4.2 TD max 2600 rpm?

[Jan Danielsen]

Hi.
I just buy a HDJ80 with a 1hd-ft engine. Very nice car. It have 557k on the clock. There is one big issue... It will not go over 2600 rpm. I have been testing the wastegat it moves fine and the car pull very fine from the bottom and open to 2600 rpm with a little smoke. With the clutch down it will go to max 2800 rpm.
What can be the problem? Can it be fuel filter or the fuel pump?
Can somebody help?

 

[jpsfj60]

Post in the diesel section

 

[Lumpskie]

Fueling will dictate power and probably the max RPM.

First off, when was the last time your injectors or diesel pump serviced? Having those two in good working condition is key for fuel delivery, which will dictate what power you have, and what RPMs your rig will run at.


Beyond that, I would check 2 things.

1. Is your rig auto or manual. If auto, is transmission kick down adjusted properly?
2. Are you running stock boost or higher? (stock is roughly 10psi) If you're running higher, is your boost compensator adjusted properly?

 

[panamacruiser]

Do it in order, change fuel separator filter (not sure if that is how is called) then check the injectors, no nozzles to replace, the would be the bottom half to be changed, if you don't want to change them, take them out (o-ring MUST be replaced after) and clean them properly, a fine wire brush should do the trick, I believe is a DIY kind of thing, also, start downloading the proper FSM for that engine, it is very good, as is the last mechanical pumps...I know people that help the fuel pump with an aftermarket electricval fuel pump...your rig has a lot of miles on it...