Harrop 2300 supercharger to Optimiser 6500

[PeeBee]

Seem to only find Windows to work on the when it's hot, but anyway I reversed the fan direction on the roof radiators, will see how that works. Started into the first iteration of repacking since the big trip. Options and more changes, mounted the freezer in its most usable spot then compromised the storage tub setup, on it goes. Off to the Vic high country next week so just about packed and ready, two doors have decided they don't want to open so trim has to come off to work thru the mechanisms. Happy days I guess.

[PeeBee]

Note to myself to keep on top of the fuel filter service intervals. On the way home from the weekend the fuel pressure dropped to 5psi from 10psi whilst cruising, then dropped to zero. The car would only boost to 3-4psi, and run smoothly up to 1400rpm, then start to shudder and starve. I drove about 50klm under these conditions then pulled over and put the car on a rope behind my brother for the return trip home. If its not the filter its the new Carter Black lift pump, 5000klm old. Just not ready to get under the truck and get covered in fuel just yet so the problem awaits my attention.
Car ran beautifully up until then, cooling system brilliant, just more bee stings

[Touses]

Hi Phil,
Just a thought.
Does the lift pump have a filter of it's own?
Ie , mounted before or after the pump but before the main filter(s)?
Had a similar prob on a vehicle, removed said filter and all well.

[PeeBee]

Hi Phil,
Just a thought.
Does the lift pump have a filter of it's own?
Ie , mounted before or after the pump but before the main filter(s)?
Had a similar prob on a vehicle, removed said filter and all well.

I run a filter pre the pump to protect it. Its a large/medium size donaldson, sourced from @mudski. I think its clogged, yet to get under the car to replace it - not keen on the diesel after shave odor bath, but it has to happen. I also used to run a small ryco style pre the transfer pump when I had two tanks, but found the amount of material collected was minimal to zero, so went with the larger unit - just think I pushed the interval too long and its had a lot of fuel thru it and sits for weeks on end without moving either. I will post some pics of the debris once its out. I also need to check out the lift pump, have a spare but fingers crossed its not that.

[mudski]

Phil if the filter used is P581682, thats a 9mic filter. A wee bit too fine to be first cab off the rank to see fuel from the tank. This is probably why its clogged. But you got that back in 2022 so if probably done a few k's anyway.

I'd start with a 20-30mic filter then have the finer filters closer to the engine. This way all filters are doing a job, not just the first filter catching most and the secondary(s) doing not a lot.

[PeeBee]

Phil if the filter used is P581682, thats a 9mic filter. A wee bit too fine to be first cab off the rank to see fuel from the tank. This is probably why its clogged. But you got that back in 2022 so if probably done a few k's anyway.

I'd start with a 20-30mic filter then have the finer filters closer to the engine. This way all filters are doing a job, not just the first filter catching most and the secondary(s) doing not a lot.

Thanks Mark, I am only running the single filter. This is in alignment with what is normally set up on the patrol from factory, and I think they are 10um filters? I dont disagree with the rationale though, however now adding a second unit from under the car is going to be a challenge - I bought the second unit from you so I guess I will look at that - what is the indicator of the filtration size on the filter - is it simply a 30um or 9um marking? Regards miles, the unit was bought whilst the cab exchange was in progress so its not done more than 5K in kilometers despite the time.

[PeeBee]

Another day spent on the concrete paying homage to the Chev Monster. Root cause of the fuel blockage turned out to be a failed fuel computer flowmeter. These are stainless steel bodied, precision devices, and I noticed one had rattled loose from its mounting bolts. I found after replacing both the filter, which had minimal crap in in, little bit of water, and then the Cater Black Lift Pump, I still didn't have fuel to the engine. Process of staged disconnections led to the fault being the flowmeter, so bypassed it and away the flow started. I then decided to take both the supply and return line unitits out of play until I find something to replace them. Next the voltage to the Injector Pump solenoid decided to dip to 9V - WTF now. So, after a long day and patience at its limit I jumpered around the issue and drove the truck into the garage after letting it idle then a few squirts to 3K on the tacho, only to find after unloading a heap of gear out of, the Codan Antenna was hitting the garage door, so load the crap back into it and get it inside, closed door, good night, at least I know what it wasnt.

[PeeBee]

Further rooting around yesterday, now back to square one it seems. I did some cable reconfiguration when installing the new Victron 50amp DCDC units - in parallel to give me the 100amp charge rate for the 400ahr bank, and inadvertently left 3 cables off the positive bank connection post This dropped power off the Codan HF, the uhf's and stopped the roof mounted fans and lift pump. I also found two 20amp fuses blown, so going to employ my fuse ammeter tester in the near future to test the individual fuse capacities against the circuit loads.
Currently waiting for 2 x banks of fuses to arrive so I can protect the circuits off the positive posts. They are fused however more at source use than supply - simply was the way I ran it earlier, now want it at the battery. Going to a larger frame midi frame that Victron use.

[PeeBee]

@mudski, what a spectacular supplier of brilliant customer service. I was speaking with Mark at 8.30am this morning, to sort out a filter order. I paid for the items via card then the filters were on my doorstep at 10am - cant beat that, and very keen pricing to boot. Thanks Mark, I recommend his services to all here.

[mudski]

Thanks Phil. But it was purely timing on this occasion that my driver was going straight past your way that same morning. If you'd rang half hour later it would have missed the morning run.