4JJ1 problem

[yowiie]

I need some desperate help.
I have an issue with my 4JJ1
The vehicle was driving fine until I came to a decent hill, so accelerated to maintain the speed, was almost at the top and the engine died and engine light came on. I pulled over to to see if i could find and visible isses but found none. The car was still idling ok, so i proceeded the next 150klms. The car never went into limp mode, but i Could not go any faster than 100klms/hr om the down hill or straights. On any hill climbs I could get any more that 70KLms/hrs
The vehicle has been at the mechanics for 2 days and I arent any further ahead, the scan tool doesnt show any codes, so I arent sure of the problem
I cannot drive the vehicle as there is no power at all
Help me!!!

[isuzurob]

Either the scv in the injector pump is faulty or theres something in the airflow meter are the 2 most common issues on them, also egr valves play up aswell my my pick is scv since it faulted under power

[yowiie]

But wouldn’t a code show for these issues

[isuzurob]

Not all the time, also the egr butterfly in the inlet can jam, but that definitely bring up a egr code, you said engine light came on so there will be a code stored, is the garage using a tech2 or generic scan tool?

[yowiie]

It’s a generic machine,!i have been on another forum and it was suggested that it could be the scv at fault

[isuzurob]

I worked for isuzu for 12 years so do know them very well, generic scan tools only tell you half the information

[yowiie]

So I believe, what’s your thoughts on the scv being at fault

[isuzurob]

Very high in 07 to early 09, in 09 they fitted revised and far better scv but they still fault now and then, need to get tech2 on it

[turnturn]

What does SCV mean?

[isuzurob]

Suction control valve, it goes into the injector pump and controls the flow rate of the fuel pump electronically