hi guys wonder if anyone may know what may be causing my sapphire cosworth 2wd to idle uneven . it sits at about 1000rpm and keep dropping then going back up, it doesnt always do it ? it an f reg, 200 block, t34, greens, someone pls advise

 

tps,cts,phase sensor,iscv(dirty),idle base setting(throttle body),co level wrong the list could go on,

when was it last set up? when did it start?have you recently changed something?



the joys of a Cossie ownership

 

i have only just purchased the car , this being my second one .looking through the recipts was last set up about 8 months ago

 

As a good start (Before ripping the whole car apart) is to take out the Idle Speed Control Valve (On the throttle body) and give it a really good clean using an aerosol of Brake Cleaner, and a tooth brush. And give the plug connections a good clean at the same time.

If that don't sort it, best take it to an expert......Where you located ????

 

cheers mate that sounds like a good start. is that the one thats held on with two screws ?? small blk box? im from essex mate

 

I would be checking the spark plugs before ripping anything apart, try Ford Motorcraft AGPS 071C plugs gapped to 0.6mm or 0.7mm and see if that sorts out your idle problem.

Mike.

 

air leak?


but sounds more down to idle valve, mixture or idle map settins.

 

Yep, that's the one. Two screw on a retaining ring.

Comes out really easily, and you can have it out, cleaned and back in, in about thirty minutes. And of course, simple things like checking the plugs go without saying.

ESSEX : If any of the local Essex guys can drag themselves away from those Essex Birds, then they'll give you a hand I'm sure.

SMITTY....... Give the guy a hand.