P38 Diesel Starts revs up to 3000rpm then stalls

rfsimoes · May 6, 2013

Hi all,

After a fuel injection pump swap, my p38 started up a bit rough but good enough to drive. Lack of power was noticeable at a climb.
This morning, it starts right off but revs up to 3000 rpm then stalls. Is this a symptom of something known?

Best regards.

Datatek · May 6, 2013

rfsimoes said:
Hi all,

After a fuel injection pump swap, my p38 started up a bit rough but good enough to drive. Lack of power was noticeable at a climb.
This morning, it starts right off but revs up to 3000 rpm then stalls. Is this a symptom of something known?

Best regards.

Probably the FIP is not back on correctly.

rfsimoes · May 6, 2013

Datatek said:
Probably the FIP is not back on correctly.

Can I rotate clockwise the FIP (retard it) and see what happens?

Datatek · May 6, 2013

rfsimoes said:
Can I rotate clockwise the FIP (retard it) and see what happens?

NO, timing is in fractions of a millimetre, also if the top has been off the FIP that needs to be back in exactly the right position.

rfsimoes · May 6, 2013

No FIP has been taken apart.
This fip was working last time it ran.

I, as always, followed installation procedure as per rave.

Datatek · May 6, 2013

rfsimoes said:
No FIP has been taken apart.
This fip was working last time it ran.

I, as always, followed installation procedure as per rave.

So, it's a replacement FIP? If so was it off a Range Rover?

rfsimoes · May 6, 2013

This is my old FIP that was running on my old engine. Bought used engine with FIP.

Datatek · May 6, 2013

rfsimoes said:
This is my old FIP that was running on my old engine. Bought used engine with FIP.

You have the dial gauge and other special tools required to re-time the FIP?

rfsimoes · May 6, 2013

Yes, I bought them when I overhauled the bought used engine.

Datatek · May 6, 2013

rfsimoes said:
Yes, I bought them when I overhauled the bought used engine.

Then if the timing is correct and the FIP is from a P38, it's time for diagnostics I'm afraid.

rfsimoes · May 6, 2013

Datatek said:
Then if the timing is correct and the FIP is from a P38, it's time for diagnostics I'm afraid.

yes but the :mil6::mil5::mil59::mil26: from Cyprus BBS won't work until the day after tomorrow so I can buy a nanocom.

sovereign · May 6, 2013

Could it be a fault in the crankshaft sensor.
The one that reads the pins in the flywheel.
Mine got disconnected, and that's sort of what it did.

rfsimoes · May 6, 2013

update,

Got back home in "my" borrowed Vespa, and here is what I found out.
:drum:

Start engine with full throttle and revs "only" go to 3000 rpm, hold the pedal down, let it heat up, and slowly holding back on the throttle.
After heating up for a while, I was able to get back the throttle all together.

This is the idle that it ends up doing.

P38 rough idling - YouTube

After a short drive, I noticed low engine power. Revs won't pass 3000rpm and when going uphill I need to shift down do continue. It even misfires a bit at this point.

Well, at least I can leap to work tomorow.

P38 Diesel Starts revs up to 3000rpm then stalls

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