HELP...stalling issues

[Joamer]

I have a 2001 DHSE, it has a bad habit of stalling when slowing or idling in traffic!!!! So far have spend £1500 on trying to fix the issue with a change of ECU, Fuel Injection Pump, Crank sensor and had electric points checked. Anyone had similar problems or especially Andy ideas to fix problem or my beloved RR will have to be rehomed

 

[wammers]

I suggest you put it on diagnostics and see what is logged. The usual problem with stalling of that nature is a quantity servo fault.

 

[Joamer]

Has been on auto logic diagnostics and no faults logged. Also car started revving up to 2000+ RPM intermittently... Really stumped

 

[Datatek]

Has been on auto logic diagnostics and no faults logged. Also car started revving up to 2000+ RPM intermittently... Really stumped

As the P38 diesel is not OBD compliant, it may be the diagnostics were not capable of reading the faults.

 

[Joamer]

We went to a Land Rover specialist and they had it plugged into their diagnostics��

 

[Datatek]

We went to a Land Rover specialist and they had it plugged into their diagnostics��

It's not the first time someone said that and it turned out that the specialist didn't know what they were talking about.

 

[wammers]

Has been on auto logic diagnostics and no faults logged. Also car started revving up to 2000+ RPM intermittently... Really stumped

If it's stalling and revving on it's own that is a quantity servo problem or a sensor sending wrong info, there MUST be a fault logged. Get some proper diag on it.

 

[TCubed]

I had a stalling issues on my DHSE which turned out to be the fuel filter wasn't properly screwed in causing some air leakage. Probably unlikely to be your issue as you mention the revving to 2000rpm, but might be worth a look

 

[Joamer]

Have had 2 diagnostics sessions on the car with 2 different garages and no faults...Changed Pump yesterday at garage and still stalling....Not sure where to go from here as all garages I go to are stumped...

 

[TCubed]

no faults at all sounds a bit iffy.. there's usually at least one in there, even if it's just a trivial little soft fault...
Whereabouts are you? There might be someone nearby with a Nanocom or other dedicated P38 diagnostics who could help.. Check LZ international rescue

 

[Grit Valve]

If you unplug the cps while the engine is running its will rev to exactly 2000 rpm
Could be a failing cps but that would show on diagnostics .

 

[wammers]

Have had 2 diagnostics sessions on the car with 2 different garages and no faults...Changed Pump yesterday at garage and still stalling....Not sure where to go from here as all garages I go to are stumped...

What is tick over set at and when does it rev to 2000 RPM?

 

[mutsnutz]

injector with wire failing possibly

 

[wammers]

If you unplug the cps while the engine is running its will rev to exactly 2000 rpm
Could be a failing cps but that would show on diagnostics .

Yes or a bad connection to it or one incorrectly fitted. But there definitely should be a fault code logged.

 

[wammers]

injector with wire failing possibly

That would not cause what he has.

 

[mutsnutz]

might cause the stalling

 

[wammers]

might cause the stalling

Number four injector measures start of injection, that measurement is used by the ECU to adjust injection timing by modulating the timing solenoid. Providing static timing of pump is somewhere near the engine will run at lower RPMs without it. But it would cause the MIL lamp to come on. Plus limp mode at higher RPM. An intermittent fault on that would cause the MIL lamp to flash but the engine would not stop. An intermittent fault on the CPS at tick over could stop the engine. But there are also several other things it could be. But regardless of anything else there should be a fault code logged if either of those is a problem. The only thing that can cause the engine to stop, is if the quantity control solenoid shuts fuel off for some reason. So it is either a fault in that, or a faulty sensor that supplies info to the ECU that controls it. The number four injector is not one of those sensors.

 

[mutsnutz]

ok so i got that one wrong im going back to my hiding hole now :behindsofa:raise:

 

[Datatek]

Number four injector measures start of injection, that measurement is used by the ECU to adjust injection timing by modulating the timing solenoid. Providing static timing of pump is somewhere near the engine will run at lower RPMs without it. But it would cause the MIL lamp to come on. Plus limp mode at higher RPM. An intermittent fault on that would cause the MIL lamp to flash but the engine would not stop. An intermittent fault on the CPS at tick over could stop the engine. But there are also several other things it could be. But regardless of anything else there should be a fault code logged if either of those is a problem. The only thing that can cause the engine to stop, is if the quantity control solenoid shuts fuel off for some reason. So it is either a fault in that, or a faulty sensor that supplies info to the ECU that controls it. The number four injector is not one of those sensors.

The stop solenoid can also shut the engine off but is not relevant in this case I think as it also revs out of control.
Judging by another thread, it might be worth pulling the EDC to look for water ingress as an outside chance.

 

[wammers]

The stop solenoid can also shut the engine off but is not relevant in this case I think as it also revs out of control.
Judging by another thread, it might be worth pulling the EDC to look for water ingress as an outside chance.

The stop solenoid is only a back up in case of quantity servo total failure to prevent a run away. The engine is actually shut down primarily by the fuel quantity servo being pulled to the zero fuel position by it's return spring. But any fault on either should be logged. Yes worth a look but i would also think if that is the case a fault should be logged. Maybe a case of unsuitable diag being used.