CAT might do it different than Detroit. I might be remembering it wrong, but Detroit use to use the center 2 cylinders for low, the front 2 and back 2 for med (middle 2 off), and all 6 for high. If it does it on all 3 settings, then my advice doesn't help much. Kinda odd.
Heavy vibration when I turn on engine brake
Discussion in 'Ask An Owner Operator' started by Moephilly1, Jan 12, 2019.
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I was taught that jakes rotates. Not cylinder specific. 1 cylinder, 2 cylinders, 3 cylinders.
I also have a 07 w9. The truck is VERY picky about the quality of fuel. And vibrates when it hates the fuel. Does both jakes AND full throttle modes. Some poor fuels aren't as bad as others.
As for pulling the codes. Turn cruise switch off. Hold the resume switch down about 5 seconds. Engine light will flash. Count the flashes. 5 flashes with a breif pause and 5 more flashes. You'll always get a code 55. If the light is off. That's standard operating procedure. Everything is working. If the light is on, It'll flash whatever codes you got ACTIVE. My common numbers are 93 and 94. Intake valve actuators for cylinders 3 and 4. It's been a few months for me now so the problems must be fixed. FINALLY.Moephilly1 Thanks this. -
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Moephilly1 Thanks this.
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You don’t need to read the flash code while it’s happening. It stored it in the computer for you. Turn key on, make sure cruise control is switched to “off” then just hold down “resume” switch until the 2 digit flash codes start flashing via check engine light
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Tombstone69 and Moephilly1 Thank this.
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Mine don't flash anything unless it's active. Triggering the light.
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