3.9 EFI: No power

lollorock · Post by **lollorock** » Sun Apr 13, 2014 9:06 pm

At this point I hope it is the damaged wiring.

With the noid lamp I can see if the signal does not come to an injector ... or not?

DaveEFI · Post by **DaveEFI** » Mon Apr 14, 2014 8:39 am

The injectors are in two banks of 4 - left and right - with a driver for each bank. Each injector has a series resistor in the +12v feed - the driver grounds the bank to complete the circuit. So all the grounds to each bank are connected together inside the ECU. This might help:-

lollorock · Post by **lollorock** » Mon Apr 14, 2014 2:43 pm

DaveEFI · Post by **DaveEFI** » Mon Apr 14, 2014 2:48 pm

Is that good or bad?

Captainbeaky · Post by **Captainbeaky** » Tue Apr 15, 2014 9:22 pm

If you do not have a noid light handy, listen to the injectors with a long screwdriver.

Place the head of the screwdriver on the injector, and the handle I your ear.

If the injector is working, you will hear it clicking.

lollorock · Post by **lollorock** » Tue Jul 01, 2014 1:56 pm

Captainbeaky wrote:It sounds like you have a petrol injector stuck open ( or more correctly, being commanded open permanently)

I have had reliability issues with the injector emulators before on my 1991 RRC on LPG - they use relays that can stick - and short out a bank of injectors. Also prone to water ingress.

You may well have a problem with these emulators, or their wiring.

and the winner is...