Fuel pressure at Shrader valve
 

My pickup died and CEL came on the pressure at shrader valve is jumping from 40 to 80 psi instead of the 75 it used to sit around at idle. Wiggled wires and wont change or die cleared code P1211 ICP above below desired. Unplugged ICP threw code and ran slightly rougher. Fuel is coming from front tank gonna fill rear and see if that matters.

Anyone else had this issue, maybe clogged fuel straw in tank or something.

Thanks

Anywhere from 30-70 is fine. The CEL has nothing to do with fuel pressure, your truck has no idea what fuel pressure is (from a PCM standpoint) Sounds like a CPS issue...

Died about four times while downshifting from third to second yesterday. P1211 ICP and boost code came up every time. Have a scanner hooked up but couldn't see pressures change enough to kill it. what should pressures of ICP and IPR be? I am using determinator scanner.

It depends greatly...

You should see at idle about 600-900 ICP at 12-17% duty cycle...

Do you just have to replace cps or is there a way to test it

Just replace it. If that wasn't the problem, you will have a spare. You should keep a spare in the glove box anyway.

Do you have good fresh oil it with the proper rating? Any recent repairs involving silicone?

won't start now. What screens on the fuel side is there to clean

Make sure your batteries have full charge. You need atleast 100 rpm for computer to allow injection. Then watch your rpm gauge as you crank, If it shows zero, then your cps went completely bad. I'd still replace it regardless.