VR6 cut out and won't restart

[dalhalvaig 0]

Had the car in today to get discs and callipers replaced. Picked it up to drive home. Car started OK, drove for about half a mile then lost power and cut out. Coasted to the side of the road and tried to restart. Engine turned over but didn't fire.

 

Called garage who came and towed me back in. Checked we had a spark...OK. Checked that the cams were turning...just in case chains had gone...looking inside the cam cover through the oil filler, could see cams turning...OK

 

Tried restarted at various points through these checks. Engine seemed to be on point of catching, but just wouldn't. Seemed to be improving as time went on but still didn't catch

 

I think it is a fuel problem and am thinking the following...

Could it be that with all the stationary running when bleeding the brakes, that the fuel has got a vapour lock? When I picked it up they had been out checking the brakes and the fans were cutting in and out constantly, then it was switched off. It was stationary for about 5mins while I settled up. So there might have been a chance for some heat soak.

Could it be a fuse or relay of the pump?

Could it be the pump itself?

 

Leaving the car overnight to see if it will restart.

 

Any thoughts?

 

Cheers

 

D

 

 

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[easypops 8]

The fuel pump relay and ecu relay are worth checking but I'm unsure if they would suffer an instant failure like you had, can't see why not though

[dalhalvaig 0]

I am wondering fuel pump relay. I think if it was ECU relay then I wouldn't get a spark.

 

That or fuel vapourizing, but I wonder if that would happen when the engine is running.

 

Thanks

 

 

 

 

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[easypops 8]

Unsure but I'd think you are right, I could give you a loan of a known working relay if you want to come and get it?

[dalhalvaig 0]

Thanks, might take you up on that tomorrow, on Dad's taxi duty tonight and waiting the call!

 

 

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[easypops 8]

Ok mate, I'm also up fairly late tonight if you like :)

[Dox 23]

If you disconnect the fuel line to the injector rail it will be easy to see if you have a supply to the injectors.

[dalhalvaig 0]

Good thinking, Dox. Will try in the morning. Car at garage just now.

 

 

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[robrado974 1]

Be careful , if there is pressure there , you could end up with a face full of fuel . Slowly does it .

[fla 9]

Easier to disconnect the coilpack so there's no spark, turn it over and remove the plugs to see if they're wet with fuel. I agree though it does seem an electrical issue with it just dying as is. You can bridge the relays if you don't have a replacement - just check the contacts for each to see which need bridging. But remember to remove the wire afterwards!

Test the 109 and 167 relays with continuous power rather than pulsing them and shake them around just in case there a loose connection inside somewhere.

[dalhalvaig 0]

Right...thanks for the suggestions. We've tried the relays and checked the circuits and all is good. So we are concluding that the fuel pump is the problem. I'm looking for a replacement pump. Has anyone got one spare?

 

Cheers

 

D

 

 

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[fendervg 32]

Fuel pressure regulator is worth a try.

[dalhalvaig 0]

Corrado lives. New fuel pump. Happy Corrado.

 

 

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[easypops 8]

Nice one, that's something you won't need to worry about for a long time :)

[robrado974 1]

Good news , glad you got it sorted .

[fendervg 32]

Great stuff

[seanl82 23]

Corrado lives. New fuel pump. Happy Corrado.

 

 

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Glad you got it sorted! Out of interest, where did you get a new pump from?

[fendervg 32]

Glad you got it sorted! Out of interest, where did you get a new pump from?

 

Me too

[dalhalvaig 0]

Sorry for the delay in responding.

 

I'll need to check with the garage about where they got the pump we used.

 

What we discovered was that on the first pump and the second pump we got, was that the sender unit part which has the external connector and the hoses running to and from the engine was different to the one on the car. This is the bit visible on the top of the tank, held in place with the the big black securing nut. So after the second one arrived I got the garage to take the pump out of the tank as I was hoping that we could perhaps swap the actual pump over within the housings. What they discovered was that the pump unit inside the tank was the same as the one that had been delivered, so they swapped the new pump and in tank hoses and wires with the old non functioning pump and kept the sender unit.

 

I had real difficulty finding the pump as first of all we were put off the trail by the different sender units, and also the local dealer (credit due) concluded that VW had stopped supplying in 2015, but they phoned back to say that they think that the parts system says there are still up to three original parts around in dealers. They also said that he part number they found on the system was for chassis numbers older than my car. This might explain the problems I had. Perhaps VW changed the sender unit on the late cars.

 

They said the part number is 1H0 919 651Q

and the dealer phone numbers are

0116 242 8500

0161 480 6695

01753 486500

Cost - about £255, can't remember if that was with or without VAT.

 

I'm not sure where the garage sourced my pump, but will call on Monday and find out.

The first pump we got was from Eurocarparts and can be found here, it was the Haas part

http://www.eurocarparts.com/fuel-pump

I never saw it but if it is the same as the picture, then that would have been fine.

 

The part number on the actual pump which was in the tank, stamped into the aluminium body is 1H0 906 091 C

 

Hope this helps

[fendervg 32]

Excellent stuff. I have a thread on here about my fuel pump and pressure saga so it will be interesting to compare the part numbers. I knew about the gauge sender float problem.