P38A It's a bit cold🤔

Mark Piercy · Oct 7, 2023

So, last night at 6°, my fip was flashing the engine light on and off briefly while lifting off from the throttle after about 20mins of driving. I remember it doing this at the start of the year at lower temps also.
My question, if the fuel heater on top of the fuel filter fails and only having two wires, would it show up as a fault?
Logically, there's no return feed to an ecu? (live and earth?)

Datatek · Oct 7, 2023

Mark Piercy said:
So, last night at 6°, my fip was flashing the engine light on and off briefly while lifting off from the throttle after about 20mins of driving. I remember it doing this at the start of the year at lower temps also.
My question, if the fuel heater on top of the fuel filter fails and only having two wires, would it show up as a fault?
Logically, there's no return feed to an ecu? (live and earth?)

My project car started doing that when the engine was cold, fixing the leaking FIP seals sorted it. The fault recorded was " fuel flow out of range" There is no feedback from the heater but you can check it's working with Nanocom as it will show the temperature of the fuel rising.

Mark Piercy · Oct 7, 2023

Datatek said:
My project car started doing that when the engine was cold, fixing the leaking FIP seals sorted it. The fault recorded was " fuel flow out of range" There is no feedback from the heater but you can check it's working with Nanocom as it will show the temperature of the fuel rising.

Thanks Keith, all the seals were done a few year ago now and still dry. I've checked this morning with the nanoonanoo and all I have (as always) is that exact fault. Which I've had for the whole time I've owned it.
The modulation is nigh on perfect at 55° at working temp.
My thought was maybe the fuel was too cold causing the actuator stick. Also last night the throttle response at only one point did not react to the pedal. I found that tapping the pedal in quick succession reinstated it's performance??? I can believe it's down to wear as it's now on 250k.
Ill check the resistance for the fuel heater on Elliotts bus and mine and compare, I'll also do as you suggest with the nanocom

Datatek · Oct 7, 2023

Mark Piercy said:
Thanks Keith, all the seals were done a few year ago now and still dry. I've checked this morning with the nanoonanoo and all I have (as always) is that exact fault. Which I've had for the whole time I've owned it.
The modulation is nigh on perfect at 55° at working temp.
My thought was maybe the fuel was too cold causing the actuator stick. Also last night the throttle response at only one point did not react to the pedal. I found that tapping the pedal in quick succession reinstated it's performance??? I can believe it's down to wear as it's now on 250k.
Ill check the resistance for the fuel heater on Elliotts bus and mine and compare, I'll also do as you suggest with the nanocom

Throttle pots do wear out, a regular problem on some Transits, not common on the P38 though. You can also check the throttle pot with Nanocom or a DVM but not so easy to get at.

brianp38dse · Oct 8, 2023

Wammers used to say that was the fuel quantity servo in the pump going out of range and pump rebuild was on the cards

Datatek · Oct 8, 2023

brianp38dse said:
Wammers used to say that was the fuel quantity servo in the pump going out of range and pump rebuild was on the cards

.....

Mark Piercy · Oct 8, 2023

brianp38dse said:
Wammers used to say that was the fuel quantity servo in the pump going out of range and pump rebuild was on the cards

At 250k that is a valid point

Mark Piercy · Oct 8, 2023

Datatek said:
Throttle pots do wear out, a regular problem on some Transits, not common on the P38 though. You can also check the throttle pot with Nanocom or a DVM but not so easy to get at.

I'll do that this afternoon Keith.

Datatek · Oct 8, 2023

Mark Piercy said:
I'll do that this afternoon Keith.

Another unhelpful thought, twice over the time I have owned the RHD car it has failed to respond to the throttle briefly, always at an inconvenient moment like pulling away from traffic lights. It has always recovered by the time I have got the car to the side of the road so I have never go to the bottom of the cause, no faults recorded.

Mark Piercy · Oct 8, 2023

Datatek said:
Another unhelpful thought, twice over the time I have owned the RHD car it has failed to respond to the throttle briefly, always at an inconvenient moment like pulling away from traffic lights. It has always recovered by the time I have got the car to the side of the road so I have never go to the bottom of the cause, no faults recorded.

This is an occurring thing when hot outside and the aircon is on... It would seem like a sticking fuel pump actuator or turbo waste gate??? And.... No faults??

Datatek · Oct 8, 2023

Mark Piercy said:
This is an occurring thing when hot outside and the aircon is on... It would seem like a sticking fuel pump actuator or turbo waste gate??? And.... No faults??

A sticking fuel quantity servo would I think produce a fault. It's not the in tank pump by any chance?

Grrrrrr · Oct 8, 2023

Throttle pot can act up when damp. Have you been wading?

Mark Piercy · Oct 8, 2023

Datatek said:
A sticking fuel quantity servo would I think produce a fault. It's not the in tank pump by any chance?

The in tank pump was replaced about 6yr ago with a vdo unit

it does work well.

Mark Piercy · Oct 8, 2023

Grrrrrr said:
Throttle pot can act up when damp. Have you been wading?

Nope, very little or no water at all kiddo

Grrrrrr · Oct 9, 2023

Mark Piercy said:
Nope, very little or no water at all kiddo

Checked the pollen filter above it recently?

Mark Piercy · Oct 9, 2023

Grrrrrr said:
Checked the pollen filter above it recently?

I built shields for both of them, 0 water ingress there lad

It's the dryest it's ever been in 24yr

well apart from a year last February

Rubberknees · Oct 9, 2023

Mark Piercy said:
I built shields for both of them, 0 water ingress there lad
It's the dryest it's ever been in 24yrwell apart from a year last February
View attachment 299660

Wasn't going to mention it, but now you have

RangeRoller dt · Oct 9, 2023

I’d give it double dose of redex and Italian tune up.

Mark Piercy · Oct 9, 2023

RangeRoller dt said:
I’d give it double dose of redex and Italian tune up.

It spends all the time on the road at around 56mph. We live in the middle of nowhere here dude and we don't do 30

it was hydrocleaned recently for two hours on the machine in the garage and it starts up before you've released the key.
I'm thinking it's all going to come to a head one day when it finally rolls over and gives up due to the high mileage .

RangeRoller dt · Oct 9, 2023

Your modulation is 55 so shouldn’t be anything fatal. Long as you don’t go slapping pistons into valves they’re pretty bulletproof.
Is this similar to what happened with that sensor while back? You used to unplug it to go again

P38A It's a bit cold🤔

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