P38A Refuelling issue.

This site contains affiliate links for which LandyZone may be compensated if you make a purchase.
DanClarke

DanClarke

Well-Known Member
Full Member
Posts
16,361
Location
Benfleet, Essex
Hi all,
Sorry to ask but I cannot find a definitive answer in RAVE or my workshop manual in searches here or on the interweb.

Since the fuel hose between the filler-neck and the tank was replaced some little while ago I have had difficulty in passing water fuel into the tank on fill-ups. The pumps (various filling stations) all keep shutting off as if there is a back-flow and the pump thinks my tank is full it isn't; (and this behaviour happens at all levels of the tank and whenever I try to put fuel in).
Refuelling wasn't like this before the hose was replaced, and I cannot find any references to a "vent-hose" that ensures no "blowback" when refuelling. I am stumped.

The replaced hose just went from the bottom of the filler neck assembly to the tank spigot, and there was nothing obvious in that area.

All help gratefully received.
 
I think ratherthan venting the vapour is trapped in something containing activated charcoal and then sucked into the intake and burnt when running. I cannot recall what the thing is called though.
 
There is a flap thing in the moulded filler tube, it's right at the end where the short rubber hose fits.
 
According to my RAVE there's a separate breather hose on diesel & petrol versions. EVAPS version has other pipes as well.

Diesel & petrol sections both contain the same "Service Repair No - 19.55.07"

upload_2022-8-25_14-57-35.png
 
Has it developed over time?
There are enough vents to stop the fuel rushing up the pipe and doing the cut off of the petrol pump.

I have been looking and I know you replaced the bottom pipe.

It has to be a venting issue. You may have to find them and blow them through but some seem to have roll over valves in so maybe gentle with the air;)

Anyway there seems to be an "anti trickle" valve (to stop you getting that extra galleon) I wonder;).

Or you could always stop showing off chucking 200quids worth and just stand there pretending and just trickle in a tenner:D.

J
 

Attachments

  • P38 fuel filler.pdf
    2.4 MB · Views: 207
You must log in or register to reply here.

Similar threads

DanClarke
P38A Part # of petrol filler neck for 4.6 Petrol MY2000
Replies
7
Views
522
Grrrrrr
Grrrrrr
FraserW
Lean after refuelling
Replies
0
Views
567
FraserW
FraserW
M
P38A Leak
Replies
2
Views
712
nigelbb
N
DanClarke
P38A Does the 2000MY Vehicle have an anti-top-off flap?
Replies
8
Views
1K
Datatek
Datatek
2
Early 90 fuel filler neck and hose
Replies
1
Views
583
johnlad
johnlad
Back
Top