Landcruiser 100 Series Owners I need help

There is NOTHING wrong with being around 1500 rpm in ANY gear unless it's at full throttle for extented periods, it's not a piddly little motor thats NEEDS a turbo to function.


Peak torque for natural 1HZ is 2000-2200PRM and it isn't much more than what its got at 1500.
Shane

Well in answer to that.

How come that my 1HD-FTE in top gear towing runs at up to 400deg post turbo but in 4th gear runs at least 75 deg cooler Even on a flat road.

Conclusion Engine is lugging and is running harder as its not at optimum revs for speed.

My father had a Valiant and used to stick it in top too early and it used to pink and hop and baulk.
His reasoning was "Its a big six its meant to"

How many electronically controlled auto's allow the engine to run around at as little as 1000rpm when little throttle input reqiured???? ALL OF THEM!! cars and 4by's, we are talking 60-70 Kph aren't we

READ my first response again.
I'm NOT talking about towing, nor was there any mention of a turbo.

Also it's a bit of a stretch comparing the performance virtures of a petrol valiant to a 1HZ, have a think of that .
Shane

Very sorry i spoke

I forgot you cant argue with someone who knows everything

I'll just go and polish my non stainless exhaust.

The point I was making which you obviously either couldnt or wouldnt see was that any motor running in too high a gear below its optimum torque band will do strange things like the original poster said was happening.
Whether it be a Valiant a Mini or a Road train.
Back to exhaust.

Hang on. . . this is going pearshaped.

I'm saying that just because you are at 1500rpm in 4th or 5th, why is weird stuff is going to happen.
If it is flat and the vehicle (1HZ) has no load there is no reason why it can't amble along in whatever gear at 1500 and cause symptoms outlined by the poster of the thread, saying that he is in a gear too high is NOT the problem, even at full throttle in 4th at 1500, will NOT cause issues as described.

I own a 1HZ and have MANY times allowed it to pull down to 1000rpm at full throttle (cresting a sand dune for instance) and i have no issue with doing that again because it's only for a short period.

I've already acknowledge that its below it's peak torque, however the torque band of a 1HD-FTE starts at 1400, so why is there issue with driving in this range?
I'm not picking a fight here, I'm asking why do you (and others) feel that you are doing something wrong by CRUISING around the 1500 range?
Shane

Guys
The higher the gear, the more fuel thats required to keep things moving....hense more exhaust temp in the hdfte....my response was taken out of context...whilst the hdt used to blow up bigends, the 1hz didnt....and 1500 is not too low for the motor to lug...i agree...its just that at that speed, in 5th gear, the motor is reaching its limits with regard to "effortless pulling power" and the pump is oscilating timing or fuel characteristics. I have read somewhere that the governor spring tension is the cause of this..but the bottom line is i dont know...i just hear of it alot, and the shift back to 4th at that speed is the best option.
Andrew

Tyres even Had a Commodore that shuddered thru the steering wheel when starting moving in the morning.
Replaced Rack, high pressure hose, still did it .

Put a new set of front tyres on and it was gone


1500 is pretty low to be in top gear as well

Thanks Pete, your reply is on the mark. Yes, if I accelerate the juddering goes away, similarily if I drop back a gear, usually 5th to 4th, it also goes away. I will be replacing fuel filter next weekend during pre trip service, however I always change it at 10,000km intervals anyway. It may have soemthing in it I guess.
Last week I had the vehicle at Sydney Deisel Injection Service at Smithfield, who tested the pump pressures and assured me they were okay. At that time I had a new set of injectors fitted as the vehicle was on its original set which had done 170,000ks.
I'm pretty sure that there is a small inline filter, mesh type on the intake of the pump. I haven't checked this one myself so I will also do that.
All other sugestions I have received prior to yours I had already carried out. All I seem to have done is started some "Too low a rev or not" war between two fellas.

Anyway cheers and thx for your time. I would be interested in your 100 series experiences, I do a lot of remote travelling, for warned is for armed.

tuckdown@bigpond.net.au

Cheer Al

Hi Al and Terry
I have same model and same shudder. A diesel injection company I went to suggested it was a transmission problem. Terry, was your transfer box ok? I see your are from Queensland. Could I ask which gearbox place did you use?
Regards
Scott