XJ6 3.2 petrol 1995. Overfueling

[Brent Lord]

Not familiar with jags but need some guidance with this one. Don't have any ways of talking to ecu and don't know what tools do.. Car when it starts overfuels to the point you can see the unburnt fuel out the back and gasses up the plugs. Any advise other than burn it welcome

Brent

[y_u_dizzy]

1 is the car missfiring
2 is the return pipe ok to the fuel tank ( just an idea )

[KevMT]

Brent,

I think i would scope an injector and look at its duration first to see it its being driven rich by the PCM and then take it from their.

[Angus]

Brent

Did you check the fuel pressure reg?

[Will H]

Hi Brent
Just keep an eye out, or a nose to the engine oil quality. This type of condition could contaminate/dilute the oil during the over fueling condition.

[coup10]

Had one a while back which was a non runner, plugs kept fouling up, eventually got it to start after excessive cranking.
Knocking engine off it would start again no problem with no fouling, once cooled it would foul again.

The cause turned out to be water in the fuel.

Turned out that under the fuel fuel filler flap is a water drain pipe drain and this was blocked, so under the flap would fill with water and every time the flap was opened to fill with fuel (which was quite often) the build up of water would run into the filler pipe and eventually diluted the fuel with water to the point that it would not ignite and kept fouling the plugs.

Worth trying a separate fuel feed feed so as to test it