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Have you got the fuel pump inertia swich upright and mounted, also puch the top centre to make sure it has not clicked out as it should do it the case of an accident. Also see if the power stops there, and if so, bridge it with some wire as a temporary measure.
I am assuming you are building a K or T series, otherwise this comment maynot be relavant.
I have connected the
green and yellow marlin wire to yellow rover wire.
green marlin from ignition to white which becaomes green and pink
Although the power goes to the relays it does not come back down the green and yellow wire when the key is turned.
Ok things to check. Turn on ignition and check for 12V on the green wire. Should also get 12V on the Green/Pink at both the ECU connector and fuel pump relay.
If this is ok, it could be that the ECU is doing it's normal job. It just primes for 3 seconds until it knows engine is cranking. For testing purposes, connect the Black/Purple from the replay to Earth (instead of the ECU doing it.) If all is well, with the ignition on, you should read 12V at the Green/Yellow wire. Also check you have 12V on the Brown/Grey wire. This should be live even without the ignition.
thanks for the reply Steve, I have by passed the inertia switch just in case but it made no difference.
and yes I am making the turbo version or rather I have been trying for the last four years !
could it be a faulty relay ? I think there are four wires associated with the pump that go to the relay.
brown & white - permanent live
green & pink - switched live from second position on ignition key
yellow - goes to fuel pump - no power before or when turning the key
Black & Purple from MEMS (?) box - no power before or when turning the key
Hi John our replies crossed. Thanks as always for your help.
Ok things to check. Turn on ignition and check for 12V on the green wire. Should also get 12V on the Green/Pink at both the ECU connector and fuel pump relay.
yes I do
If this is ok, it could be that the ECU is doing it's normal job. It just primes for 3 seconds until it knows engine is cranking. For testing purposes, connect the Black/Purple from the replay to Earth (instead of the ECU doing it.)
Earthing the black purple while ignition is on, is forcing the relay to work. Providing you have a 12V perm on the brown/white (sorry, I mentioned brown grey in the last post), should get 12v at the green/yellow.
I'm off done to Ian's now (seats today yeppee!). Give me a shout on my mobile if you need any help.
Hi Steve, after spending all day on this I think it may be the relay that is at fault.
Sounds like you have exactly what I need, where are you ? or maybe you could post it and I send you a cheque. How much do you want for it ?
John (Limpabit) has offered to pop down on Saturday to help me and it would be good if I could get one for then. Alternatively I can send my very understanding wife down to the breakers with a spanner as I have to go into work this week.
It's the same as the K series. A little black box with 4 relays in it.
I went through it over the phone. The fuel pump is now working but manually earthed the relay instead of ECU. It seems to be a problem with the main relay that supplies the ECU.
after changing the relay the engine was fired up for the first time, we slipped her into 5th gear and managed to get 150 mph on the speedo !
great feeling after 4 years !
It's off to Marlin to get the body fitted on Saturday, should only take them a week I'm told. Then I'll have to start thinking about booking the dreaded SVA and tidying up some of the bits.
It's always a joy for me to watch the faces of people when there see there engine spring into life for the first time. The excitement is a great sight to watch.
