850/855 TDI Non Starting

Dan H · Apr 24th, 2014, 21:52

Hi, I have a 1996/7 855/850 TDI that I got from a Mate of mine.

We changed the front end of the car and the seats to v70 so it looked abit newer and seats were heated leather. He then changed the looms from P/S and D/S to the looms from the v70, The v70 was a 2.5T petrol. Now since we changed them the car wouldn't start.
I've put the looms back to the original looms that were already on the car, But it still wont start, We're getting fuel to the injectors when they're cracked off but it will not fire.
It was running fine before the looms got changed.
My mate has apparently done the mod to the Immobiliser relay so that it will bypass it, not sure how he has done this but i read up something that two terminals inside the relay had to be bridged?
He gave the car to a local garage he uses, The mechanics checked everything over and still couldn't get it started.
They got an Auto Electrician to have a look at it and he somehow got it started but had some sort of big box attached to the car somewhere, Now the Auto Electrician is refusing to work on the car because of us changing the looms.

Anyone shed any light onto why they think it might not be starting?

martin_r_smith · Apr 26th, 2014, 09:42

I think by changing the looms around you may have somehow thrown the injection timing so far out that it wont start. Anyway you can check the pump timing?

Dan H · Apr 27th, 2014, 10:51

I'm not too sure, The car is still in the garage, The pump is ran off the gearbox side on these isn't it? The auto Electrician had the car started Using some sort of device plugged into the car, So not sure if its anything mechanical wise.. Could probably give it a go when i get it back, see whats what.

There is also some sort of fuel pre-heater type things just above the gearbox but attached to the engine, Has some wires coming off them, One of them has a snapped off plug/terminal type thing, So not sure if that could be something to do with it either.

martin_r_smith · Apr 27th, 2014, 19:14

Thats the coolant preheater I think you found there, got what looks like 3 glowplugs in it?

Dan H · Apr 27th, 2014, 20:24

yeah 3 little glow plug things... its up for sale as spares or repairs anyway, hopefully somebody will take it off my hands, 3/4 tank of fuel, full v70 leather and front end etc.

Apr 24th, 2014, 21:52	#1
Dan H Member Last Online: Oct 9th, 2023 19:53 Join Date: Mar 2013 Location: Brotton	850/855 TDI Non Starting Hi, I have a 1996/7 855/850 TDI that I got from a Mate of mine. We changed the front end of the car and the seats to v70 so it looked abit newer and seats were heated leather. He then changed the looms from P/S and D/S to the looms from the v70, The v70 was a 2.5T petrol. Now since we changed them the car wouldn't start. I've put the looms back to the original looms that were already on the car, But it still wont start, We're getting fuel to the injectors when they're cracked off but it will not fire. It was running fine before the looms got changed. My mate has apparently done the mod to the Immobiliser relay so that it will bypass it, not sure how he has done this but i read up something that two terminals inside the relay had to be bridged? He gave the car to a local garage he uses, The mechanics checked everything over and still couldn't get it started. They got an Auto Electrician to have a look at it and he somehow got it started but had some sort of big box attached to the car somewhere, Now the Auto Electrician is refusing to work on the car because of us changing the looms. Anyone shed any light onto why they think it might not be starting?

Apr 26th, 2014, 09:42	#2
martin_r_smith Premier Member Last Online: May 10th, 2022 21:01 Join Date: May 2009 Location: Wiltshire	I think by changing the looms around you may have somehow thrown the injection timing so far out that it wont start. Anyway you can check the pump timing? __________________ 1983 244

Apr 27th, 2014, 19:14	#4
martin_r_smith Premier Member Last Online: May 10th, 2022 21:01 Join Date: May 2009 Location: Wiltshire	Thats the coolant preheater I think you found there, got what looks like 3 glowplugs in it? __________________ 1983 244

Apr 27th, 2014, 10:51	#3
Dan H Member Last Online: Oct 9th, 2023 19:53 Join Date: Mar 2013 Location: Brotton	I'm not too sure, The car is still in the garage, The pump is ran off the gearbox side on these isn't it? The auto Electrician had the car started Using some sort of device plugged into the car, So not sure if its anything mechanical wise.. Could probably give it a go when i get it back, see whats what. There is also some sort of fuel pre-heater type things just above the gearbox but attached to the engine, Has some wires coming off them, One of them has a snapped off plug/terminal type thing, So not sure if that could be something to do with it either.

Apr 27th, 2014, 20:24	#5
Dan H Member Last Online: Oct 9th, 2023 19:53 Join Date: Mar 2013 Location: Brotton	yeah 3 little glow plug things... its up for sale as spares or repairs anyway, hopefully somebody will take it off my hands, 3/4 tank of fuel, full v70 leather and front end etc.

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