Can anyone suggest what the problem could be?
My girlfriend drives a Corsa 1.4 it's a fairly nippy car around the town but recently it's occurred a problem.
Unexpectly while driving say 30mph / third gear (not under or over reving) the car stutters and swiftly you must hit the clutch to ease the engine then it will be fine again.
She took the car to a local garage where they discovered the fuel mixture was to rich so that was altered via the CPU, the mechanic replaced the spark plugs (even though the old ones had only seen 8k miles) also she recently filled the car with a full tank of petrol and it was suggested she may of purchased dirty fuel so an addictive was poured into the fuel tank. (What could that of been?)
For the next 60 miles the car was back to its old self but the next day guess what?! Yeap the stuttering reappeared so she left the car at home. Strangely enough tonight after leaving the car alone for 2 days I gave the car a welly around the block and all seems fine again.
So what could the problem be?
I've been told by non-experts it could either be: -
1) Dirty fuel 2) Knocking sensor on the way out 3) Fuel injector broken 4) My girlfriend is a car breakerPlease help!