Engine surging 100 series turbo diesel

Check the Boost on the Turbo.

Regards
japmel

I've a similar prob on mine - no turbo etc :^( but it does it around 15 - 1600 revs in 4th and 5th. Usually occurs on a steady throttle, and backing off or putting the wellie in fixes it. A mate in the diesel business was interested as a pump shop had mentioned it, so I should chase it up with him, when I get the time. He's checked the pump and timing and all OK there. If I get to talk to him soon, I'll post any answers then,

Andrew

I have exactly the same prob and setup,even with cruise control on

Put it down to bouncing on the springs in the clutch plate, as slight acceleration or de-acceleration will cure it.
as this will constantly load the springs in one direction.

if anyone finds otherwise let us know

Harrow

Does it happen on both tanks. I has a similar problem 18 months ago was caused by a dirty fuel filter. Had a pre filters fitted close to the tanks. When surging started, I flicked the switch to the other tank and it stopped - back again and surging started. Changed the filters and no problem since.

Put a new fuel filter on it.
The old one may be OK but a new one will fix it.
My old 80 did it before the turbo. I pulled the filter off and checked it and it was clean as a whistle. It drove me nuts all the way from Sydney to the snowy mountains. I rang my father in law who owned it since new and he said it does its done it for years, put a new fuel filter on and it will fix it. I told him I checked it but I put a new one on and bingo, no more surging.
Hope this helps
120scruiser

Our 100 series did something like that,specially noticable going down hill with steady throttle.Toyota had the pump done for us(under warranty),it was the primary fuel pressure(from memory) set too low.Came back running sweet but still blowing too much soot and starting when hot took about 4 cranks before firing up.Took it back and they recconed it was normal,didnt have time to argue as was leaving tassie that week.Got Toyota in Alice Springs to have a look and they said deffinatley not right,pump has to come out and have something done to some fuel solonoid,couldnt wait in Alice for two weeks for pump to be done so waited till we got to Kununurra .They still have it at moment and it better be right this time(fingers crossed).

Also try checking your whell balance and seeing if any are out of round. I had a similar problem once , I swore it was the engine but it was the tyres. Swap front to rear might be a quick check to see of the symptoms disappear before $$ on pump etc.

JamieMac