I hope someone can throw some light on this.
I have a 1996 (N plate) RS2000 with the original 2.0 Zetec engine.

When I first start it in the morning the engine runs really 'lumpy' and the revs seem to 'hunt' between 1000 and 1250 until the engine has been run for a little while. It only ever settles down to just under 1000 rpm once the engine is up to temperature, and the 'lumpiness' is still noticable after that.

Any ideas what could be wrong?

I need to arrange an oil change as I am not sure the correct oil was added at the last oil change (5W 30) and I don't think this is helping either.

Cheers, Roy

 

IDAL CONTROL VALVE ITS NEAR THE THROTTLE BODY x2 8mm bolts hold it on take if off and clean it out with carbe cleaner the re lube with wd-40 also chech for air leaks

 

Cheers, I'll have to give that a try.

 

Susequently found out that the engine in the RS I have is the DOHC 16V I4 engine and not the Zetec as previously thought.

Sorry for the confusing people

 

Have a good look round for air leaks after the MAF.

 

Has it got a cone filter on it?

Had exactly this problem on a friends' N-reg RS2k and as soon as the original airbox went back on, the problem went away, even after doing a KAM reset, etc...

As above though, I would check the ISCV as well out of principle to make sure it is cleaned out as these are a known problem on ALL Ford models.

BTW: correct oil for these engines in 16V form is 5W-30, 10W-40 if it was an 8V as found in the Sierra and Granada models.

 

The engine is totally standard and yes it still has the airbox fitted to it.
I think cleaning the Idle value, changing the oil and air filter are the first jobs on the list.

I had a look for the Idle control valve and couldn't locate it (sorry I'm I real novice where engines are concerned).

Do you have, or know where I can get hold of an diagram/ picture of the I4 so I can work out from that were the stuipid thing is?

The I4 does have what looks like a control value attached to the airbox so was unsure as to what that was.

I have taken some pictures of my engine and can post them later this evening if this doesn't make any sense.

Cheers for all your help on this.

Roy