318 e46 2002 misfiring at 120km/h

[Adi]

318 e46 2002 model all coils replaced, misfires at around 120km/h eml light comes on.....fault, computer says misfires on all 4 cylinders, any ideas on cause? Only does it when driving 120km/h

 

[Bryden02]

HI Adi
How is the cars overall performance, if it is a bit sluggish then check fuel filter or check the fuel pressure.Fuel filters are often overlooked when carrying out inspection services.
Also check engine oil condition, these engine are prone to sludging if a service was skipped.
What are the condition of the spark plugs?
Has this problem occurred suddenly or gradually?
I would check out these basics things first, before getting mislead with diagnostics.The misfires on all cylinders could just be secondary faults caused by some other ageing or failing component.

 

[Adi]

up to date service with top oil......done religiously! performance otherwise 100%

 

[zaleonardz]

crank sensor...

 

[Adi]

Thanx this shall be my Saturday morning project.......see if it is the sensor...

 

[zaleonardz]

Remember to check for pidgeons...

 

[Dr Evil]

Remember to check for pidgeons...

Forgive my stupidity Leonard, but what's a pigeon?

 

[rick540]

Misfires on all four...

Fuel pressure

Air leak

O2 sensor

 

[Adi]

fuel pressure, doubt it....misfire is intermittent, might be O2 sensor....

 

[zaleonardz]

Lol Dude,

Thats just me being me, pidgeon in cylinder 3 would cause it to behave irratically,

Pay no attention to me :fencelook:

Remember to check for pidgeons...

Forgive my stupidity Leonard, but what's a pigeon?