Rough idle in gear???

fordmfp · 06-12-2012, 03:11 PM

Hi Guys

Ive just got myself an AU2 Fairmont wagon 6cyl. It starts and runs really good and idles around 800-900rpm smoothly but when i put it into gear (reverse or drive) the revs drop to around 400-500rpm and it seems to run rough and sometimes sort of splutters a bit when i accelerate.Once its running it drives beautifully around town and open road. What would be the best things to start checking?

Cheers
Dwayne

AUFanboy · 06-12-2012, 08:34 PM

Try cleaning throttle body and ISC first, easy and free. Then I'd be looking at the intake manifold gasket, it seems to be a common failure. About $15 and a couple hours work with a 10mm ratchet spanner. Normal idle speed is 550 rpm so they are hard to get completely smooth at idle... I've replaced/checked almost everything on mine and can still feel a slight vibration at idle, but it runs fine otherwise.

fordmfp · 07-12-2012, 05:42 AM

Ok thanks for that mate i'll try those and see how they go

Maka · 07-12-2012, 09:26 AM

G'day fordmfp, fuel filter is worth looking at also.

cheers, Maka

fordmfp · 10-12-2012, 04:37 PM

Hey guys quick update i had a look at the intake manifold bolts (DAM THEY ARE TRICKY TO GET TO) and got about half a turn out of each, I didnt think half a turn would make a difference but wow what a difference, It is idleing awesome now!! No shaking at all. I will get a new gasket for it at some stage. Now im going to give the throttle body a clean to see how that goes.

Cheers for the help