Escortrs2000

My fiesta puma is running rough, kangeroos up the road in low revs hunts for an idols erratically, it used to pop when you let off the throttle but doesnt anymore? And feel like it down on power, i replaced the lambda sensor a few months back but only with a cheap one, plugged a scanner in it said its running lean?

Glenn_

iTrader: (1)

Isnt there a few lambdas on the exhaust 1 pre cat and one after the cat.

Escortrs2000

It has a 4 branch manifold and no cat, has one sensor after we're the cat was. I have just taken it out its not blocked, it just running really rough.

Brendan

iTrader: (1)

have you checked the CPS sensor?


CRANK POSITION SENSOR

Escortrs2000

Crash shaft sensor? No i havent thats what im goin to check next.

Churtz

Wouldn't run without a crankshaft position sensor. It's clearly dropped into a limp mode. My fiesta-puma used to pop and bang off the throttle, and if a sensor went wrong, into limp mode and no bangs.

I'd be plugging an obd reader into the port and seeing what the sensors are reading. The code readers which do live info are about £15!!

Matt

Brendan

iTrader: (1)

If the CPS sensor is near the end of its life it will effectively miss counting some of the teeth on the wheel this mains the EMU thinks it has found the missing tooth reference point and the timing goes way out! -> engine runs like a dog!

well this is what happened to me anyway!

Escortrs2000

Il get a code reader and see what it says and go from there, cheers for your help.