Fuel blockage HJ61

Submitted: Sunday, Apr 13, 2014 at 12:53
ThreadID: 107239 Views:2075 Replies:7 FollowUps:10
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I am having an intermitent fuel blockage problem on my HJ61 TD. It starts and runs fine, then seems to run out of diesel. Let it sit for a minute and it runs fine again for a while and then the same problem. any suggestions?
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Reply By: Life Member TourBoy, Bundaberg - Sunday, Apr 13, 2014 at 13:03

Sunday, Apr 13, 2014 at 13:03
Hi,
Down on the injector pump where the fuel line enters the pump there is the primary filter. You will have to undo the fuel line and look for the gauze mesh in behind it inside the injector pump. It will be blocked or partially so. No one ever checks them.
Cheers,
Dave
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Follow Up By: iggybr - Sunday, Apr 13, 2014 at 16:44

Sunday, Apr 13, 2014 at 16:44
As soon as it stops raining, I'll check that!
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Reply By: get outmore - Sunday, Apr 13, 2014 at 13:11

Sunday, Apr 13, 2014 at 13:11
sounds more like its got air in the system
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Reply By: kiwicol - Sunday, Apr 13, 2014 at 13:45

Sunday, Apr 13, 2014 at 13:45
Check to see if you have an oil murphy switch, these are the symptoms of this switch.
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Reply By: Bob Y. - Qld - Sunday, Apr 13, 2014 at 16:04

Sunday, Apr 13, 2014 at 16:04
iggy,

Is this problem while driving, or only while idiling, after initial start-up?

The 12HT motor has an EDIC system, which stops the engine if there is no oil pressure, or oil pressure doesn't rise above 20kpa, after starting.

If the oil pressure doesn't come up quick enough, then the EDIC system will shut it down before any appreciable damage is done.

How many kms has the vehicle done? Maybe it's only a simple fix like Tim suggested?

Bob
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Follow Up By: Bob Y. - Qld - Sunday, Apr 13, 2014 at 16:06

Sunday, Apr 13, 2014 at 16:06
"Tim"??? Meant Dave. Maybe I'd better go and have a Bex :-)



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Follow Up By: iggybr - Sunday, Apr 13, 2014 at 16:46

Sunday, Apr 13, 2014 at 16:46
Plenty of oil pressure. Had a total rebuild about 30k ago. It happens about 5 or more minutes into a drive. Is there a filter on the tank? Changed my fuel filter and the old one and diesel looked good! Seems like something is blocking the pickup but I don't know. Might have to drop the tank.
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Follow Up By: get outmore - Sunday, Apr 13, 2014 at 17:26

Sunday, Apr 13, 2014 at 17:26
you sure 12ht have an edic motor - i dont think they do

also the edic system on the 2H isnt to prevent damage due to low oil pressure - thats just a side benifit. Its function is to prevent the engine running backwards which could be disasterous to the driver
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Follow Up By: Bob Y. - Qld - Monday, Apr 14, 2014 at 09:44

Monday, Apr 14, 2014 at 09:44
Don't know for sure, GOM. Just going on quick read of workshop manual.

All explained below.

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Follow Up By: get outmore - Monday, Apr 14, 2014 at 10:21

Monday, Apr 14, 2014 at 10:21
from what he says I really doubt its a fuel blockage issue

when you bleed it is thare any issue getting fuel to squirt out the nipple?

if not that eliminates that

Id be looking at a faulty shut down valve or air getting into the system.
when it stops do you bleed it?

if you have a fuel blockage problem it should drive like an absalute pig and blow white smoke everywhere
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Follow Up By: iggybr - Monday, Apr 14, 2014 at 11:00

Monday, Apr 14, 2014 at 11:00
It does drive like a pig, just like its running out of fuel. No white smoke tho
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Follow Up By: greybeard - Monday, Apr 14, 2014 at 11:07

Monday, Apr 14, 2014 at 11:07
Wouldn't white smoke be down to over fuelling? ie unburnt fuel rather than a fuel blockage?
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Follow Up By: get outmore - Monday, Apr 14, 2014 at 18:54

Monday, Apr 14, 2014 at 18:54
dunno all I can tell you is they blow crap loads of white smoke when the fuel filter is blocked and they start chugging
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Reply By: Member - Trouper (NSW) - Sunday, Apr 13, 2014 at 19:03

Sunday, Apr 13, 2014 at 19:03
The air intake to tour tank maybe blocked. When it happens again open your fuel tank and listen for a hissing sound as air rushes back into the tank. It may only be a small hiss so try restarting your engine. The same situation as yours happened to a mate of mine last weekend. He's a diesel mechanic as he said, I checked for blocked filters etc etc which was all OK thought about all the complicated things then checked himself and thought of KISS, then he opened the tank and in rushed the air!!!! no more problems.
As he always says think of the simple things first dont jump to complicated conclusions

See Ya
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Follow Up By: get outmore - Sunday, Apr 13, 2014 at 19:14

Sunday, Apr 13, 2014 at 19:14
ive filled up plenty of diesels

all of them hiss and suck back when the fuel caps removed
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Reply By: Vx 12ht - Sunday, Apr 13, 2014 at 20:23

Sunday, Apr 13, 2014 at 20:23
It could be your vsv valve the 12ht uses vacuum to shutdown and open a butterfly to start it does not run and edic type system at all.



Ps my car did this and I just made sure all the vacuum lines were not blocked and cleaned the vsv valve.

Good luck mark
AnswerID: 530495

Reply By: Batt's - Monday, Apr 14, 2014 at 07:07

Monday, Apr 14, 2014 at 07:07
Could be air getting in threw the hand pump or I know the 2H has a sediment trap not sure about the 12HT near the fuel tank mounted inside the chassis. It's important that you bleed it every now and then if not it will totally block up which happened to me on the beach one day so I bypassed it with spare hose I carried till I bought a new one. When I replaced it I broke the old one open and it was totally filled with sediment.
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