Tach spiking with Paxton

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I have had the Paxton in for a couple months now. And once in a while the tach will spike. This happens intermittently, the car will **** when it does. Sometimes on acceleration decel, or just idling.

Funny thing, I think it may do it only with the AC on. Any one heard or have a similar issue?

Oh yea, it's a 04 SRT-10. On a side note during the Dyno tune the power curve was not smooth but rough the tuner asked if I had old gas in the car. The gas was fresh and I put in new stock Champion plugs during the Paxton install.

Thanks, Len

 

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Ok, checked everything over. My connections are soldered so didn't think that would be an issue. What I did find is the power wire to the motor for the adjustable pedals was rubbing on the clutch pedal and had worn through.
Relocated the wires and went for a drive after I checked everything. No more tach spikes so I guess somehow that was the cause?