when running if i remove the oil filler cap the car carrys on running is this a bad sign???

 

It should stall

I would check all breather pipes are free of blockage - be careful as they snap easily!!

 

As above check all breather pipes (No James, Im not stalking you're posts ),the main one I was always told to check is the pipe from the back of the rocker cover down to the sump.Regards Micky

 

Why should the car stall??? Should a fiesta turbo engine stall??? cause i have fiesta turbo engine in my cab and it dosnt stall with the oil cap off.

 

A Fiesta wont stall as it runs EFI,but a ERST is on MFI and should stall if running correctly.Regards Micky

 

A standard engine as said should stall, have you got a different breather set up? I've disconnected my breather system from the air box just to eliminate the whole engine as a potential air leak.

 

all opinions and advice matters here mate

 

A standard car should stall as the fueling system requires a sealed system and you are basically introducing a massive air-leak.

If you have a modified breather system you can run a non-sealed system but the fueling needs adjusting to suit. My car is on MFi and doesn't stall if you remove the oil cap.

A Fiesta is EFi so I would imagine you could remove the oil cap without it stalling.

 

its totally standard even down to the air filter i was thinking along the lines of the breather system but then someone kept saying rings it has done 11600 miles but like i said is totally standard..... i aint brought it yet cao im tryin to find a good shell to reshell it into cos its rotten as a pear

 

I did have an RS i bought a long while back before i really knew anything and im sure the rings were gone cos it smoked like a bitch u could follow the trail of smoke and find me it was that bad, and that would run with the cap off. It was RAPID though

If your rings were gone i would think you would be seeing other symptoms like excessive breathing and smoking out of the exhaust.

 

thats the funny thing it dont smoke lol..... looks like im not bothering now cant find a good enough shell for the rite price got my eye on summat else now lol

 

If it doesn't stall, but is MFI with standard breathing, then it's just simply running rich.