406 HDI Diesel fuel cut off solenoid

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406 HDI Diesel fuel cut off solenoid

Postby Meldrew » Sun Oct 10, 2010 7:55 pm

My '99 1.9 HDI will crank over but not start, and no fuel is getting to injectors.
There must be a fuel on / off solenoid somewhere that starts and stops the engine by switching fuel on or off to fuel hp pump. which could have failed in the off position.

Anyone had this problem, or know where the solenoid is situated as I am desperate to fix it as I work 45 miles away and need it badly,
Peugeut 406 Hdi, Toyota mr2, Lomax Trike kit car,Suzuki 1200 Bandit, Avondale caravan. Oh Peugeot cycle as well.
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406 HDI Diesel fuel cut off solenoid

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Re: 406 HDI Diesel fuel cut off solenoid

Postby puggy » Sun Oct 10, 2010 8:59 pm

lift pump in the fuel tank ????
.. ooh are those drugs for me Matron
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Re: 406 HDI Diesel fuel cut off solenoid

Postby steve_earwig » Sun Oct 10, 2010 9:03 pm

1.9HDi? Bit of an identity crisis :?
Talking bollocks sin©e 2007

2004 D9 2.0 HDi 110 Estate lhd VF38ERHZF81657352 - now with added sump guard
1991 Yamaha TDM850 - Registration beckons!
2004 Toyota Recall4 2.0 VVTI LHD JTEHH20V306108639 - it's a heap
1953 Matchless G3LS - Seriously!
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Re: 406 HDI Diesel fuel cut off solenoid

Postby Meldrew » Sun Oct 10, 2010 10:51 pm

Sorry its a 2.0l HDI, probably cheaper to scrap it if i cannot find out where the fuel solenoid is.

what stops a diesel engine when the key is turned off?
Peugeut 406 Hdi, Toyota mr2, Lomax Trike kit car,Suzuki 1200 Bandit, Avondale caravan. Oh Peugeot cycle as well.
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Re: 406 HDI Diesel fuel cut off solenoid

Postby Doggy » Sun Oct 10, 2010 11:24 pm

Hi Meldrew

HDi's are common rail diesel engines - there is no cut off solenoid. The injectors are electronic, so to stop the engine the ecu just stops triggering them.

When you say no fuel is reaching the injectors, have you undone a pipe? This is potentially dangerous - the injection pressure is up to 1350 Bar, or about 100 times as much as a mechanical injection diesel!

The most common fault of this kind is the in-tank lift pump failing - this supplies fuel at low pressure to the engine driven HP pump via the filter. You should hear the pump run for 4-5 seconds when you turn the ignition on. If it's not working, sometimes bashing the tank will get it going again short term.
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Re: 406 HDI Diesel fuel cut off solenoid

Postby Meldrew » Mon Oct 11, 2010 11:57 pm

Thanks Dogslife, I think you have cracked it, I have taken the fuel pipes off the fuel filter ,
turned on the ignition, no fuel is being pumped out. :frown:
Then I took the rubber cover off from over the tank lift pump, tried again but no noise from the pump. :(
I then pulled the electrical connector off the pump and checked the two thicker grey and yellow wires with a voltmeter, shows 12v for about 10seconds then drops down to 4v, very confusing. :?
The other two finer orange and mauve wires to the unit I beleive are for the fuel gauge, but the mauve one shows a constant 12v with ignition on or off, but gauge works fine.
I am thinking of running a live 12v feed direct from the battery to see if the pump runs, and to eliminate the possibility of a poor feed to the pump. :roll:
Can anyone throw any light on the above or suggest any other procedure?
Peugeut 406 Hdi, Toyota mr2, Lomax Trike kit car,Suzuki 1200 Bandit, Avondale caravan. Oh Peugeot cycle as well.
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Re: 406 HDI Diesel fuel cut off solenoid

Postby Doggy » Tue Oct 12, 2010 1:10 pm

No, that sounds about right. The pump should run briefly, then stop.

No harm using a permanent feed to prove a point, but usually it's the pump. Found one on GSF recently for £65 ish + VAT - that's about as good as it gets, I'm afraid. :roll:
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Re: 406 HDI Diesel fuel cut off solenoid

Postby pfusi1 » Thu Oct 14, 2010 7:14 pm

You're having the exact same trouble as I'm having. I'm almost certain mine's the pump.

I also came across the pump at gsf which is a cracking price. I'm going to swap the pump over and fuel filter over (sorry, not changing the whole housing, just the element).

Think I might change the oil while I'm at it, I always feel much happier with nice clean oil and a new filter. Got some proper peugeot oil filters off ebay, 2 for £4, delivered - best bargain ever!

Then its on to the exciting world of belts and pulleys.
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Re: 406 HDI Diesel fuel cut off solenoid

Postby Meldrew » Thu Oct 14, 2010 7:33 pm

Before I checked wiring to pump I turned ignition on and tapped the pump with a hammer, after 4 sharp taps away it went , and the car started.

I then removed the pump from the tank, struggled a bit undoing the ring as it was very tight, and rang around breakers and got a pump off a 52,000 mile car with a guarantee, and everything is now back to normal.

Thanks for the advice given, its appreciated. :D
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