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[amba]

Have got a intermittant starting problem which  I seem to have traced back to the relay inside the engine bay compartment.

There is 2 mauve relays which seem to control the fuel pump and the injectors and advise seems to suggest it would be wise and probably as easy just to replace the 2 and be done with it .

Are these a main dealer part...? and if so has anybody got access to the GM part numbers or can these be sourced elsewhere.

Dont think it would be wise going down the second hand route but eill accept any advise please 

[kenny71]

they should be easy to get..just got 2 the other day from auto store paid 10 dollars for each

[amba]

That is on your side of the "pond"..though

[I_want_an_Omega]

Hi Andrew,

I'm fairly certain that I have a complete spare V6 fuse box rescued from a '98 car before I scrapped it. You are welcome to those relays for the price of the postage if that helps?

Let me know & I'll have a rummage in the garage ......

Rob

[Elite Pete]

And if Rob hasn't got them I know I have

[amba]

Many thanks for offer of help...Rob @ Pete.

Think I am sorted now as needed to get them sourced today as didn,t want to risk breaking down again today,so found local breaker which I have got them from so fingers crossed they are the problem.

Not sure how likely my problem is to be the relays or the actual pump...car wouldnt start on several occasions recently but after wiggling the violet coloured relays  in the relay box ,it fired into life so am thinking 1 of them is probably sticking or just "tired" and as they are the easiest parts to replace first that will be my plan.

[symes]

chech your loom plugs by battery mate they can cause your problem-in fact on my miggy it even bought up Gearbox Fault on MID and also when engine running you could move one loom connector and stop engine opened them up and closed up terminal connectors on female end and job done

[amba]

Thanks for "heads-up".

I will have a good look in the morning when I replace the 2 relays.

[amba]

Sorry to drag this back up but just need a bit more info.

Replaced both relays and car started and ran fine for couple of days  then started playing up again  ,but managed to get it to fire into life by "thumping" the underside of the fuel tank.

As it now seemed to point conclusively to the pump I  have replaced it with another.

What I would appreciate is some advise as to how reliable are these electric fuel pumps and has anybody else had issues with the fuel pump.

[Nick W]

The pump runs all the time the engine is. It's a small electric motor, pumping fuel at over 3bar.
These cars are now at the age when having to change a fuel pump should be considered a perfectly reasonable expectation. Fit a new one, otherwise you're just shifting the problem into the future.

[amba]

Wise words,Nick.

Thanks 

[I_want_an_Omega]

The pump runs all the time the engine is. It's a small electric motor, pumping fuel at over 3bar.
These cars are now at the age when having to change a fuel pump should be considered a perfectly reasonable expectation. Fit a new one, otherwise you're just shifting the problem into the future.

+1

Unless of course you can get one from a low miles breaker

[Lazydocker]

I assume you've read the codes and there isn't a Crank Sensor code?

Sa for the in tank pump... I thought they were very reliable but it could be the fault. I'd be looking very carefully before spending money though as you've now doing 2 different "cures" for the fault (Which, incidentally, is a classic symptom of Crankshaft Sensor Failing )

[amba]

LD...no fuel was present when I removed the fuel pipes from the engine when cranking over.

Car started on several occasions when the relays were pushed/pulled around but despite them being replaced with new problem was still there.

Fuel pump has now been replaced and car started.No fault codes are present,although slightly worrying is when I connected the old pump up to 12v it ran but I am suspecting it was getting a tad "lazy" and would stick.

Thanks for all the usefull info guys and I hope the problem is now cured.

[05omegav6]

My pump failed about 2k after the crank sensor

I think this was because I had been trying to churn the engine over alot for about two weeks prior to sorting the crank sensor, and had also managed to run it dry a couple or four times 

Current pump, a pattern one has been in for 110k, original managed about 125k