Sport turning over but not firing up??

[dark_sounds]

ok my mates brought a sport now that iv got him into the e30s lol

but the sporthas been sat there for 6 months, when we looked at it , it started up on the dot first time, ran it for half a min, then he said fuck it, and took it,

he got it trailered home and once home, he says it wont start up. it just cranks over trying to fire up and nothings happening??

also cant hear the fuel pump buzzing underneath the car?

checked fuses and relays... they are fine.

what else could it be??

cheers

[Brianmoooore]

Usual procedure - bridge out 30 and 87 of the fuel pump relay, and check for fuel at the fuel rail. Check for sparks.

[wildeian]

Check battery, or jump start it.

Other day my Tourer wouldn't start (out of the blue), flattened the battery trying.

Then bump started it, and it fired straight up. Took it on a long run to charge battery, now its fine!

[dark_sounds]

tried that Ian, used my polo to help him

Brianmoore... bridge out 30 and 87 means you just connect them together right?? so take out the reley and where pin 30 and 87 sit, you just stick some wire connecting the two???


do he check the fuel at the fuel rail at the same time?? or after??


we already checked for sparks.

[Brianmoooore]

Take the fuel pipe off at the fuel rail (not the pipe to the fuel pressure regulator - that's the return line), place the end of the pipe in a container, and bridge the relay's socket with a piece of wire.
Alternatively, just listen for the pump after you've bridged it.

[dark_sounds]

where is this located? under the rear bench behind the drivers side right?

[SPADGE]

where is this located? under the rear bench behind the drivers side right?

Its under the back seat yes
I doubt you will need to remove the seat to hear it though

[dark_sounds]

it makes a buzzing sound right? we could not hear this... no noise coming from behind at all... knackered fuel pump??

[Ziggy]

it makes a buzzing sound right? we could not hear this... no noise coming from behind at all... knackered fuel pump??

Is that with the relay bridged? The whole point of Brian's test is to help find out if it's the relay or the pump...

[dark_sounds]

oh right,,, theres an actual relay on the fuel pump?? not the relay under the bonnet? sorry being thick today

[SPADGE]

oh right,,, theres an actual relay on the fuel pump?? not the relay under the bonnet? sorry being thick today

No kidding lol
The relay is under the bonnet and not on the pump

[Ziggy]

oh right,,, theres an actual relay on the fuel pump?? not the relay under the bonnet? sorry being thick today

No; if you bridge the relay under the bonnet, that sends power directly to the pump (ie checks the function of the relay) - if the pump still doesn't make any noise, it's probably dead. Still worth checking power's getting to it though.

[Ziggy]

& another thought... how old's the car? Ie is it a twin (early) or single pump (late) setup?

[dark_sounds]

its 88 Tech 2 sport.. ?? so early/late border?

[SPADGE]

its 88 Tech 2 sport.. ?? so early/late border?

Tech 2 i believe will only have 1 pump
Either way if you can't hear the pump when bridging the relay as above, either the pump is knackered or the wiring/power feed/supply is.

[dark_sounds]

just wired up 30 znd 87 and a buzzing sound near by came on... but no sound underneath the rear bench?

[dark_sounds]

thing is ,, it was working when we looked at it,, gunk inthe petrol tank destroyed the pump maybe??

well looks like ill need a new pump then!

[SPADGE]

just wired up 30 znd 87 and a buzzing sound near by came on... but no sound underneath the rear bench?

Is there fuel coming out of the fuel supply hose to the fuel rail whilst this 'buzzing' is happening?

[dark_sounds]

i didnt take the hose off? which one is it??

[SPADGE]

i didnt take the hose off? which one is it??

As Brian said earlier remove the hose from the fuel rail nearest the bulkhead/screen end.

Just a thought has this car got any aftermarket alarms or immobilizers fitted?

[dark_sounds]

yes,,, it does, but if the immobiliser was on then it wouldnt be cranking??

[SPADGE]

yes,,, it does, but if the immobiliser was on then it wouldnt be cranking??

Just check if fuel is coming out of the supply house to the rail when the relay is bridged 1st mate.

The reason i asked about an immobilizer/alarm is because some cut the power to the fuel pump when activated and this could be faulty.

[dark_sounds]

oh.... i did remove the battery? would that have reset it?



where is this damn supply hose? you got a picture? this is pissing me off now. it seems like a simple job im overcomplicating! argh"!

[SPADGE]

oh.... i did remove the battery? would that have reset it?



where is this damn supply hose? you got a picture? this is pissing me off now. it seems like a simple job im overcomplicating! argh"!

You won't find the supply hose where i told you to look as its not there on an M20
Sorry was thinking M30
The supply hose fits onto the fuel rail directly beneath the return hose which is fitted to the fuel regulator at the front of the rail!

[Brianmoooore]

oh.... i did remove the battery? would that have reset it?

Most alarms arm on reconection of the battery.

[Brianmoooore]

yes,,, it does, but if the immobiliser was on then it wouldnt be cranking??

Most immobilisers that I've come across don't disable the starter motor.

[dark_sounds]

oh ok, so is it still possibly the immobiliser?? cutting off the fuel by not lettingthe fuel pump operate?

if so then the immobiliser needs resetting.. if it helps its an old Clifford jobby??

[Brianmoooore]

This threads changed direction considerably!
Check for 12V+ at the + terminal of the ignition coil with the ignition switch on.

[liam012]

a dodgy cps will also disable the fuel pump....

[stuartgallafant]

you sorted this yet ali?

[brightonbmw]

1 more way to see if the pump is dead just power the pump with another car battery and some wire then see whats going on