Thank you for the reply.

The first thing I would check here is the EGR valve, I have a feeling that carbon restriction has probably clogged this valve partially open and is causing the lack of power and other issues. If you apply vaccum to the valve directly it should kill the engine, take vaccum off and it should rev up quickly and stabilize.

Other items to check after that will be the mass air flow meter and the throttle position sensors.

There are 3 volumes of the repair manual for this truck from the factory not just one so you will need to see if your manual even has this. It will be with the engine mechanical and emission control systems.

The VSV is just the vaccum switch that sends vaccum to the vavle, if you follow the lines on this one it will end at the EGR modulator valve.

I don't use the hard copies of the manuals, most of this is in my head and then I have access to the electronic version of these when I need specs.

thank you. That's odd, it didn't show the 3rz-fe engine as an option but now I see it combined in the 2rz-fe engine manual.

if you look at the back of the intake you will see this:

The round part to the right is the modulator, the one to the left is the EGR valve. The hose that runs from the modulator to the top of the EGR valve is the hose that applies vaccum to open and close this valve.

I don't think you understood what I was saying earlier, you need to pull the vaccum hose to the EGR valve and use a vaccm pump to test the valve operation.

When vaccum is applied to the EGR valve it should kill the engine instantly at idle.

If you slowly apply a little vacum it should make the engine sputter and then release the vaccum and it should stablilize immediately.

no

You need to take this to a mechanic

I understand that but you also need to understand that you need to have some basic knowledge of the vehicle, how it works as well as proper tools to do anything to this vehicel, diagnosing a drivablility issue is not as simple for anyone as doing something like an oil change or changing a flat tire. The EGR system needs to be checked to narrow this down, then the MAF sensor and the coolant temp sensors.Peter40049.9306162847

Ask away, that's what I am here for.

Converter restriction is unlikely on this, you can remove the forward o2 sensor to confirm that this is not a flow issue.

If you remove the converter it will set converter codes, it will also raise the emissions from the tail pipw but will not hard how well the truck runs. In most states this is against emission regulations and a federal offense.....but it's your truck and your call on that one.

If you get under the truck and look at the exhaust pipe that runs off the exhaust manifold there are 2 o2 sensors on this truck, there is 1 BEFORE/ABOVE the converter and one just after. If you feel that restriction is the issue remove the forward sensor from the manifold area, don't unplug it just remove it.