Re: Diesel Specialists?

"" wrote: > Hi, > > > Got a starting problem on my `95 306 Dturbo. To clear things > up first, > > i have replaced glow plugs with genuine ones (tested them > too, all ok) > > , performed cylinder head leakage test (All Ok) . It has a > brand new > > Bosch battery on also. > OK. > > > out lots of white smoke (unburnt diesel?) if i leave the > light to go > > out and leave a further 10seconds it will fire straight up > with no > > smoke or misfire. When the engine is warm it will chug and > fire up > > anywhere from 3 cranks to maybe 10 cranks, and chucks out > clean white > > smoke but no misfire. Sometimes it can fire up perfect. If > the car is > [...] > Strange, it has all the signs of duff glow plugs. > Have you checked you have power on all of them ? > Another point is, if you checked the resistance of them, I'm > affraid that > low-cost multimeters are inaccurate with low values. > > The behavior you describe (i.e waiting a little after the > light goes off and > starts fine) is pretty common. > > These cars (like any car for 20 years or so) have a PPR-box > (Pré-Post > chauffe Rapide - fast Pre-Post Glowing), this means that the > glow plugs' > control box supplies them for about 10s (yellow light on), and > for some time > after the light goes off (some seconds). You can hear the > relay click when > you turn the key on, and click another time a little while > after the light > is off (usually 5-10s). The second click is the relay > deactivation - this is > only here the plugs are off. > > It may also be caused by some air into the fuel circuit, but > usually causes > a "constant" starting problem. My brother's '91 205 has > developped such a > fault when it is parked for a while (some weeks). > > Regards, > G.T > 205 Diesel & turbo-Diesel :

Thanks, i had a suspision of the glow plugs . I have tested all the glow plugs before fitted, sent a live to them, watching the tips glow, tested ohms etc (used works trustworthy multimeter)... also cleaned up the contact areas on the rail to the plugs! Should i take a gamble on taking my diesel pump off? They didnt seem to sure.

you should test if there is any AND sufficient power going to the plugs, they use more than just a few Amps ( take them out and see if they glow when preheating)

you could check the fuel lines for air,

is your timing belt stil in the right place? check for wear, broken teeth, etc.

not likely to be the fuel pump i'd say, maybe be the timing can be off.

it might be that the injectors have gone dodgy, there's another thing to check for.

best luck

Marc

Hi,

I'm in doubt here, usually it doesn't forgive such things...

Also in doubt here. IMO, a problem with injectors may well involve some other problems, like bad performance / MPG, which would be "constant".

Regards, G.T

i refered to the timing of the pump, sorry i was not clear about that. problems with timing belts are very unforgiving indeed...

not al together true. if the injectors have clogged up somewhat it does get a starting problem, even when warm, once it runs all seem to be fine.

when i redid the injectors of my 305 that was exactly the symptom. it started bad, ran bad for 200/300 meters and then took of in smoke until it was warm and ran just fine.

i replaced the preheater bougies ( which were far gone... ) and that gave a bit of relief.

the atomisation footprint from the overhauled injector was way way better than the ones that came out of my car, putting them in it started right away again an ran fine even without preheating. it had a ton more torque to...

although mine went at 375.000 km, injectors dont live forever even in a PSA engine...

I'd say the OP has to stay well away from Pug garagists and go to a good diesel specialist to have those things sorted out, checking injectors is a relative simple procedure

cheers

Marc

Hi,

You mean the pump advance, the stuff which is set by the position of the pump on the engine ? Yeah could be that, but prettty unlikely to move.

We both agree about this point, the Diesel engine is pretty sensitive to the injectors' setup (injection footprint & pressure). Perhaps I could try this, as I tend to think my car has a little leak of power.

My opinion too, the OP should try to stick to a Diesel specialist, or a Lucas or Bosch station.

HTH, G.T