850 tdi wont fire help please

[steven 850tdi]

hi there all im new to this forum but im at my witts end with my 1996 850tdi i cant get power to the glow plugs ive checkd fuses relays they all seem fine the car is lazy when turning the engine over i bought a new battery it turned it over 5times then it went flat ive got diesel to the injectors and put new glow plugs in it i just cant get power to the glow plugs help is needed thanks all

[NI_Volvo_Nut]

The glow plugs on these cars won't come on unless the temp is below 5 degrees, I'd suggest trying a tow (if its manual)

I assume you've checked for timing belts ect, all usual stuff?

Its possible you could have an air leak and the diesel is running back too the tank

Give us a list of what all you've checked so far and symptoms up too now (if any)

[steven 850tdi]

Originally Posted by NI_Volvo_Nut

The glow plugs on these cars won't come on unless the temp is below 5 degrees, I'd suggest trying a tow (if its manual)

I assume you've checked for timing belts ect, all usual stuff?

Its possible you could have an air leak and the diesel is running back too the tank

Give us a list of what all you've checked so far and symptoms up too now (if any)

hi mate thanks for that info i didnt know that ive done all belts new diesel pump got diesel to the injectors but still no joy the pig tale heating plug light on the dash doesnt work is this because of the temp?? can you explain the lazy turning over of the engine thanks mate

[NI_Volvo_Nut]

Lazy turning I would guess is the starter / battery (which you say you replaced) / bad earth, bad earth can be checked by using a jump lead from the engine too the battery, has the car ran since replacing the belts? These engines are critical about the pump timing, I'm in a similar situation myself, I replaced the engine in my S70 TDi and it hasn't ran since, before fitting the engine I replaced the timing belts, so I'm hoping when I check the pump timing I will find it not right. I also have diesel too the injectors, got the engine too fire on easy start and I have towed it 4 miles, I've even put an injector on a pipe outside the engine and am getting fuel through at least 3 injectors, there is no other god given reason why mine won't start either.

Yep, the glow plug light will not come on unless its below 5 degrees

[steven 850tdi]

Originally Posted by NI_Volvo_Nut

Lazy turning I would guess is the starter / battery (which you say you replaced) / bad earth, bad earth can be checked by using a jump lead from the engine too the battery, has the car ran since replacing the belts? These engines are critical about the pump timing, I'm in a similar situation myself, I replaced the engine in my S70 TDi and it hasn't ran since, before fitting the engine I replaced the timing belts, so I'm hoping when I check the pump timing I will find it not right. I also have diesel too the injectors, got the engine too fire on easy start and I have towed it 4 miles, I've even put an injector on a pipe outside the engine and am getting fuel through at least 3 injectors, there is no other god given reason why mine won't start either.

Yep, the glow plug light will not come on unless its below 5 degrees

yes mate also changed the alternator and starter to ive got fuel to 3.4.5 injectors not 1or2thow so i hope thats why mine wont fire do you know the fireing order of these engines mate a cant really tow it no tax mot etc etc

[NI_Volvo_Nut]

Have a look at the threads I've put up and the routes I've been down, I got the tools again tomorrow too check my timing, and I'll report back

http://www.volvoforums.org.uk/showth...t=NI_Volvo_nut

http://www.volvoforums.org.uk/showth...t=NI_Volvo_nut

http://www.volvoforums.org.uk/showthread.php?t=96657

[CherryB]

Hi there, could it be the no. 4 injector with the run sensor on? Had a similar experience with a vw t4 van, injector 4 sensor had packed up telling the ecu that it failed to fire. Worth testing (don't know how to , mind), but they are jolly pricey... 250 for my v70 p2 tdi, plus the dredded..
Just a thought..

[NI_Volvo_Nut]

I had tried another pick-up injector, but didn't connect it, I was told by a VW expert that the Injector wouldn't need to be connected for it to start, but its my next step if I find that the pump timing is right

[steven 850tdi]

Thanks peolpe got it running pump timimg was out dial gauge did the trick

[NI_Volvo_Nut]

Me too, got mine taxed and back on the road today