How do I fix sudden RPM surges in a 95 Mustang GT 5.0 SN95?
After driving 15-20 minutes the RPM gauge jumps from 1 1/2 to 2 RPM and the motor rev's up like I'm pushing down on the gas pedal but I'm not. My foot is steady on the pedal. I think my engine fan is turning on when the RPM gauge surges and turning off when it stops. Why is it doing this and how do I fix it? How do I know if it is the engine fan or not?
Hi Travis, no I'm not running a/c or heater when it happens. It happens after the only after the engine warms up. It doesn't happen every time its warmed up either. There are times the RPM gauge will surge for 10-15 seconds then stop, and do the same thing a few minutes later. But that don't happen every time either when it surges back to back. It seems to happen more often during summer months.
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