Well, I got the low idle problem. Its gotten progressively worse over the last couple of months and yesterday it actually threw a code. P0506 which is the IAC. I cleared the code with the X3, which now I'm thinking I should have left it in there. Anyway, I returned to stock and cleaned the MAF today but still low idle. Through the site, I figured out that the IAC is a part of these throttle bodies so I have a series of questions.

1. Should I clean the TB myself? If so, whoever has already done it please shed some light.

2. Should I let a dealer look at it?
a. If so, I have a S&B CAI do you think they will try to shiat me on it?

b. Should I wait for it to throw the code again before taking it to the dealer?

Oh, and I by no means, want to take it to the dealer! Should have let that be known up front. If I can somehow get to the IAC cleaned without going that route then I'm all for it.

Thanks in advance for any help.

Nat

 

If the IAC is bad...you have to buy a whole new Throttle Body.

what year is your truck?


the older trucks have a different throttle body from the newer trucks...so if you end up with a newer throttle body, you'll have to get your PCM programmed to accept that new style





go ahead and clean the throttle body though. It cannot hurt, and might be a quick easy fix.

 

I've got a 05 SCREW 5.4


I'll give the TB a good cleaning and see how that works. Do you think the dealer will try to stick me since I have a CAI? I just had it in to them last week to get my cam phaser changed out so I can't just throw the stock intake back on an ease on in there. Surely the techs will remember.

 

They might...they could rationalize that you over-oiled your aftermarket filter causing your IAC to stick and coat your TB. Being that the IAC is non-serviceable they could tell you that you need a whole new TB...

 

Yeap, replace your TB

 

Just got back inside from cleaning my TB and that was the issue! It was fouled up pretty good. I'd be hard pressed to say that my K&N filter and the new S&B CAI weren't contributing factors to this build up. If I had to do it all over again, I think I would lean towards a dry filter especially since the IAC is built into these throttle bodies.

Nat

P.S. Wish I would have took a picture... sorry guys.. Hindsight=20/20