PUG 405 DIESEL STARTING

[choptop]

hi all ,I'm after some advice,last week ,turn inj on wait for glow plug light to go out (about 6-7 sec)then start ,this week turn inj on,light goes out & turn over for 20 sec,then try again and then try again & it would fire up,changed glow plugs x4 ( no different) changed glow plug relay ( no different) , so now if i wait for glow plug light to go out & try to start it it wont go ,but it will on the 3rd time . any ideas ,its a 405 non turbo on a m redg,1900 cc,its been very good untill this week ,what do you suggest cheers ian.

[Kieran]

Air leak or non return valve leak, allowing fuel to drain back to the tank?

[bortaf]

Are you sure the glow plugs are actually getting a voltage when you turn the IGN on? when it does start is there a lot of white smoke from the exhaust ?
On some cars there is a see through fuel pipe so you can see if there is air in the system, check the pipe from the filter to the pump and see if you have one?
How are the air filter and fuel filter, first port of call on diesel non starts is these 2 filters, the air filter you can just leave out to see if it runs for a few seconds, if the fuel filter is not recent or you don't know it's allways worth changing it.

[ChasR]

IMO it will be one of a fair few things. things:

• Dirty fuel filter - replace it along with the seal (they are cheap even from Peugeot)
• An iffy grenade (priming bulb) with a shot non return valve (people say to fit a Laser one but the given the trouble I had with one on a work's 407 (it leaked covering my hands in diesel (lovely) despite being the correct size (and trying other sizes around it) and it was worse than what was removed in terms of the non return valve) I would either go genuine (pricey) or find a good secondhand one (tricky).
• Warped fuel filter housing - this can also cause iffy starting. Old age and overtightening the filter housing will cause this.
• Cheap Glow plugs - I'd go with Bosch plugs here
• Glow plug circuit fault - Some XU Pugs IIRC seem to have the glow plug light go out before the plugs have actually finished doing their thing. I would be willing to wait 5-10 seconds after the glow plug light has gone off and to see whether it starts easier (this did work on my car, a 306 DT).
  

Try starting it after priming the grenade a few times or it is rock hard. It starts easier I would begin to look at either the grenade being faulty or a fault with the fuel filter housing (warped housing or an iffy seal).

[choptop]

quick update, ive checked all of above,again,car does start but no smoke of any colour ,glow plugs are cheap ones but are used by many others,power getting to and from glow plugs, so i phoned up my mate (diesel fitter) & told him about it ,he came round last sat & he thinks it could be the injector pump seal ( on top of the pump )well yesterday i took the fuel filter housing off to check for cracks & the bleed screw was turning round but not locking in place ,so took screw out & replaced 2 small rubber washers on it ,fitted another new fuel filter ,bled again & ( touch wood )i starts & runs a lot better ,also turn ing on ,light stays on for about 10 sec but you can start it after about 4 or 5 sec,so maybe cured ,fingers crossed ,thanks for the advice all