I have a problem with one of my V8s - it has been running sweetly all year but has suddenly gone into 'grumpy mode' again.
I took the car to a mechanic here in the Isle of Man - he told me it was missing on two cylinders and that he changed the spark plugs. Unfortunately he is away this weekend so when I picked the car up this morning, I couldn't tell him that the car is just as rubbish as it was when I dropped it off.
Is the V8 engine fussy about its plugs?
I'm no mechanic but I am a decent troubleshooter so I decided to eliminate the fault, even if I can't resolve it.
I disconnected the fuel line and there seems to be plenty of fuel issuing. The electric fuel pump sounds the same as it always does.
I know it isn't poor air supply.
This car has had the wrong firing order in the past and I know what that does - I believe the firing order is correct.
The engine sounds very sweet when running idle and it isn't lumpy or rough.
This car had the carburettors rebuilt in January and it has been sweet ever since. I am very, very suspicious of the spark plugs - they might be of the wrong kind - maybe making very weak sparks. I can't see it being one of the carburettors because the engine would be uneven and the problem would come and go as the stuck float/jammed needle/<insert failed component of choice> would move about within the chamber.
Any ideas why my car is poorly again?
I took the car to a mechanic here in the Isle of Man - he told me it was missing on two cylinders and that he changed the spark plugs. Unfortunately he is away this weekend so when I picked the car up this morning, I couldn't tell him that the car is just as rubbish as it was when I dropped it off.
Is the V8 engine fussy about its plugs?
I'm no mechanic but I am a decent troubleshooter so I decided to eliminate the fault, even if I can't resolve it.
I disconnected the fuel line and there seems to be plenty of fuel issuing. The electric fuel pump sounds the same as it always does.
I know it isn't poor air supply.
This car has had the wrong firing order in the past and I know what that does - I believe the firing order is correct.
The engine sounds very sweet when running idle and it isn't lumpy or rough.
This car had the carburettors rebuilt in January and it has been sweet ever since. I am very, very suspicious of the spark plugs - they might be of the wrong kind - maybe making very weak sparks. I can't see it being one of the carburettors because the engine would be uneven and the problem would come and go as the stuck float/jammed needle/<insert failed component of choice> would move about within the chamber.
Any ideas why my car is poorly again?