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Hzj75 possible fuel starvation?

Esben Bøll

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Mar 4, 2020
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denmark
I have a hzj75 1994 with the 1hz non turbo.
I just got it and did a longer drive today.
When going down the highway between 70 og maybe 90.. keeping the same speed. Sometimes it felt like it was pulling just a little less than normal.
Like I suddenly had a stronger headwind (the was absolutely no wind today) or the brakes was dragging a little (I checked and the wheels are spinning freely)
Not enough to see a speed change on the speedometer......., just a slight feeling.
And yes I was holding the throttle in the same position.
I should maybe mention is was something like minus 5 celsius.

Any ideas?
 

Bungarra

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Nov 4, 2012
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australia
I suspect its your fuel filters brother.... always pays to give new arrivals a birthday ( filters, oil) just for peace of mind... I hope its that simple.... cheers.
 

Esben Bøll

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Mar 4, 2020
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I have installed a brand new original filter + added a flash live prefilter.
Tank had been completely off and cleaned, and I have replaced the little in tank fuel filter.
 

Esben Bøll

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Could it be possible that when the engine is pumping out the fuel of the diesel tank that it is creating a vacuum? I there is a valve thing for that.?
 

David

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Dec 28, 2012
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Take the filler cap off if you can hear air escaping the vent is blocked in the cap, my 78 1HZ does it now and then
 

Esben Bøll

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Mar 4, 2020
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Update.
I first installed a clear line just after the prefilter and directly to the fuel line to the pump.
No bobbles there.

Then I installed the clear line after the original filter/primer and there is clearly bobbles.

Also when pumping the primer it does never become completely hard.

What do you think. New filterbracket/primer?
 
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