P38A BeCM to engine ECU sync problem

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

SteelCityRover

Member
Posts
12
Location
Sheffield
Hi guys, well its been roughly a month since I had a flat battery caused by my RF transmitter which knocked my BeCM and Petrol ECU out of sync, but since unplugginging the blue wire things have improved massively. No flat battery and starting everytime until this morning.

I returned home from a day out yesterday with everything normal and fuel in the tank. Came out to the car this morning for the school run, unlocked the car with the fob (no flat battery) got the kids in and jumped in myself. I then turned the car over for a few seconds and thought I felt it fire up so I released the key but I didn't hear it fire up because the kids started shouting.
When they stopped and I realised it had not started I thought nothing of it and tried again but I was only greeted by the familiar sound of the engine cranking over but not firing up. I then tried locking and unlocking the car and trying again but to no use. It was displaying all the trade marks of loosing sync but without the battery going flat.

Has anyone else's P38 ever lost sync between the BeCM and engine ECU without the battery going flat?

All advice and comments appreciated James.
 
Last edited:
Yes but not since I changed to the new RF receiver: green dot, two circuits boards at right-angles to each other. Both Datatek and Mozz have posted picture etc up on here.
 
I've had occasions on other cars where I've released the key a bit early, and then not been able to start it - it's old-fashioned flooding. You could have the same problem.
 
Just to update, I borrowed a syncmate again tonight which gave me the all clear saying it was sync'd but its still doing the same, so not a syncing problem.

Just charging my torch up then going out to inspect parts. Anyone have any suggestions where to start? Also I think I can smell petrol after cranking so I think fuel is getting to the engine but will check spark plugs for signs of flooding.
 
Sounds a good place to start.

Have you not got a Nanocom or similar you can stick on it? I don't know if an ODB2 reader might read the petrol engine and see if there are any fault codes?
 
To be honest I know I should have invested in a Nanocom or something like that when we bought the rangie but at present I cannot justify to my wife the cost of purchasing such equipment on a vehicle thats turning out to be so unreliable. I mean we fix one problem and we fall in love with it again and then something else fails and we're devastated, not ideal when we have 3 young children and its our only car.

Anyone had similar problems with a fail crank position sensor?
 
SteelCityRover said:
To be honest I know I should have invested in a Nanocom or something like that when we bought the rangie but at present I cannot justify to my wife the cost of purchasing such equipment on a vehicle thats turning out to be so unreliable. I mean we fix one problem and we fall in love with it again and then something else fails and we're devastated, not ideal when we have 3 young children and its our only car.

Anyone had similar problems with a fail crank position sensor?
Click to expand...

A Range Rover isn't a conveyance, it is a hobby....

I am one of the biggest Range Rover fans, but even as much as I love them I have to admit they are flawed.

Thinking of just having the two Range Rovers is just asking for trouble, so we have by Girlfriends Fiat 500 in the garage as back up....well at the moment it is in use as the L322 is misbehaving but that is by the by....

With young kids, relying on a Range Rover as your only vehicle is pushing luck ..... I wish you all the best and yes, a faulty CPS would prevent starting!
 
Sorry to confuse, I haven't got a code. Just grasping at straws really from what I've read on other forums.

I will get back under the bonnet tomorrow and let you know if I win the battle.
 
sounds like its flooded to me, have you carried out a check to see if its got a spark? forget all your fancy code reading malarky and do the basic checks first, i once watched a roadside breakdown patrol spend three hours on a car that had cut out, only to realise it had run out of petrol!!
 
Saint.V8 said:
A Range Rover isn't a conveyance, it is a hobby....

I am one of the biggest Range Rover fans, but even as much as I love them I have to admit they are flawed.

Thinking of just having the two Range Rovers is just asking for trouble, so we have by Girlfriends Fiat 500 in the garage as back up....well at the moment it is in use as the L322 is misbehaving but that is by the by....

With young kids, relying on a Range Rover as your only vehicle is pushing luck ..... I wish you all the best and yes, a faulty CPS would prevent starting!
Click to expand...
So speaks a man with two dodgy Range Rovers who has to resort to a Fiat 500 for reliable transport:rolleyes:
 
Datatek said:
So speaks a man with two dodgy Range Rovers who has to resort to a Fiat 500 for reliable transport:rolleyes:
Click to expand...

Not much wrong with the p38 just oil pressure is a bit low, hydraulic tappet s a bit tappy, air bags need replacing, door locks dont work, its a bit rough round the edges and could do with a new brake accumulator but not to bad.

I have the new oil pump gears so they will be fitted soon!

But yes, they are unreliable and as for the Fiat, despite the usual reputation, that is running strong!
 
Right guys here's the latest with the P38.

Re-fitted charged battery, unlocked with the fob to make sure alarm system was disarmed properly, re-sync'd with the syncmate so BeCM was definitely talking with the petrol ecu.
Tried firing it up but same again, just cranking over. Took 2 spark plugs out to check for flooding but they were bone dry. Checked for spark on plug number 1, no spark present.

I have ordered a new crankshaft position sensor to arrive tomorrow so hopefully when I fit that it will solve my problems. Fingers crossed
 
Saint.V8 said:
Not much wrong with the p38 just oil pressure is a bit low, hydraulic tappet s a bit tappy, air bags need replacing, door locks dont work, its a bit rough round the edges and could do with a new brake accumulator but not to bad.
:hysterically_laughi:hysterically_laughi
I have the new oil pump gears so they will be fitted soon!

But yes, they are unreliable and as for the Fiat, despite the usual reputation, that is running strong!
Click to expand...
and you call that "not bad":eek:
 
You must log in or register to reply here.

Similar threads

Joss155
P38A 2.5 dse becm syncmate
Replies
17
Views
2K
Joss155
Joss155
I
P38 BeCM locked?
Replies
8
Views
629
pwood999
pwood999
Radar1946
P38A 12.5 volts and not enough to start engine.
2
Replies
23
Views
1K
Radar1946
Radar1946
P38 guy
P38A Aftermarket remote
Replies
1
Views
354
pwood999
pwood999
DollyBird
Engine disabled, keys not working, tried the guide “Re-synching the Range Rover P38 diesel engine with the Solved - BECM using a Nanocom” no luck
Replies
9
Views
947
DollyBird
DollyBird
Back
Top