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rfsimoes

Member

• May 6, 2013

• #1

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

Well-Known Member

• May 6, 2013

• #2

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.

Click to expand...

Probably the FIP is not back on correctly.

 

R

rfsimoes

Member

• May 6, 2013

• #3

Datatek said:

Probably the FIP is not back on correctly.

Click to expand...

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

 

Datatek

Well-Known Member

• May 6, 2013

• #4

rfsimoes said:

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

Click to expand...

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.

 

R

rfsimoes

Member

• May 6, 2013

• #5

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

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

 

Datatek

Well-Known Member

• May 6, 2013

• #6

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.

Click to expand...

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

 

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rfsimoes

Member

• May 6, 2013

• #7

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

 

Datatek

Well-Known Member

• May 6, 2013

• #8

rfsimoes said:

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

Click to expand...

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

 

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rfsimoes

Member

• May 6, 2013

• #9

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

 

Datatek

Well-Known Member

• May 6, 2013

• #10

rfsimoes said:

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

Click to expand...

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

 

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rfsimoes

Member

• May 6, 2013

• #11

Datatek said:

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

Click to expand...

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

 

S

sovereign

Active Member

• May 6, 2013

• #12

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.

 

R

rfsimoes

Member

• May 6, 2013

• #13

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.