I now know the sound of knock/ping!

LinuxRacr

Contributor
:
2001 Mazda MP3
Well, for the last couple of days when I hit boost, sometimes I would bog out, so today I pulled my Fuel Pressure gauge from under the hood, and stuck it under the wiper. I hit boost a couple of time, and I notice that I am at about 80 PSI max, so I back off the tuning screw a little. I keep on tuning, testing, stopping, and tunning until when I heard something that sounded like someone "playing craps" from the engine. That's right, it sounded like my engine was rolling dice!:eek: I let off immediately in dissbelief. I did it agian to be sure, and sure enough it did it again. The Fuel pressure gauge now read just above 70 PSI. I did the Tune-stop-test-tune thing again all up and down Cooper Street until the pinging went away. This was at 75 PSI. The engine no longer bogged out..my power was back!:D Note that yesterday I was running 93 octane WITH Outlaw Octane Boost when this occured.
 
Wow... Yeah that's wha tmy ping sounds like... I haven't done a Stop and tune for a while... The last time I checked I was running about 72-73 psi. I hear ping when running 92 octane, but I try to run as much 101 as I can. And haven't heard ping when using that. When I put the off road pipe on this weekend and up the boost to 8- I will do another test and tune, and try to get up to at least 80psi.
 
BHAhahahaha.. Yeah me too. It's my 5 yearold niece. It was taken when she was three. She's nutts!!!!

:D
 
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