Outer Limits 4x4 Board

My brothers 1998 80 series is running rough at idle, but only once it warms up.

It has a avery slight ticking (like tappets?) sometimes under load...

I think he has around 300k on the clock? maybe a little more.

mine had the same, took it to a fuel injection place and they tinkered with the fuel pump, $40 and it was fixed.,.

I have been thinking injectors or tappets.

I will let him know.

cheers
Rob