I fitted Bridgestone 694 235x85x16 Light truck on tubeless 16x7 rims recently to my HZJ75 traytop
The overall height is 818mm or 32inches.

I have done 1000 klms on them. Very quiet and good handling on road.
Good in loose sand at 18psi

Is the engine a 3F?
Maybe the fuel pump is worn out.

I have only one filter on the fuel line in my FJ73

You can also get fuel bockages in the mesh filter inside the injection pump(remove the fuel line).

Another place where they get blocked is in the fuel switch valves if you have 2 fuel tanks

Hi Soenke. I thought it maybe the a loose wire on the fuel cut solenoid.
If they are loose they sometimes vibrate at a certain rpm causing the on/off feel.

Ive been a member of Buschtaxi for 3-4 years I forgot my old login details but I renewed them yesterday
There is too much good diesel tech ...

Hallo hoffen Im unter Verwendung des babelfish also ich, dass es o.k.

ausfällt Ich habe gesehen, dass dieses Problem vorher auf einem 1HZ und ihm ein loser Draht auf dem Kraftstoffschnitt-Solenoid war.
Es vibrierte an bestimmten rpms

Ross West aust

HZJ75 1995
FJ73 with 1HZ 1988