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2005 Mustang GT with 87 diablosport tune, causing misfire??

Posted: Mon Aug 11, 2008 3:25 pm
by Jordan
I was driving my car the other night, a little harder then normal, and i wanted tot ake it up to top speed. At about 135MPH my engine light started blinking, which means the engine was misfireing...i have the 87 diablosport tune uploaded in the car. Any idea whats happening? Could the tune be causing this?

RE: 2005 Mustang GT with 87 diablosport tune, causing misfir

Posted: Mon Aug 11, 2008 3:58 pm
by sohfast94
Any codes?

RE: 2005 Mustang GT with 87 diablosport tune, causing misfir

Posted: Tue Aug 12, 2008 2:50 pm
by concoursd
what was your speed limiter set to? stock speed limiter is 140 mph

Posted: Wed Aug 13, 2008 6:30 pm
by Jordan
The tuner is showing no codes, and i believe the stock speed limiter is set to 149MPH/240km.h on the 05+ GT's, and i hit about 136 when i noticed the engine light blinking, meaning misfire. Maybe i just got some bad gas, not sure.