Orangebean
Active Member
- Posts
- 137
- Location
- South Hams, Devon
2002 p38 non starting
- Thread starter Wayne burgess
- Start date
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steviebhoy81
Member
- Posts
- 49
- Location
- wishaw,scotland
Im not a mechanic sir.however the rangey started after 5 or 6 repeats of this and the aa guy was cancelled.
1997 2.5 dse.
- Posts
- 58,170
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- Preston Lancs.
I am and it achieves nothing.
steviebhoy81
Member
- Posts
- 49
- Location
- wishaw,scotland
You learn something new everyday springs to mind bro.it certainly worked on mine.1997 2.5 dse.
Certainly something there,maybe on another forum??
- Posts
- 58,170
- Location
- Preston Lancs.
The start fuel is set by the ECU from signals received from the ECU temp sensor. Pressing the throttle pedal has no influence on that setting.
tomcat59alan
Well-Known Member
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- wirral and triquivijate
Personally I would put it down to a lucky coincidence.
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- 12,634
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- Sud ouest France !
steviebhoy81
Member
- Posts
- 49
- Location
- wishaw,scotland
Could it be that the ignition is turned on and off 5 or 6 times makes the fuel pump move the fuel??Unless you have a faulty pedal potentiometer???maybe?
Will see if i can find the post.
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- 12,634
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- Sud ouest France !
Good point but then it means the pump is having to compensate for something else not working...
- Posts
- 58,170
- Location
- Preston Lancs.
In the interests of understanding note the following. On the 1994 to 1998 MY P38 diesel the lift pump is active either when the glow lamps are on or when the engine is running. On MY 1999 and on P38 diesels, the lift pump is active when glow lamps are on, with the engine running or when cranking. For all models from a cold start, when ignition is switched on cold start fuel is set and the glow lamps are activated bringing on the lift pump for differing amounts of time by the engine ECU subject to temp readings from the ECU temp sensor. When the glow lamps go out the lift pump stops until the engine is cranked or running 1999 on. Or the engine is running 1994 to 1998. So in a cold start scenario on all models, cycling the ignition and therefore glow lamps and lift pump may help starting if one or more glow plugs are duff. You need at least three good plugs on three consecutively firing cylinders to even get a lumpy start. In an hot start situation when ignition is turned on, idle fuel is set and the glow plugs and lift pump are not activated. So no matter how many times you cycle the ignition there will be no change. Pumping the throttle achieves nothing in either scenario.
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