Non Starting Griff. Fuel pump not priming
Discussion
Done a few bits on the car yesterday like sorting out the one speed only heater blower and did a coolant change. When I went to start the car to put it back in the garage the bloody thing wouldn't start. The fuel pump isn't priming on the first turn of the ignition. I pushed it back in the garage and did some reading up.
I came accross this thread which sounds like my problem.
http://www.pistonheads.com/gassing/topic.asp?h=0&a...
I have located the two relays on the flying part of the loom. I held onto one at a time and turned the ignition and can feel one of them click but not the other. Ok simple test i thought it to switch them round to see if it will work in the other plug. Both the relays work but only in one plug. When connected to the mainly brown bunch of wires it doesn't click but if i switch it to the holder next to it which is mainly white wires then it does click.
Am I being stupid here or could there be a problem with the wiring going to this (ecu?) plug?
The fuel pump relay on the fuse board is clicking fine and the fuses for the pump and ecu are intact.
Any ideas?
I came accross this thread which sounds like my problem.
http://www.pistonheads.com/gassing/topic.asp?h=0&a...
I have located the two relays on the flying part of the loom. I held onto one at a time and turned the ignition and can feel one of them click but not the other. Ok simple test i thought it to switch them round to see if it will work in the other plug. Both the relays work but only in one plug. When connected to the mainly brown bunch of wires it doesn't click but if i switch it to the holder next to it which is mainly white wires then it does click.
Am I being stupid here or could there be a problem with the wiring going to this (ecu?) plug?
The fuel pump relay on the fuse board is clicking fine and the fuses for the pump and ecu are intact.
Any ideas?
black and green said:
EGB said:
John. What is this cut out switch behind the glove box. What does it look like?
Thanks.............Eddie
Inertia switch - black box about 2" x 2" with a reset button top left. Operates in the event of a sudden high 'g' load, ie crash. Visible when glove box removed.Thanks.............Eddie
Took the glove box to get to the cut out thing. However it made no difference pushing or pulling the button out so I can rule this out.
Here is a pic for future reference
Is there anything else I can do while the car is in the garage? I cant check the fuel pump as mentioned above till i can pull the car out at the weekend.
Here is a pic for future reference
Is there anything else I can do while the car is in the garage? I cant check the fuel pump as mentioned above till i can pull the car out at the weekend.
Trying to think of things that might have changed or were touched when you worked on the car.
I assume from your description that the engine turns over on the starter even if the pump isn't priming?
If it won't turn over either then possibly an immobiliser problem.
When you can get to the fuel pump try running a separate 12v feed to the pump to make sure that is not the fault.
When you had the battery disconnected did you pull the battery out and all the associated wires? Maybe something has got disturbed/disconnected. Maybe check through the wiring for loose connections or fuses to see if any have blown,
Is the fuel pump not priming the only thing you've noticed?
I assume from your description that the engine turns over on the starter even if the pump isn't priming?
If it won't turn over either then possibly an immobiliser problem.
When you can get to the fuel pump try running a separate 12v feed to the pump to make sure that is not the fault.
When you had the battery disconnected did you pull the battery out and all the associated wires? Maybe something has got disturbed/disconnected. Maybe check through the wiring for loose connections or fuses to see if any have blown,
Is the fuel pump not priming the only thing you've noticed?
Yes it only seems the fuel pump thats the problem. The car turns over and ran very breifly on the remaining fuel in the fuel rail before dying. Now whenever I turn the ingintion everything is fine except that the fuel pub doesn't prime.
I have had the battey on and off a fair few times recently and haven't knock anything so I have no idea whats going on with it. If when I get a chance this weekend I give the pump 12v and it does work where does that leave me?
I have had the battey on and off a fair few times recently and haven't knock anything so I have no idea whats going on with it. If when I get a chance this weekend I give the pump 12v and it does work where does that leave me?
Dont use any relays for testing, normal ones dont have the protection diodes in them to stop the realy damaging the ECU when it switches. Check the initial sequence when the ignition is turn on (dont start). The main relay and fuel pump relay should both click shut at the same time, and then after a couple of seconds the pump relay should drop out. If the main relay does not close to start with, it wont supply the pump relay.
Do either relays click in? If there is no action at all, Id be looking at the ignition supply to the ECU loom, as this supplies the 12 volts onto the main relay first, and the ECU then grounds the other side of the coil to energise the relay, (this then puts 12 volts on the fuel pump relay that the ECU then grounds). Basically you are looking at loss of supply, broken connections to the ECU, or faulty ECU. Wiring diagram of the 14cux loom here:
http://www.g33.co.uk/images/PDFS/14cux_fuel_inject...
http://www.g33.co.uk/images/PDFS/14cux_fuel_inject...
Edited by blitzracing on Friday 18th November 19:03
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