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Discussion Starter · #1 ·
Ok...having a weird idle problem...figured I ask if anyone has come across this before.

Some Back Story:

About a week ago I did a tune up on my lude.

B21a1 250,000

I replaced:

Cap and Rotor
Plugs and Wires
Cleaned My CAI Tubing and Filter
Set My Timing
Oil Change

After I put everything back together, I'm now having an idle problem where the fast idle will adjust to 1500rpm, then it kicks up to 2000RPM, back down to 1500RPM, then back up to 2000RPM.

It will do this continously whether it's cold idle or even hot idle.

I'm thinking it's possibly the IAC Motor might be pooched/plugged, but I'd like some other input.

Oh, I also redid coolant and thermostat today, but this problem has been occuring before that.

Ideas?
 

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are you running a b20a3? those idle speeds are insane.

id check for codes firstly then go from there

also re check everything you did.

its possible for an IAC to do that but check for codes first.
 

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Discussion Starter · #3 ·
playboyesq said:
are you running a b20a3? those idle speeds are insane.

id check for codes firstly then go from there

also re check everything you did.

its possible for an IAC to do that but check for codes first.
Believe me I checked. Everything is back in place, including all vacuum lines. Everything is as it should be.

And Im running the b21.
 

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go check the codes then thats all i can say. if its a sensor out of whack then the ECU should be picking it up

ne how im going to bed. peace
 

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Discussion Starter · #5 ·
playboyesq said:
go check the codes then thats all i can say. if its a sensor out of whack then the ECU should be picking it up

ne how im going to bed. peace
No codes either...
 
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