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        General >> Problems >> Possible MAF problem (solved!)
        
(Message started by: Kjetil S on Nov 16^th, 2007, 7:43pm)

Title: Possible MAF problem (solved!)
Post by Kjetil S on Nov 16^th, 2007, 7:43pm

Hello,

Today I noticed that the car (2.0 16v manual) wouldn't go below 2500-3500rpm no matter if it was idling or cruising. I checked the throttle body and it sits at idle position touching the stop screw, neither the throttle wire or the cruise control wire have any tension in them.

I tried disconnecting the MAF and immediately the idle dropped to 500-900rpm, however it hunts somewhat. When I reconnect the MAF, it shoots up to 2500-3000rpm again.
I haven't tried cleaning the MAF (yet), that would be a job for tomorrow, but am I right in thinking that the problem is either a dirty or borked MAF?

The car is driveable with the MAF disconnected, but is prone to stalling when I hold the clutch.

Title: Re: Possible MAF problem
Post by Dave on Nov 16^th, 2007, 7:49pm

That an odd one. Have you had a look at the idle control valve?

Is your fuel tank nearly empty? That can cause a high idle, shouldn't be that high though of course!

Title: Re: Possible MAF problem
Post by Kjetil S on Nov 16^th, 2007, 7:56pm

I did try disconnecting the IACV, and that did absolutely nothing. Fuel tank is about half full

Title: Re: Possible MAF problem (solved)
Post by Kjetil S on Nov 17^th, 2007, 2:46pm

Problem solved!

I tried cleaning the MAF (emptied half a can of brake cleaning into it) without any effect at all. I then tried giving the IACV the same treatment and giving it a couple of drops of oil on the shaft afterwards. Now it sits perfectly at 800rpm and purrs like a kitten.

One question though: should the IACV close completely when disconnected? Mine stops at approx. 1mm from full close. I can push it closed but when released, it opens slightly.

Title: Re: Possible MAF problem (solved)
Post by Tompion on Nov 17^th, 2007, 11:14pm

on 11/17/07 at 14:46:56, Kjetil S wrote:

Problem solved!
One question though: should the IACV close completely when disconnected? Mine stops at approx. 1mm from full close. I can push it closed but when released, it opens slightly.

Don't know if it's supposed to be like that, but mine is the same (I'd guess at more than 1mm, but not looked recently).

Title: Re: Possible MAF problem (solved)
Post by jonnycab on Nov 18^th, 2007, 12:59am

on 11/17/07 at 23:14:20, Tompion wrote:

Don't know if it's supposed to be like that, but mine is the same (I'd guess at more than 1mm, but not looked recently).

Mine is the same as well & I have a slightly missing idle in neutral, but put it in D or R & the idle is fine :-/

Title: Re: Possible MAF problem (solved!)
Post by Kjetil S on Nov 18^th, 2007, 1:19pm

Thanks. Is it possible to open the IACV and tighten the spring?