SaabManc

Request for help and advice please.

Above failed to start for 5 second turn over on first use of the day then started immediately as normal on second attempt.
One brief stop and restarted immediately first time.
Drove fine then parked for a few hours (nose down slightly) then would turn over but not start. Runs (badly of course) on Easy Start but stops when spray stops.

So fuel supply problem I assume. Unless the pump is inactive due to error code?

P0607 & P1380 codes - related?

As it's fuel related can a blocked fuel filter fool system to give a P0607? (I believe there is a low pressure pump in the injector pump unit that sucks fuel through the fuel filter, if it's struggling to draw fuel up could this trigger a P0607?). Or is there another code for a blocked fuel filter?

Can the P0607 throw up a P1380 error if no communication between ECU and glow plug control module? Or vice versa? Or both?

Can a glow plug control module fault fool system to give a P0607?

However,
WIS says for P0607
"Diesel Pump Temperature Sensor. Internal Fault

Carry out SPS programming"


WIS says for P1380
"Glow Control Unit Feedback Error

Fault in glow plug circuit or in diagnostic lead between pin 9 of the glow plug control module and pin K35 of the engine control module."

Surely these can't have come up separately at the same time can they?

I can check the ECU lead and connection if I can get the connector off, will need to take the inlet manifold off first though. Pump has been covered in oil over time could this have seeped in and caued the fault(s)?


Fuses, relays and glow plugs ok, any procedure to test the glow plug control module itself?

If it's the ECU and not the connections (or glow plug control module) anyone know a SPS programmer around the Greater Manchester area?

If that fails is the last chance saloon solution the transistor replacement as seen on youtube, has anyone tried this? (click for English subtitles if someone else wants to try it):-

Bomba de Gasoil no funciona, SOLUCIONADO !!. el paso a paso de como solucionarlo

I've since learnt that there are diagnostic leads to and from ECU to GPCM and that on some injection pumps (not sure about this one) if there is a faulty temperature sensor in the ECU it can default to a -5C reading. This would then presumably activate the glow plug circuit which if faulty but previously undetected could then also throw up a code with a non start?

Hope that makes sense or am I way off?
Trying to get my head around how the components affect each other.

If this applies to the VP44 PSG16 then if there is a glow plug circuit fault could this prevent start up? How to check though? Is it possible to check the control module itself in any way?

Any thoughts please? Thanks for all input.