Datatek
Well-Known Member
- Posts
- 45,758
- Location
- Near Poitiers SW France
Hot start problems affect all M51 engines. Other things can also cause starting problems, low cranking speed, fuse box problems etc.
P38 Newby
- Thread starter langley
- Start date
This site contains affiliate links for which LandyZone may be compensated if you make a purchase.
Hot start problems affect all M51 engines. Other things can also cause starting problems, low cranking speed, fuse box problems etc.
polsta
Active Member
- Posts
- 843
- Location
- Portsmouth, south coast
More often the blend motors causing the book to show, on later cars aircon mal function does not seem to produce the book, at least it does not on mine.
mines a 96, sometimes, not always has the book ? how much are you looking at for blend motors inc labour would you say ?
what do the blend motors do exactly ?
StuckAgainSteve
Well-Known Member
- Posts
- 2,276
- Location
- London
My 99 car's AC needs recharging and the book symbol is there. HEVAC codes were cleared when the blend motors were changed last year so I'm guessing the low-pressure is triggering the fault code.
Datatek
Well-Known Member
- Posts
- 45,758
- Location
- Near Poitiers SW France
Two blend motors for temperature control, one for passenger, one for driver, third blend motor is for distribution
Big job to change them if done by the book at a dealer. Lots of short cuts for DIY.
langley
New Member
- Posts
- 372
- Location
- Bristol UK
Ok the saga is ongoing...
THe range rover has now decided it doesnt like starting when cold..... or in general...
Tried to start it today after not using it for 2 days, and it wound over for a looooong time and then started with a puff of smoke. Ran fine though, and was as ever as smooth as anything.
Drove to local shops and on restart, engine being warmer, it started in half to third the time.. Filled the tank half, and it started in a similar time again.
Sooo, now left wondering.
Is it glow plugs, leak off pipes, air in the system or the fuel lift pump... Or does it just not like me...
THe range rover has now decided it doesnt like starting when cold..... or in general...
Tried to start it today after not using it for 2 days, and it wound over for a looooong time and then started with a puff of smoke. Ran fine though, and was as ever as smooth as anything.
Drove to local shops and on restart, engine being warmer, it started in half to third the time.. Filled the tank half, and it started in a similar time again.
Sooo, now left wondering.
Is it glow plugs, leak off pipes, air in the system or the fuel lift pump... Or does it just not like me...
- Posts
- 16,482
I'd check the Glow Plugs for Juice first, check the Leak Off pipes for signs of splitting, check the clear pipe from the Fuel Filter for Air Bubbles....
If it is down a bit on performance (who can tell on the M51!!) it could be the Tank Lift Pump, check for good flow to the fuel filter....
Also might be time to check the live data and ensure the pump timing is correct, also a static timing of the pump wouldn't go a miss....
langley
New Member
- Posts
- 372
- Location
- Bristol UK
Thansk for that,
Im going to change the leak off's today and glow plugs tommorrow.
Hoping its not the fuel lift pump.
An i assume if there is air in the clear pipe? i can bleed it, i keep reading about this 17mm nut?
Im going to change the leak off's today and glow plugs tommorrow.
Hoping its not the fuel lift pump.
An i assume if there is air in the clear pipe? i can bleed it, i keep reading about this 17mm nut?
rodntod
Active Member
- Posts
- 607
- Location
- ayrshire scotland
Yep, 17mm nut on the FIP ,slacken a little with the fuel pump running and this will let the air leave the system.
langley
New Member
- Posts
- 372
- Location
- Bristol UK
Right,
Last night i changed the glow plugs and the fuel injector leak off hoses.
Car started loads quicker, so a small bonus.
Now left with a bit of winding over when its warm.
It would appear that there is a HOT START FIX fitted, so just need to now know if this is working.
Can anyone tell me, assuming you ave one fitted, when the vehicle is warm and the hot start box is therefore working, does the glow plug light on the dash engage and light up?
Otherwise, how do you know if it is actually working.
Last night i changed the glow plugs and the fuel injector leak off hoses.
Car started loads quicker, so a small bonus.
Now left with a bit of winding over when its warm.
It would appear that there is a HOT START FIX fitted, so just need to now know if this is working.
Can anyone tell me, assuming you ave one fitted, when the vehicle is warm and the hot start box is therefore working, does the glow plug light on the dash engage and light up?
Otherwise, how do you know if it is actually working.
- Posts
- 16,482
Yes....
langley
New Member
- Posts
- 372
- Location
- Bristol UK
Thanks for the concise answer.
Assuming therefore that the box is not working, anyidea how to fix a hot start fix
Assuming therefore that the box is not working, anyidea how to fix a hot start fix
- Posts
- 16,482
Cheap enough to replace - the Fix isn't complex so if it doesn't work - pointless in trying to repair - £30 and you can get another one from the 'Bay.....
Remember the 'Fix' isn't a fix - it just masks the problem - the true fix is to retime the FIP to take out the timing change due to drive chain stretch.
Remember the 'Fix' isn't a fix - it just masks the problem - the true fix is to retime the FIP to take out the timing change due to drive chain stretch.
langley
New Member
- Posts
- 372
- Location
- Bristol UK
Thanks, will just throw a new one at it...
