EFI Problems

[gruffalo]

Just a quick question.

Having problems with a 3.9 EFI RR. it seems that the injectors are being held open and flooding the car. If I disconect the fuel pump I can get it to cough and splutter but if I reconnect it just dumps more than enough fuel into the pots, all of them.

Does any one have any idea of what is likely, this has happened after a month of not being used but she was running fine before?

Cheers

[100SRV]

Have you tried another ECU? IIRC the power transistors for each bank switch to ground so it sounds like both could be damaged.

Also check the harness for damage and the ECU connector for debris.

100SRV

[eliot]

Many ECU's work the same way, i.e. live feed to one side and the ECU grounds the other side.
The injectors are wired together in groups of four, left bank and right bank.
Disconnect all the connectors and determine if both sides are being held on or just one side.

I would reccomend changing the oil, because if even 4 injectors are being held open - it will put a huge amount of fuel in the cylinders - which also risks hydro(petro?)-locking the engine.

This engine had fuel in the oil which wrecked all the main bearings:

[gruffalo]

Thanks Eliot, will take a better look, once I get it going again will defo change the oil, good tip that thanks.