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 Fuel starvation / blockage - changing the tank pickup filter

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GPW
Hiace Master
Hiace Master
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Number of posts : 837
Home City : Cambridge, UK
Model and year : Model: KD-KZH100G-MRPGT
Year: 1996
Colour: 4K1
Trim: FN42

Registration date : 2016-07-16

PostSubject: Fuel starvation / blockage - changing the tank pickup filter   Tue Sep 04, 2018 2:10 pm

Hi All,

Looks like I still have a fuel starvation issue on my van, I fixed two leaks (one on the pump and one on the primer pump) but when driving over about 70kmh a vacuum is building up in the feed pipe between the fuel in the tank and the primer pump - enough to actually pull the pump handle down and eventually stop the engine.

So - has anyone had this before?
Has anyone replaced their tank pickup filter?
Has anyone got at the tank level sender - is it a hatch inside the van or does the tank itself need to be dropped?

Thanks in advance!
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katana
New Member
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Number of posts : 10
Home City : Doncaster, UK
Model and year : '98 KCH40 Hiace Regius (owned for 12 Mths)
'88 LH61 Hiace (Owned for 18yrs now sold)
Registration date : 2018-04-02

PostSubject: Re: Fuel starvation / blockage - changing the tank pickup filter   Sat Sep 08, 2018 9:06 am

I had this on my LH61, right after I changed to veg oil diesel. Filter in tank was so blocked that it eventually stopped. I dropped tank, cleaned filter, flushed tank with degreaser, blew out fuel lines & replace main filter. I never used veg oil again. Pretty straight forward job
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GPW
Hiace Master
Hiace Master
avatar

Number of posts : 837
Home City : Cambridge, UK
Model and year : Model: KD-KZH100G-MRPGT
Year: 1996
Colour: 4K1
Trim: FN42

Registration date : 2016-07-16

PostSubject: Re: Fuel starvation / blockage - changing the tank pickup filter   Sat Sep 08, 2018 10:37 am

Thanks Katana, much appreciated, I'll do exactly the same to mine, at least the tank looks straightforward to get to!
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GPW
Hiace Master
Hiace Master
avatar

Number of posts : 837
Home City : Cambridge, UK
Model and year : Model: KD-KZH100G-MRPGT
Year: 1996
Colour: 4K1
Trim: FN42

Registration date : 2016-07-16

PostSubject: Re: Fuel starvation / blockage - changing the tank pickup filter   Sat Sep 29, 2018 7:47 pm

An update today, finally got some spare time with the van in the garage and removed the tank, not such a difficult thing once drained, although one does smell of diesel for the next few days.

There's actually a drain plug in the tank too. eBay sells some fantastic clear 25L stackable containers for 12 so I siphoned what I could through a filter into the car and drained the rest via the plug.

So after getting the tank out, dusting it with the hoover and marvelling at Toyota's precision seam welding I opened up the pickup/return to see this:



Incidentally the tank sender is in a different hole in the middle and can be accessed (and unplugged and replaced) from inside the van: there's a little door that you prize up at the back to get to that.

So it's clear now what was stopping my van, can't blame Toyota either: a serious contaminent is in there and will require some inventive tank washing to get it out. lso I need a new pickup filter if that one doesn't clean up well.

So if you find you have a vacuum between your engine and tank (detected by the primer pump handle being sucked down when your van loses power) you may care to look at the tank.

No idea if it's old diesel bug or rust from a rusty pump, the tank itself looks fine, just full of filthy stuff.
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