did this swap they all seemed to have a "sticking" idle. I did as well. After the install, I started the car up and it fired up fine, then when the revs started to come down it stuck at 1200-1300rpms for about 4-5 seconds then would drop back down to normal. This is apparently normal with this mod. It will wear off after a week or so of driving.

 

[twogts4us]

Yep, as Lou experienced, mine noticably calmed down 5 days after the install...behaves like stock now.