theegovernor
Active Member
I can send you the info. And you can borrow my tools if you want
Long crank, no faults
- Thread starter Jimmy Brooks
- Start date
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First class! Nicely done, sir.
Jimmy Brooks
Full Access Member
I’d really appreciate that, let me finalize plans and figure everything out.
jlglr4
Full Access Member
This autologic training video discusses the hpfp system and at around 23:00-24:00 gets into how to check timing.
Looks like you just lock the crank and pull the vacuum pump, which must run off the same aux chain. No need to pull timing covers. You can use the special tool to check the timing, or you can visually inspect to see that the slot in the shaft is aligned with the bolt holes (tool might be easier if you don’t have the engine pulled - not sure how you’ll see it very well otherwise, but maybe you can. I assume this is what your mechanics did, but you might as well double check as you start pulling everything else apart - if it looks like it’s correct, I’d stop there. I’m still just a little baffled at how an out of time pump shaft would give you long crank and no other issues.
Looks like you just lock the crank and pull the vacuum pump, which must run off the same aux chain. No need to pull timing covers. You can use the special tool to check the timing, or you can visually inspect to see that the slot in the shaft is aligned with the bolt holes (tool might be easier if you don’t have the engine pulled - not sure how you’ll see it very well otherwise, but maybe you can. I assume this is what your mechanics did, but you might as well double check as you start pulling everything else apart - if it looks like it’s correct, I’d stop there. I’m still just a little baffled at how an out of time pump shaft would give you long crank and no other issues.
jlglr4
Full Access Member
One other thing - the manual I have (which appears to be some third-party cobbled together sections from 2011 and 2014 manuals, but its not too bad) was found at the below link. See the post that says “here my repository” and then go to the “EN“ folder. You’ll see various manuals. I use the 2014 manual. http://www.disco3.co.uk/forum/discovery-4-wiring-diagrams-146859.html
Jimmy Brooks
Full Access Member
Appreciate all you guys for all of the insight and convincing me to go through with this build. Before pulling the trigger I do want to address one thing, why did it get worse over time so slowly? If it jumped time wouldn’t it have been instantly bad and stayed the same the whole time? That’s the one thing I just don’t understand. I just need that question answered before I rip apart the whole engine because that makes me question if the HPFP itself could just be the issue which slowly got worse over time. Anyone have any idea?
Still haven’t picked up the car yet at the mechanic since I’ve had no time this week. I’ll ask them this when I’m there but just not completely convinced.
Still haven’t picked up the car yet at the mechanic since I’ve had no time this week. I’ll ask them this when I’m there but just not completely convinced.
I'm not convinced either, to be honest, however, if the pump is mistimed, fixing it is probably worth it.
Jimmy Brooks
Full Access Member
Agreed agreed, just wouldn’t want to pull the timing cover and get all the tools to find out the fuel pump is timed but was just going bad.
jlglr4
Full Access Member
I would try a new crank position sensor first. Looks like an easy swap. You said the mechanic swapped out the cam sensors, but not the crank sensor. Cam correlation code could be the crank sensor going bad. If that doesn’t work, I’d try swapping out the HPFPs before I did the timing. Just makes more sense to me. Looks like the pumps can be had for about $200 each, maybe less if you shop around.
What's the cost of checking the pump timing, if you have the tools? Is it just time/effort/messy fluids?
