hello - I need some advice on my truck. Recently it cuts out on acceleration at high speeds. Instead of shifting down to pass someone - it cuts out and has a ping noise in it. Almost acts like it doesn't have the power to shift down. I have a hypertec performance chip on it and K&N filter on it. Recently changed the MAP sensor. Always gets serviced on time. I never take it off roading - its a pretty spoiled truck. Any suggestions???? Thanks -

 

Throttle Position Sensor perhaps.