Ecoboost and 5 Star tune problem
#1
Ecoboost and 5 Star tune problem
Approximately a year and a half ago I purchased an SCT X4 tuner for my F150 ecoboost. Shortly thereafter I purchased a 91 octane performance tune from 5 Star Tuning. Love the tune. Within the past month I have developed a problem with my truck and this tune. When I accelerate from a slow speed, I hear the Blow off Valve continually releasing pressure. Occasionally I will hear a heavy knock or pop and the truck seems to act like its flooding. Eventually the RPM will get high enough for the problem to go away. I will see heavy black smoke coming form the exhaust as the problem is clearing up. I have monitored the boost pressure using my X4. The boost seems to build up almost immediately after I push down on the gas. I'm talking 14+ psi almost immediately. ON any other tunes the boost takes a little time and RPM to build up. I don't have any problems with me MPT 87 octane tune and the canned tunes. I am curious if anyone else has had a similar problem. If so, what was the fix. I love this tune and want to get it installed again.
#4
#7
My experience with programming tells me that programs are very stable unless corrupted by some outside influence or unless they are "buggy". but, if they're buggy, they tend to misbehave in predictable ways, that are determined by the bugs. In the case of a program in an ECM, I don't think it gets changed by outside influences, and, I suspect a bug would show up rather quickly during its loaded residence.
But, gradual degradation of the myriad sensors in modern trucks as well as changes to other components might just create conditions that could not be handled properly by a tune that "pushes" things to maximum performance.
Now, if he's constantly changing from one tune to the other, I agree, there could be a "tuning problem", and it could have any number of causes.
- Jack
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#8
I have the knock/pop too. It will do it on the stock tune and the 5* 87 tow-performance tune. I changed the plugs to new Motorcraft gapped to .030" and there's no real change. Mine only does it when I get hard in the throttle. Strange thing is the 5* tune sets off my laser detector but the stock one doesn't. I suspect one of the solenoids that control the wastegates is doing something different on the 5* tune. They are controlled by the PCM and a tune could change their behavior.