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Leaky injectors?
I've noticed a 4 MPG drop in mileage over the last year. I had the dealership run a buzz test and a contribution test. They said everything is fine. Will these tests detect leaky cups? The PCM was also reflashed a year ago.
Anyone ever seen a 4 MPG decrease from a dealer reflash?
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Have you been putting in straight ULSD for the past year? Alot of the seals for like the fuel filter, and i think the injectors were designed to expand from a reaction with the sulfur in the fuel, making a perfect seal......thats the problem with ULSD, not enough sulfer content to make the seals work perfectly.
If you have no codes i would suggest a fuel lubricant like K-100 or Powerservice. Sorry for the late post... |
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power service diesel kleen for sure. i love it!
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