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  #91  
Old 4th-August-2006, 15:34
BCA BCA is offline
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Join Date: Aug 2006
Posts: 3
Default Re: Diesel Hot Starting Fault P38

Apologies to Tigapiglet for getting your name wrong - my brain crashed.
My computer also crashed while doing the first reply, so I did another, only to find the first one HAD got through after all !
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  #92  
Old 5th-August-2006, 15:37
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Join Date: Mar 2005
Location: somerset
Posts: 547
Default Re: Diesel Hot Starting Fault P38

hi boys not on much latley i will have a look into diagram as i hear a few people say i have cocked up oops! and see if there is a better way of wiring up hope your all well tiga
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  #93  
Old 16th-August-2006, 18:48
Senior Member
 
Join Date: Aug 2005
Posts: 282
Talking Re: Diesel Hot Starting Fault P38

To every one that has posted recently on this Mod.

Tigapiglets mod works fine if you use a timer relay- this energises the cold start process before cranking and ensures for quicker starting and a perfect tickover speed.

This problem is not a range rover specific problem, 325TD BMW's, Vauxhall Omega 2.5D's and anything fitted with this engine management system also suffers the same problem - save your money gents don't spend out on expensive pump repairs that will not cure the problem - follow Tigapiglets brilliant Mod use a timed relay and you will be smiling as I am
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  #94  
Old 18th-August-2006, 10:55
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Join Date: Mar 2005
Location: SOUTH YORKS
Posts: 190
Default Re: Diesel Hot Starting Fault P38

Hello to all you hot start problem people out there.


This mod sounds great and it looks like it works fine.
However are we not just adding a mod to buy pass what is wrong.
I believe that 50 percent of the hot start faults are down to the engine coolant temp sensor being u/s.
the sensor is mounted below no 4 injector (not on the injector, but just below it).
you do not even have to replace the sensor, all you have to do is unplug it to see if the fault goes away.
if it does then a new sensor is about 12 quid and easy enough to fit with a long socket and bar.

good look to all you out there that have this problem.
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  #95  
Old 21st-August-2006, 18:59
Junior Member
 
Join Date: Aug 2006
Posts: 21
Default Re: Diesel Hot Starting Fault P38

Quote:
Originally Posted by wantaquad
To every one that has posted recently on this Mod.

Tigapiglets mod works fine if you use a timer relay- this energises the cold start process before cranking and ensures for quicker starting and a perfect tickover speed.

This problem is not a range rover specific problem, 325TD BMW's, Vauxhall Omega 2.5D's and anything fitted with this engine management system also suffers the same problem - save your money gents don't spend out on expensive pump repairs that will not cure the problem - follow Tigapiglets brilliant Mod use a timed relay and you will be smiling as I am
Hi everyone - first post on here! I can confirm I have a Vauxhall Omega 2.5TD fitted with the same BMW engine. This has done 124K miles and has just started doing this out of the blue. It does always fire ('touch-wood') but can take 30sec - 1min after being stood for 10 - 15mins when fully warm. Fires first time from cold.

Question is, is the fix procedure the same on the Omega i.e. is the wiring going to be the same?? Would really appreciate advice on this.

Quote:
Originally Posted by brookediamond
Hello to all you hot start problem people out there.


This mod sounds great and it looks like it works fine.
However are we not just adding a mod to buy pass what is wrong.
I believe that 50 percent of the hot start faults are down to the engine coolant temp sensor being u/s.
the sensor is mounted below no 4 injector (not on the injector, but just below it).
you do not even have to replace the sensor, all you have to do is unplug it to see if the fault goes away.
if it does then a new sensor is about 12 quid and easy enough to fit with a long socket and bar.

good look to all you out there that have this problem.
This is also interesting - are you saying to disconnect the Temp Sender and see how it runs. If it starts fine when hot this is proving a replacement sensor would cure the problem?

Slightly off topic - do your BMW 2.5TD's make a ticking noise at idle - I have had this since I got the car approx. 7k miles ago. The noise disappears when revs are raised to approx. 1500 - 2000rpm. See attached link where I have tried to capture the noise by using the movie function on my digital camera. Ignore the footage itself as I needed to be in the drivers seat to rev the engine (no one to assist I'm afraid) and so ended up pointing the camera down towards the ground to get the best sound. You may need to turn up your volume to get the best sound effect from this clip, but the noise captured is a fairly good representation - maybe listen to it a few times to get best feel for the noise.

Only lasts 20 odd seconds - hope this works!

http://s73.photobucket.com/albums/i2...t=MOV01256.flv

I have recently been told it could be the injectors? Advice gladly received!
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  #96  
Old 21st-August-2006, 20:44
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Join Date: Mar 2005
Location: SOUTH YORKS
Posts: 190
Default Re: Diesel Hot Starting Fault P38

I THINK THE BASICS ARE THE SAME FOR ALL THE CARS THAT HAVE THIS ENGINE.
UNPLUG SENSOR AND SEE IF FAULT GOES AWAY
iT IS A BIT FIDDLY TO GET AT BECAUSE IT HAS A RETAYNING CLIP ON SENSOR PLUG BUT IF YOU USE A LONG ENOUGH SCREW DRIVER YOU CAN GET AT IT FROM TOP OF ENGINE AFTER YOU HAVE REMOVED BLACK PLASTIC COVERS.

I WILL BUY YOU A PINT IF THIS DOES NOT CURE YOUR FAULT( IM THAT CONFIDENT).
GOOD LUCK AND LET ME KNOW WHAT HAPPENS.
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  #97  
Old 21st-August-2006, 22:35
Junior Member
 
Join Date: Aug 2006
Posts: 21
Default Re: Diesel Hot Starting Fault P38

Quote:
Originally Posted by brookediamond
I THINK THE BASICS ARE THE SAME FOR ALL THE CARS THAT HAVE THIS ENGINE.
UNPLUG SENSOR AND SEE IF FAULT GOES AWAY
iT IS A BIT FIDDLY TO GET AT BECAUSE IT HAS A RETAYNING CLIP ON SENSOR PLUG BUT IF YOU USE A LONG ENOUGH SCREW DRIVER YOU CAN GET AT IT FROM TOP OF ENGINE AFTER YOU HAVE REMOVED BLACK PLASTIC COVERS.

I WILL BUY YOU A PINT IF THIS DOES NOT CURE YOUR FAULT( IM THAT CONFIDENT).
GOOD LUCK AND LET ME KNOW WHAT HAPPENS.
OK - will try this! I'll hold you to that drink if it doesn't work ! What I don't understand is how can this switch be faulty when the temp gauge still reads fine? (presumably this sensor provides info to the gauge on water temp?). Can you explain further..... Vauxhall TIS manual on this engine reckons that the inlet manifold needs to be removed to replace the coolant temp sensor - I'm sure it can be done without (albeit fiddly).

One final question (sorry for there being so many). On your previous post you quote:

"I believe that 50 percent of the hot start faults are down to the engine coolant temp sensor being u/s."

Sorry for being thick but what do you mean by the 'coolant temp sensor being u/s'? In other words what does u/s stand for?
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  #98  
Old 22nd-August-2006, 11:28
Senior Member
 
Join Date: Mar 2005
Location: SOUTH YORKS
Posts: 190
Default Re: Diesel Hot Starting Fault P38

Hello no your not thick.

U/S is a term engineers use for unsafe.( ie knackered).
I managed to remove the sensor by using a long scket ( not sure of size, pos 21mm, but do check). I attached a long socket bar and removed by sliding it in under the manifold from the side.
It is fidly but i did not remove anything other than the plastic manifold covers.
The temp sensor in my car was also giving a reading but if that reading is incorrect or sliightly out then the car will mix different quantities of air and diesel thus causing the problem.

good luck.
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  #99  
Old 23rd-August-2006, 15:40
Senior Member
 
Join Date: Aug 2005
Posts: 282
Default Re: timer relay

sorry for not replying sooner - particularly to wood pecker -

The relay I used is ; Brodersen Unic XM Control relay - I believe it to be available on line from RS components.

Also with reference to an earlier post - disconecting the temperature sensor results in the ECU using a default temperature value, Basically it states that the engine is cold (same as the relay mod) but will stay at a cold setting regardless of engine temp.

I am led to believe that the same sensor is used to control the Temp Gauge so if your gauge shows normal when the engine is warm it probably won't be U/S.
If any of you have changed the sensor and cured the fault please post so that we can all follow.
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  #100  
Old 23rd-August-2006, 19:18
Junior Member
 
Join Date: Aug 2006
Posts: 21
Default Re: Diesel Hot Starting Fault P38

Quote:
Originally Posted by brookediamond
Hello no your not thick.

U/S is a term engineers use for unsafe.( ie knackered).
I managed to remove the sensor by using a long scket ( not sure of size, pos 21mm, but do check). I attached a long socket bar and removed by sliding it in under the manifold from the side.
It is fidly but i did not remove anything other than the plastic manifold covers.
The temp sensor in my car was also giving a reading but if that reading is incorrect or sliightly out then the car will mix different quantities of air and diesel thus causing the problem.

good luck.
Thanks for the clarification. I have ordered one and will try this - seems worth a go - I'll let you know how I go. I think I am going to be having my injectors overhauled in a few weeks so that is probably an ideal time to have this installed as the inlet manifold has to be removed anyway - making it less fiddly.

Is your engine quiet at idle - I have started another thread entittled "BWM Diesel 2.5 TD: Ticking Noise (inc. Footage of actual Noise)" about this. I have an annoying ticking / tapping noise at idle on mine.
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