newby need a little advice rover 3.9 efi

chris.rawe · Post by **chris.rawe** » Tue Aug 04, 2009 11:57 am

hey all new to all this but reading a lot so picking it up slowly. i have a rebiult 3.9 efi hotwire type injection system in my defender (wasn't in there before) going great edis in and installed coil packs etc, the only trouble i have is the engine position for the ecu does it remain on the negative side of the distributor or can it be taken from an output on edis? of mjlj? i wanted to get rid of the distributor alltogether but if it has to stay then it has to stay... any help would be great....

cheers
chris

Gilesy998 · Post by **Gilesy998** » Tue Aug 04, 2009 12:40 pm

Temporarily try using the tach output pin on the ECU, that's exactly the same as the EDIS' pin 11. That *should* works, as it's just a short to ground upon each ignition event, much like what the factory dizzy/coil connection shows. Failing that, leave the dizzy in place, just to give the ECU a signal

chris.rawe · Post by **chris.rawe** » Tue Aug 04, 2009 1:20 pm

fantastic manythanks i'll bullit connect that up and see as well as connecting up the dizzy so if one doesn't work i can quickly swap it over, many thanks

NITROPIXIE · Post by **NITROPIXIE** » Tue Aug 04, 2009 5:41 pm

you could also use the diode trick at the coil packs.

http://www.autosportlabs.net/MJLJ_V4_ve ... back_pulse

if that doesn't work

TwoSheds · Post by **TwoSheds** » Tue Aug 04, 2009 8:02 pm

NITROPIXIE wrote:you could also use the diode trick at the coil packs.

http://www.autosportlabs.net/MJLJ_V4_ve ... back_pulse

if that doesn't work

The above works nicely - you just need four diodes (one for each coil) rather than two.