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85OR won't start - help/suggestions/reccomendations

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Old Sep 30th, 2018, 20:36   #1
skattrd
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Default 85OR won't start - help/suggestions/reccomendations

Hi all,
I have a 1996 850R that won't start, it cranks and cranks, but doesn't start.
I've taken it to my local old school garage and tried several things, but we're stumped.
The LED codes flashed out suggesting TPS, which was the first thing we changed. We then changed the cam sensor, crank sensor and coil. None of this made any difference.
It appears that there is no spark.
We've checked various circuits and everything seems to be getting power.
The garage OBD diagnostic also brings up a TPS error, so i changed that again, this time for a genuine Bosch, still no joy.

I've searched the forums and checked various things including wiring near the rad and starter, all seem fine.

The car is near Lincoln, does anyone have any suggestions or maybe somewhere not a million miles away i could get the car taken to that could investigate the issue.

Thx
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Old Sep 30th, 2018, 21:28   #2
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Quote:
Originally Posted by skattrd View Post
Hi all,
I have a 1996 850R that won't start, it cranks and cranks, but doesn't start.
I've taken it to my local old school garage and tried several things, but we're stumped.
The LED codes flashed out suggesting TPS, which was the first thing we changed. We then changed the cam sensor, crank sensor and coil. None of this made any difference.
It appears that there is no spark.
We've checked various circuits and everything seems to be getting power.
The garage OBD diagnostic also brings up a TPS error, so i changed that again, this time for a genuine Bosch, still no joy.

I've searched the forums and checked various things including wiring near the rad and starter, all seem fine.

The car is near Lincoln, does anyone have any suggestions or maybe somewhere not a million miles away i could get the car taken to that could investigate the issue.

Thx
sounds like an immobiliser fault
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Old Sep 30th, 2018, 22:38   #3
Luxobarge
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sounds like an immobiliser fault
Seconded. Start by cleaning the contacts on the antenna ring that goes around the ignition barrel, although the usual symptom here is that it fires and runs for a couple of seconds and then stops - does yours fire at all?
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Old Sep 30th, 2018, 22:47   #4
skattrd
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Cheers guys.

The car doesn't fire at all, no spark.
I'll have a play with the alarm/immobiliser fuses/relays etc next

I should have mentioned the error code read was p0120.
There is also a flashing light on the gear button and the "up arrow" on the dash is flashing.

It's an auto estate, if that makes any difference - could it be gearbox issue?

I did try moving the selector up and down repeatedly, which made no difference.
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Old Oct 2nd, 2018, 00:35   #5
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Originally Posted by skattrd View Post
Cheers guys.

The car doesn't fire at all, no spark.
I'll have a play with the alarm/immobiliser fuses/relays etc next

I should have mentioned the error code read was p0120.
There is also a flashing light on the gear button and the "up arrow" on the dash is flashing.

It's an auto estate, if that makes any difference - could it be gearbox issue?

I did try moving the selector up and down repeatedly, which made no difference.
This may (or does) sound dumb, but on an older car you could literally just send a live feed to the ignition coil and crank it for a spark, is this not possible with newer ignition systems?
My train of thought is immobiliser bypass perhaps?

Last edited by Donkey; Oct 2nd, 2018 at 00:37.
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Old Oct 9th, 2018, 23:23   #6
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Originally Posted by skattrd View Post
Hi all,
I have a 1996 850R that won't start, it cranks and cranks, but doesn't start.
I've taken it to my local old school garage and tried several things, but we're stumped.
The LED codes flashed out suggesting TPS, which was the first thing we changed. We then changed the cam sensor, crank sensor and coil. None of this made any difference.
It appears that there is no spark.
We've checked various circuits and everything seems to be getting power.
The garage OBD diagnostic also brings up a TPS error, so i changed that again, this time for a genuine Bosch, still no joy.

I've searched the forums and checked various things including wiring near the rad and starter, all seem fine.

The car is near Lincoln, does anyone have any suggestions or maybe somewhere not a million miles away i could get the car taken to that could investigate the issue.

Thx
has the car ever run since you got it? if not the previous owner may have instaled a hidden switch
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Old Oct 14th, 2018, 22:10   #7
skattrd
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I've played around with alarm/immobiliser fuses and still no joy.

It ran fine and I was using it regularly. I left it for a couple of weeks. the battery died and it wouldn't start, that was now several months ago.

Are there any suggestions for a specialist/independent or the like not far from Lincs? It's currently about 10 miles south of Lincoln.
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Old Oct 16th, 2018, 15:09   #8
oblark
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I no of a t5r gul that has the same fault, you name it and it's been replaced with either new or working parts and it still won't start.

Have you checked the wiring loom that goes to the grey relay on the slam panel ?

A fault with these cars is water getting in the loom and for it to corrode the copper wires. The gul in question needs a new engine loom as the one the car is seriously corroded.
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Old Oct 16th, 2018, 15:42   #9
Clan
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Quote:
Originally Posted by skattrd View Post
Hi all,
I have a 1996 850R that won't start, it cranks and cranks, but doesn't start.
I've taken it to my local old school garage and tried several things, but we're stumped.
The LED codes flashed out suggesting TPS, which was the first thing we changed. We then changed the cam sensor, crank sensor and coil. None of this made any difference.
It appears that there is no spark.
We've checked various circuits and everything seems to be getting power.
The garage OBD diagnostic also brings up a TPS error, so i changed that again, this time for a genuine Bosch, still no joy.

I've searched the forums and checked various things including wiring near the rad and starter, all seem fine.

The car is near Lincoln, does anyone have any suggestions or maybe somewhere not a million miles away i could get the car taken to that could investigate the issue.

Thx
Have you checked the ignition coil power stage ?

I had a fault like this back in the 1990's tried everything , no spark , Flywheel sensor signal looked fine on the oscilloscope when cranking .
After a long while it turned out to be the main battery cable which runs down past the throttle was causing interference, Just re routed the main battery cable a couple of inches and it started .
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Old Oct 16th, 2018, 22:27   #10
skattrd
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Quote:
Originally Posted by oblark View Post
Have you checked the wiring loom that goes to the grey relay on the slam panel ?
Yep, it looked fine.

Quote:
Originally Posted by Clan View Post
Have you checked the ignition coil power stage ?
I'm not sure I know what you mean, can you please clarify.

I'll check the routing of the battery cable next time I'm at the garage.

Thanks for the input folks, keep the suggestions coming.
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