Engine hunting

1HZ and in great condition apart from that , it is slightly annoying more than anything .

The 1HZ in my coaster did it as well. I was told that it is wear in the pump and not to worry too much about it until the fuel usage became a problem or it became more pronounced at higher revs.

Thanks Pop, there are no leaks so i will check what you suggested Thanks

hmm Im assuming your talking a 1HZ on the flat? ..... even so with a bit of a downhill and a tail wind that would be very much on the upper end of what they could achieve so fair enough question
however lik I posted earlier deffo change the fuel filters.
my 2001 1hz troopy suffered badly from blocked filters and contaminated fuel upon purchase
most noticeaball was the exact symptoms you describe which went away after changing filters and returned as the contaminated fuel blocked filter again.
(ive since flushed tanks etc which fixed issue)
dont forget your troopy has 2 filters with the cartridge style one being most commonly the blocked one being 1st inline
also the filter does not have to be obviosly blocked visually to get the symptoms you describe

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I would have thought that blocked filters would result in loss of power at high speeds and loads. What Wayne described was hunting "if your revs are low" which is also what I experience and have also done so in other cars if you get the revs too low for the gear you are in.

I suspect that a contributing factor is the foot moving slightly on the throttle pedal as the vehicle surges.

Whatever, it is simply overcome by either giving it a bit more on the pedal or shifting to a lower gear.