3.9 efi flat spot

paul c · Post by **paul c** » Sun Jul 05, 2009 4:10 am

I have a 3.9 injected Disco I want to swap the engine into my 110, but it has a flat spot off idle. It is getting low on fuel but unless the pump is weak that shouldnt be a problem. I havent had it running for any length of time but it does seem to get a bit better as it gets warmer. Any usual diagnosis before I get too serious with it?
Thanks

Tricky · Post by **Tricky** » Sun Jul 05, 2009 7:06 am

Check the coolant temp sensor for the ECU its behind the dissy they give problems It may be faulty telling the ECU the wrong temp therfore not running rich enough when engine cold

paul c · Post by **paul c** » Tue Aug 11, 2009 8:23 am

Seems it may just have been fuel pressure, put 20l into the tank today and it seemed to be running better

daxtojeiro · Post by **daxtojeiro** » Wed Aug 19, 2009 9:29 am

does the disc have a fuel tank suitable for EFI? Carb tanks need a swirl pot adding for exactly that reason, fuel starvation at low levels.
Phil