![]() I've suspected O2 sensorsI am an advocate of preventative replacement of O2's at ~ 100k, since SO MUCH depends on their good calibrated reporting. If I give it 100% throttle, it just bogs down We also need the build date of your truck as it could be different since 07-08 was a changeover date for the head design and plugs/boots. Glad you are staying oem cops they rarely fail but can get corroded. I am not the guru that some people are on here but theres lots of help on here. ![]() Inspect vacuum lines for leaks - theres too much to cover without some clues. is intake runner linkage clear of wires and plastic ends not broken ,has the intake been taken off. is your intake tube clear,wires not chewed. We will ask if you have looked for rat damage. Are all connectors locking on and have been cleaned with contact cleaner. Did you use a small amount of dielectric grease on each end. When you replaced plugs did you get new boots. ![]() We will want to see fuel trims at idle and 2500 rpm. Torque pro $5 app ,android phone, and cheap Bluetooth reader on amazon gives a good common ground for folks on here, we may not be familiar with your system. Some screen shots of data may speed up diagnostics on here. it gives each cly raw computer counts building by individual cyl towards setting a code. Look at mode six ,its under test results on torque pro.
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