Car died on the way home, need suggestions please. FIX FOUND

chrons_rotary · Postby **chrons_rotary** » Mon Jun 22, 2015 6:30 pm

I was driving home and the car started to drop out a bit, tacho was dropping to 0 rpm then coming back up, oil pressure gauge dropping to zero aswell.
I pulled over and turned the car off then back on, but wouldnt start.
Car has a MS2PNP, aswell as a NB8B engine swap and custom turbo kit.
I've traced through the US wiring diagram as i couldn't find a AU wiring diagram.

Things ive checked:
-Pretty much all other electrical things work fine: headlights/interior lights work, dash lights work, car cranks over.
-Fuel pump relay has no voltage to coil or line side of contacts (cabin wire colour white/red).
-BTM Fuse has 12v to both sides (Engine bay wire colour white/red)
-Could not find any blown fuses under bonnet or near drivers kick panel.
-Found that the ECU (MS2PNP) has no power either.

Any suggestions will be much appreciated.

EDIT- Ended up being the FUEL INJ relay. Pulled it apart and found when the coil was energized there was a very small air gap between the contact pads, about 1/4 of a mm.

davekmoore · Postby **davekmoore** » Mon Jun 22, 2015 11:29 pm

It would seem it's a good idea to carry a spare EFI relay. Perhaps also a cam angle sensor (CAS). Neither is all that expensive. I'm also carrying spare plugs at the moment, but that's more because I know the car is running way too rich.

Might also be worth considering that after blowing one EFI relay mine blew several more until a great auto elec traced all the wiring back from it, discovered some burnt out wiring and terminals and sorted them all out.

chrons_rotary · Postby **chrons_rotary** » Tue Jun 23, 2015 1:51 am

davekmoore wrote:It would seem it's a good idea to carry a spare EFI relay. Perhaps also a cam angle sensor (CAS). Neither is all that expensive. I'm also carrying spare plugs at the moment, but that's more because I know the car is running way too rich.

Might also be worth considering that after blowing one EFI relay mine blew several more until a great auto elec traced all the wiring back from it, discovered some burnt out wiring and terminals and sorted them all out.

I will be getting a new relay, but for the time being i just bent the contact arm so it will close the circuit when energized.
The contacts didn't seem burnt at all, could have just been the heating/cooling that warped the contact arm.