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Please Help. No Start!

Mumbo#5

By Mumbo#5,
in General Maintenance

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Mumbo#5 Collaborator

Mumbo#5

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Posted (edited)

Ok, here goes:

This morning driving on my way to work I decided to do a bit of a town cruise (was running early for once) anyways the car was running fine, pulled into a parking spot where I work, and what'd ya know the car stalls. I presumed it was just the bov leaking air causing it to intermittently stall, so I tried clutch starting it and no go. Cranked it over a few times, no go. All the lights on the dash are fine, nothing abnormal.

I was leaning towards something that triggers the fuel pump. I have checked the injectors for pulse (using one of those thingers with the light) and I have check for spark (bodgy way but we wont go there)

Now i know its got injector pulse and spark, I was looking at all the fuses that had anything to do with the ECU/fuel pump setup, nothing blown at all - damn. I then went on to test the power to the pump, now it seems that the pump isnt getting power (there were 5 wires, 2 sender ones and 3 pump ones i think) checked them all while cranking/ign and no power.

Can anyone point me in the right direction? Should I just try and externally hook up 12V to the pump to make sure the pump isnt f**ked? Or is there a relay I didnt look at/test while I was at it.

If anyone can shed some light on this please help as my car is sitting in my workshop.. well my boss's workshop haha :D

Thanks in advance

P.S. If anyone has the wiring diagrams for the pump etc please post or email. :)

edit:shpelling

Edited by Mumbo#5
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https://www.sau.com.au/forums/topic/99226-please-help-no-start/
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SteveL Mentor

SteveL

Posted
Posted

It's been awhile since I looked at one of these but I believe there's a fuel pump relay near the ECU - behind the passenger side kick panel. The relay is green from memory. Actually there might even be 2 relays that look the same, but only one is for the pump. Anyway, worth a check. Also if you have access to a multimeter you could check for +12V on any wires associated with the pump or the relay (ign on, of course).

BH_SLO32 Proficient

BH_SLO32

Posted
Posted (edited)

What car do you have, R32 or R33? The fuel pump relay is located in the passenger footwell on the R32's (behind the ECU) but in the boot (near the battery) in the R33's.

Can you hear the pump prime when you first turn the key to the ON position? The fuel pump will prime for a couple of seconds and then stop.

Are you sure an intercooler hose or similar hasn't come loose? A major air leak will prevent the car from starting.

If the piping is ok check the power to the pump when the key is first switched to the ON position (only lasts a couple of seconds). If no power is present then check the relay. PIN18 on the ECU (R32 & R33) earths the relay coil. You will need to check the main power feed to the relay and the voltage at PIN18 when you first switch the key to the ON position. If the ECU has earthed the relay (switched the pump on) you should see 0V otherwise there should probably be battery voltage (I have to check).

Hope this helps.

Cheers

Edited by BH_SLO32

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