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**autofitservices** · 17th May 2015, 20:04

Are you getting enough pressure to the rail Jeff just with you saying its not coming through the injectors? could suggest blockage in the fuel lines or filter maybe? as for the power issue the cut off hasnt tripped or anything stupid like that has it? also i knew of an efi years ago had a fuel pump wire issue im sure it was near the rear wheel arch were a bit of harness can split if I can remember that far back lol.

**autofitservices** · 17th May 2015, 20:16

failing all that just out of interest you should see if will fire on a little squirt of easy start as if it does it has to be an easy fix but if it doesn't it may suggest ecu/ecu wiring fault. The odd thing is it sounds like the car has switched its fuel off to protect itself as when your priming the pump and still not starting that suggest 2 separate faults but to happen at the exact same time is very unlikely. It sounds like some things down it knows it so its turned the fuel off, what about oil pressure switch does this work the same as the turbo model were it will kill the fuel if it detects low pressure?

**mgt16** · 17th May 2015, 22:34

Iirc the oil pressure switch is also involved in the emergency cut off side of things so may be worth checking.

**G Force** · 18th May 2015, 11:46

Hi Jeff I know you have changed the relays but it does sound like an EFI main relay problem doesn't it?

Have you swapped the two silver bosch relays for known working identical type relays Jeff?

Can you hear the stepper motor rattle when you switch the ignition on for the first time and when you turn off? If you don't hear the stepper motor rattle you have a fair idea that the electrical circuit between the car and, the EFI ECU and the EFI relay or the EFI ECU its self or EFI relay its self, are where the problem is.

You would then have to check out the associated live feeds and earths with these components.

Cheers, Gary

**Jeff Turbo** · 18th May 2015, 12:50

Originally posted by G Force View Post

Hi Jeff I know you have changed the relays but it does sound like an EFI main relay problem doesn't it?

Have you swapped the two silver bosch relays for known working identical type relays Jeff?

Can you hear the stepper motor rattle when you switch the ignition on for the first time and when you turn off? If you don't hear the stepper motor rattle you have a fair idea that the electrical circuit between the car and, the EFI ECU and the EFI relay or the EFI ECU its self or EFI relay its self, are where the problem is.

You would then have to check out the associated live feeds and earths with these components.

Cheers, Gary

Hi Gary
The stepper motor does sound when the ignition is switch on. I am trying another fuel ecu with the same part number on the car later in the week but as you say it does sound like the relay isn't working. I have swopped both relays but will try again.
My next job is to plug in a fast check for electronic ignition that should cover the fuel system, hopefully that should point me in the right direction as i'm a bit stumped atm.
I'm studying the complete wiring diagram to eliminate everything else, but it all seems to go back to either the fuel ecu or relay's
Autofitservices
I don't think the oil switch has much to do with the fuel system on an efi. It does affect the Turbo though as you say.

**G Force** · 19th May 2015, 11:31

Originally posted by Jeff Turbo View Post

I removed the fuel rail and left the injectors connected but fuel didn't blast out from them but the pump is working as ive 'live wired' it and it's pumping.

Hi Jeff

Was the above test carried out when cranking?

The EFI ECU switches the Main EFI relay on and off, but the Main EFI relay powers up other circuits within the EFI ECU. So in a nut shell the EFI ECU turns its self on and off via the main EFI relay.

It is good news that the stepper motor can be heard because this means the EFI Relay is working and it is being controlled to some degree by the EFI ECU. That is not to say the EFI ECU doesn't have a fault in its other control systems or the associated wiring or the wrong type main relay.

Depending on the answer to my above question about your quote and the correct type relays are fitted, the fault should be in the wiring between ECU and the fuel pump relay, or a faulty fuel pump relay or EFI ECU.

Cheers

**Jeff Turbo** · 19th May 2015, 14:25

Originally posted by G Force View Post

Hi Jeff

Was the above test carried out when cranking?

The EFI ECU switches the Main EFI relay on and off, but the Main EFI relay powers up other circuits within the EFI ECU. So in a nut shell the EFI ECU turns its self on and off via the main EFI relay.

It is good news that the stepper motor can be heard because this means the EFI Relay is working and it is being controlled to some degree by the EFI ECU. That is not to say the EFI ECU doesn't have a fault in its other control systems or the associated wiring or the wrong type main relay.

Depending on the answer to my above question about your quote and the correct type relays are fitted, the fault should be in the wiring between ECU and the fuel pump relay, or a faulty fuel pump relay or EFI ECU.

Cheers

Hi Gary
Yes it was cranking over, live wired the pump so that was working but the injectors didn't squirt any petrol out.
I also tried adding wires straight to the pump from an earth and live to the resistor to see if it would prime
Will be having another look see hopefully later in the week and will report back.

**G Force** · 20th May 2015, 10:38

Originally posted by Jeff Turbo View Post

Hi Gary
Yes it was cranking over, live wired the pump so that was working but the injectors didn't squirt any petrol out.
I also tried adding wires straight to the pump from an earth and live to the resistor to see if it would prime
Will be having another look see hopefully later in the week and will report back.

Hi Jeff.

If it was only a fuel pump issue the injectors would have operated when you cranked over with the rail primed. So you can assume the problem to be the wiring between the main relay and EFI ECU or ECU earths or a faulty EFI ECU or incorrect main relay.

Unless of course you are unlucky enough to have more than one fault.

The fuel pump resistor is in series with the pump, so both sides of the resistor are affectively live.

Gary

**Jeff Turbo** · 25th May 2015, 13:51

Its alive. The problem was both relays and both of the ones I replaced them with and the fuel resistor.
All working now but misses.
Checked injectors, changed plugs and distributor cap. Haven't changed the leads yet but all plugs are sparking but it's still missing a bit.
I have a feeling it might be stale fuel.

**G Force** · 25th May 2015, 18:22

Hi Jeff, nice to hear you have it running.

How long has the fuel been in? Petrol can go off in as little as 9 to 12 months.

**Jeff Turbo** · 25th May 2015, 19:58

Originally posted by G Force View Post

Hi Jeff, nice to hear you have it running.

How long has the fuel been in? Petrol can go off in as little as 9 to 12 months.

Thanks Gary
There was power into the relays but not out so was in the end an easy find.
Easy when you bring testers with you this time lol

As far as im aware, about 4 years so it's well off so there is a possibility of one of the injectors not working fully

**Jeff Turbo** · 4th June 2015, 17:57

The car has now passed it's MOT but it's still missing a little. Hoping that fresh petrol and injection cleaner will sort it eventually as my son's will be using it quite often

**Jeff Turbo** · 7th June 2015, 11:40

Still running rough,
Number one plug is wet with petrol but all others are dry. Changed the plug and lead but still wet.
When I get back from holiday I will do a compression test and see where that leads but the head may have to come off to check the valves.

**mgdavid** · 8th June 2015, 00:43

could be a bad contact or electrical path breakdown within the dizzy cap for that cylinder?

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