intermittent sputtering/ WOT woes

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rocket455

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Joined
May 25, 2006
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Location
Fairfield, Ca
OK, so I can not figure this thing out. I can be going down the road, zero issues at all and then the motor starts sputtering, check engine light comes on, and some times it dies, others, it cleans up and I go on my merry way.

When this happens, I go to pull the codes right away and I get totally insignificant codes. i.e. Knock sensor (KS) not sensed during dynamic response test, BOO circuit failure. I have even run the cylinder balance test and it tells me all is well even though during the open throttle portion of the test, it sounds and feels like it is lacking 1 or 2 cylinders.

One more thing. When driving and going at WOT, around 5.5k RPM the motor pops and doesnt want to rev past. Im assuming that this is because of a lean fuel mixture issue. Ive checked and verified the PSI at the rails and havent done WOT since this issue came up.

Any and all input is greatly appreciated. Thank you
 

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