I have tried the corsa forum,

Basically, guy put diesel in it, only a gallon, before setting off from petrol station, filled it up with petrol to dilute it. Then drove the 7 miles home fine.

Then drained tank and refilled with petrol. He said it ran rough. So i bought it back. Drove it for nearly a week without a problem.

About 4 days ago, the car seemed to drop onto 2 cylinders and fluctuating idle from 500-1000RPM.

Ive changed plugs, coil, leads, Engine loom, map sensor, TPS is working fine as tested using my snap on scanner.

No codes are present,

It is PERFECT when cold, it varies on when it plays up but can be anywhere between 2 and 5 miles from starting when cold.

What could it be?

Exhaust backbox blocked? (No middle box but wouldnt it cause a loss in power all the time?),
Fuel Filter?
Injectors (But wouldnt it cause a problem all the time?)

Im really getting narked off with this now,

 

cts, could be unrelated to mis fuel?????????????

 

The CTS was changed last year, so was the one which registers on the dash. THe snap on scanner reads the CTS and its consistant with the dash one so nothing drastically wrong there.

 

is the dash sensor associated with the engine management cts???

for what they cost i would repalce it again

 

No but i was testing them against each other ie, CTS for the EM read 90 degrees when the CTS for the dash sais approx 92. I might replace them again if all else fails but the ECU CTS is none to cause an erratic idle all the time when it goes,

 

what engine?what year?

 

Hi,
Me and me lad are coming your way in the week, hows the white beats going ?
tabetha

 

Tab, we wont be there monday chap, any other day is fine. White beast is still sat there.

 

X16XE on a 1996 plate.

 

have you checked the egr valve?make sure the cat has not broken up and got stuck in the valve

 

you changed all that lot, but never changed the fuel filter or checked the injectors? hmm! lol