P38A [RESOLVED!] P38 DSE non start - fuel issue

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wammers said:
Not if it does not show glow lamp when engine is cold and ignition is switched on it isn't. Glow relay is switched by ECU subject to signals from ECU temp sensor. Green one between cylinders three and four. First disconnect hot start as described earlier and see what you get. If no change look at ECU temp sensor or glow relay itself.
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OK interesting. I'll try that this evening. Disconnecting hot start will be more difficult than you'd think due to way it's wired in!
 
P38_OTMS said:
OK interesting. I'll try that this evening. Disconnecting hot start will be more difficult than you'd think due to way it's wired in!
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Usually hot fix just picks up a switched live and ground and is connected to each end of the cut sensor signal wire. Just disconnect signal wire from hotfix and join back up. Should be a grey wire with a blue tracer.
 
One red herring I forgot to mention was that when I discovered the hot fix box I also discovered that the earth wire had come away from the scotch lock. This was most likely during my manhandling of the ECU as it looked like a fresh break. I have reconnected that wire now and still the light doesn't come on. I'll remove hot fix later and see what happens.
 
P38_OTMS said:
One red herring I forgot to mention was that when I discovered the hot fix box I also discovered that the earth wire had come away from the scotch lock. This was most likely during my manhandling of the ECU as it looked like a fresh break. I have reconnected that wire now and still the light doesn't come on. I'll remove hot fix later and see what happens.
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When the temp signal from the ECU temp sensor is below a certain value the ECU activates the glow relay for a varying time subject to temp sensor reading and switches on the glow lamp. It is the ECU that switches the glow lamp on NOT the glow relay. I am thinking the hot fix is faulty. If all is same when it is disconnected then you maybe looking towards the temp sensor first of all. Slowly slowly catchy monkey.
 
P38_OTMS said:
Haha not quite - but progress is being made...

kapilamuni - Whilst I appreciate the help I have noticed quite early on that you have a somewhat gung ho approach. I've got an extensive motorsport background both behind the wheel and on the spanners and whilst I don't know too much about diesel engines I do know enough to know that following your advice could potentially put me (or others) into an early grave. So thanks, but no thanks!
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I'm sorry to hear that. My intention was to help you to get the car running. My advise was based on my experience. I did that with my car and ran it for more than 3 weeks in heavy traffic.It was not based on what I heard or read somewhere kind of thing. Infact, my car had a similar problem , it was frequently cutting out on the road. I learned a lot from that issue , thanks to members here specially to N2O.
I'm no motorsport guy or a techie . My knowledge on cars , if any, started from Haynes Manuals.
The injection pump used in our cars is very similar to VP37 found on VW, AUDI, BMWs etc. There are many forums on these cars with a lot of info.

Good luck!
 
kapilamuni said:
I'm sorry to hear that. My intention was to help you to get the car running. My advise was based on my experience. I did that with my car and ran it for more than 3 weeks in heavy traffic.It was not based on what I heard or read somewhere kind of thing. Infact, my car had a similar problem , it was frequently cutting out on the road. I learned a lot from that issue , thanks to members here specially to N2O.
I'm no motorsport guy or a techie . My knowledge on cars , if any, started from Haynes Manuals.
The injection pump used in our cars is very similar to VP37 found on VW, AUDI, BMWs etc. There are many forums on these cars with a lot of info.

Good luck!
Click to expand...
You do seem to be missing the point. The advice you are free with is foolhardy and possibly dangerous. Haynes Manuals were published to help DIY owners, I am willing to bet that no manual would give the inept advice that you have given. That would leave them open to litigation. Thank God that the OP saw the stupidity of your advice. Mainly for the fact that he lives on our island not yours so we don't have to worry about an out of control vehicle on out roads.
 
Last edited:
kapilamuni said:
I'm sorry to hear that. My intention was to help you to get the car running. My advise was based on my experience. I did that with my car and ran it for more than 3 weeks in heavy traffic.It was not based on what I heard or read somewhere kind of thing. Infact, my car had a similar problem , it was frequently cutting out on the road. I learned a lot from that issue , thanks to members here specially to N2O.
I'm no motorsport guy or a techie . My knowledge on cars , if any, started from Haynes Manuals.
The injection pump used in our cars is very similar to VP37 found on VW, AUDI, BMWs etc. There are many forums on these cars with a lot of info.

Good luck!
Click to expand...

That really does explain quite a lot.
 
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