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Truck Repair/Loss of power while driving

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Question
Had cruise control set at 59mph. It kicked off, I accelerated up to 59 and reset. 20 minutes later it did it again, but this time, when I accelerated, it was as if there was no throttle response. It only lasted for a few seconds, then I had power again. I left the cruise off, used the throttle. About 60mph, 20 minutes later, it happened again, but this time~the speedometer gauge dropped, and I heard a faint air pressure sound from under the hood (Like when you turn the key on initially) 3 times. It slowed to 40 mph, and RPM's were fine. Then, it suddenly kicked back up again. Ran fine til I stopped. Once I was stopped, I checked gauges, fluids, etc...and everything is fine. I'm at a loss as to why this is happening. It starts right back up, as well.

Answer
What year, make and engine we talking about. could be a wire has a bad spot causing it to short out. could be with your speedometer dropping off the tailshaft speed sensor. freightliner ties cruise into the air supply with a relay valve under the dash. Might check your fuse panel they like to use breakers instead of fuses they are same width as a fuse just taller if you don't know if the breaker gets weak it will cut off every now and again. If that's the case you can replace the breaker with the same size fuse.  

Truck Repair

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Jeff Drumm

Expertise

I Can answer any question pertaining to semi trucks and trailers. Have no experience in the automotive field so not able to help in that area.

Experience

My experiences in Semi Trucks is. I own my own truck and i presntly maintain a 80 truck fleet. Can handle any questions pertaining to a truck have tore apart and rebuilt every aspect on them. Fleet I deal with is Mainly Volvo trucks and a handful of freightliners. Work on automated transmissions on a daily basis along with carrier apu's. With engines my specialty is the 60 series Detroit but do work on the cummins isx the n-14 and the ism. and also the Volvo engines.

Education/Credentials
Have a College Degree from university of northwestern ohio in diesel and agriculture mechanics. Have 10 years behind the wheel driving a truck and 4 years working on trucks full time. Also have grown up on a farm so have been tinkering on trucks and tractors all my life.

Awards and Honors
I've gone through online schooling and have received certificates from webb wheel, Timken and Volvo academy.

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