Hesitation and high KR Cold weather issues?
- Thread starter ShoBoat
- Start date
SHOdded said:Still all good, ShoBoat? I am not hoping for more frigid weather for you, but if it does give you the opportunity, do the reset and test with 93 version of V8 maybe?
All good, I did another fill up at the busiest gas station in the area with 94. Did the reset procedure and installed the 93v8 tune. All is good so far! No pressure drop or misfires or hesitation.
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panther427
New member
Take a look at this sae study on gtdi/tgdi. Wonder if you could be experiencing this.
http://www.stratifiedauto.com/blog/low-speed-pre-ignition-in-the-mazdaspeed-disi-and-ford-ecoboost-motors/
http://papers.sae.org/2015-01-0758/
http://www.stratifiedauto.com/blog/low-speed-pre-ignition-in-the-mazdaspeed-disi-and-ford-ecoboost-motors/
http://papers.sae.org/2015-01-0758/
panther427 said:
Interesting read, could be in regards to the KR I was seeing. But I am pretty sure that was winter gas. I am going to do the BG fuel service, I know that FMC isn't crazy about this type of service. However they have been doing it on turbo cars forever. And if you think back to the carb days of old they had a similar issue of "cooking" of the valves. The fuel was not sprayed like in TPFI right on the valves. So we have come full circle. And back in those days it was a can of carb cleaner and away you went
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Just wanted to give a final update on this issue. It has stayed gone.... I still can't 100% point to a solution, maybe several things as stated earlier. She is still pulling timing but not at the same level as before. I tried a few different gas stations. And the 93 Esso had the worst KR (Weird since it's a really busy one), with the best being a Petro Canada 94 station. WOT HP fuel stays above 1800 PSI at all times, KR on the 94 Petro doesn't see above 3.0. I just wish I knew for sure what the issue was. One more mention that all the Gas in my area at least above 91 has 10% corn.
So it seems that I have resolved my weird KR issues, and let's just say it wasn't what I expected at all. I know have 0 KR pretty much all the time. Even lugging in a high gear at 55 to 70 mph. I have seen boost levels as high as 9 psi in 6th with no KR in fact it's adding timing same as last year. Now that I have a fix I will post a how to.
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ecoboostsho
New member
Excellent! Can't wait to hear what it was.