I have a 2002 silverado 1500 4wd 5.3L, the service engine soon light is on. So I pulled the code and I get 4 different codes P0327, P0102, P0122 and P0332. When I first start the truck up it idles fine unit the engine starts to warm up. the engine will rev up to about 1k rpm then die down, i will do this off and on. also when I am driving it if i smash the throttle it will not rev up past 2,500 rpm. I did a fuel pressure test and I was get between 47-55 psi. I also checked for vaccum leaks. has anyone ran into this issue before, I don't think that all four of these sensors are bad and I don't want to just start replacing stuff.

thanks

 

Intake Manifold gaskets sucking air can make the MAF and TPS reading appear wrong to the PCM because of the unregulated airflow picked up on by the O2 sensors.. This could trigger the PO102 and PO122 codes. Rough idle when warm is common with leaking intake gaskets because the fuel mixture is much richer when cool and then leans out as it warms up. The gaskets sucking air makes it run even leaner and causes the rough idle.. The PO327 and PO332 are common also.. The Knock Sensors located in the valley pan under the Intake Manifold. They sit in recessed holes with rubber boot seals that commonly leak water into those holes and cause the Knock Sensors to corrode.. You have to remove the Intake Manifold to change the Knock Sensors and their harness. If you go back with the updated style Intake Manifold gaskets you could fix all of your problems in one swoop.