BigHoss_27

I can crank truck and it immediately shuts off or some times it will run but only like 600rpm or at 1200rpm or more

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Phoenix Ray

Any check engine light? Tune up lately? Throttle body or mass air flow sensor clean? Oil change?

BigHoss_27

Oil change good new cap rotor button wires plugs and just cleaned throttle body yesterday to no avail like it will run fine then after I stop at a red light and push clutch in the motor will drop to normal rpm then bump up to 1200 or it goes all the way to 500 and almost stalls

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scuba

Clogged IACV.

BigHoss_27

I sprayed cleaner in it when I had throttle body off seemed to be clean to me

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scuba

It could still be clogged.

BigHoss_27

Would have taken it off but the screws were impossible to turn

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Riverman

lazy IACV. I pulled mine and cleaned it thoroughly, then tested that it opened and closed by applying 12v, but I still had the problem you describe. The valve is controlled by a magnet that opens and closes it. Over time, the magnet can get less powerful and cause the valve to operate too slowly or not accurately. I changed mine recently, and the problem went away. I ordered mine from Toyota Parts Zone.

Riverman

And like you said, the screws are hard to remove. I had to use an impact driver the first time to get the screws out. Fortunately, that's a pretty cheap item.

http://www.harborfreight.com/7-piece...set-93481.html