As per title really, when sitting at a junction or in traffic the revs take ages to drop back down to idle. Idle is not always the same speed, ie normal (800ish) I've checked the throttle cable etc and it returns to its usual position. Could this be MAF related? Any help appreciated.

 

I thought somebody might know. Unusual for this bbs!

 

Hello m8

I own a 93 WRX and my car idles at 900 rpm, sometimes dropping for a short while to 800 rpm.

When i pull up to traffic lights, sometimes my revs are at 1200 ish for 30 seconds or so and then slow down to 900 rpm, I think this is quite normal personally.

if it is a lot longer than 30 seconds there may be a problem, maybe need to clean idle valve.. if these cars have one, all other Fuel injecter cars have had one... taken out, cleaned and car is idling perfect again.

hope this helps

Some Guru may wish to help out too for you :O)

Cheers
Rob

 

Cheers Trebor. I have had a look at the IACV and all seems well. The car sits at about 1600-1800 rpm and then slowly drops.

 

Hello Mark

how long does it take to for the revs to drop down?

 

This was happening to my 93wrx for about 3 weeks. On saturday the MAF sensor failed in. After limping home the car is now sitting in my garage. Now waiting for xtreme scoobies to come back with a price. Should be around £190 + vat
DEKA

 

It takes about 10-15 seconds. It has never done this before. I've just been out this morning and it seems to be intermittent now.