So i have a 5.3 v8 2002 1500 silverado withe cylinder 7 misfiring i have loss of power after truck warms up from long drives the power loss went away after i changed the intake and gaskets, changed fuel pump, wirres plugs and that coil also changed o rings on injectors and cleaned them they looked intact. i dont know what else to do, only thing i have not done is a compression test any sugestions also replace map sensor and tps sensor
im lost.

 

It's not a sensor. Compression check.

 

When I get time next week I'm going to pretty sure that's the problem! Keep ya updated thanks