Tahoe missfire issue

[justme1212]

I have an 07 Tahoe that has been giving me nightmares. I had a number 8 misfire I could not Trace down so I replaced the camshaft. After replacing the camshaft I had a number one misfire that I still cannot Trace down. I have replaced the head, lifters, rods, injectors,spark plugs, ignition modules plugs and wires compression tested it, and checked for vacuum leaks, everything is good I am getting fuel I am getting fire I am getting compression. I am wondering could this be an issue with my crankshaft sensor. Or any other ideas are welcome. It does misfire worse under load.

[justme1212]

I have an 07 Chevy Tahoe with four wheel drive. I had a number 8 cylinder misfire. I could not trace it down and replace the camshaft thinking the lobe was bad. After replacing the camshaft now I have a number one cylinder misfire that I cannot Trace down. I have replaced the head, lifters, rods, rockers, injectors, ignition modules, spark plugs and wires, and the camshaft position sensor. This misfire occurs randomly at idle enough to set off the code but it is worse under load. I have fuel I have fire I have good compression. I am half tempted to switch out the crankshaft position sensor. I don't know if the computer would cause a single cylinder misfire so any input or ideas would be very welcome.

[Blauvelt Rashada]

The crankshaft position sensor could indeed cause misfires, as it helps regulate the timing of fuel injection and spark. A failing CKP sensor might send incorrect signals, leading to timing issues, especially under load. Consider testing the CKP sensor with a multimeter to check for proper resistance, or better yet, replace it if it's old or suspect.

[swathdiver]

Could be the ECM.  Quit shotgunning parts at it and follow the trouble shooting guide.