Q: My 1999 Ford F-150 shakes when I accelerate over 75MPH

Depending on the size of the crack in the manifold, this could potentially cause something like this to happen, however it may also be related to other issues as well. Stalling (https://www.yourmechanic.com/services/car-is-stalling-inspection) and lack of power may be also caused...

As you may know the AC Clutch is the pulley that spins with the Belt. There are two ports on the rear of the Compressor. One is a Suction Port and the other is the Discharge Port. The Suction port...

Hi there. It sounds like you may have a failed starter or battery. A good battery test with a digital battery tester that provides current voltage, cold cranking amps, and state of health will either clear or condemn the battery....

Hi there. Unfortunately, due to the complexity of this type of work, and the importance of using a shop to complete this task, it's not a service our mobile mechanics offer. You should contact a local speed shop or engine...

Hi There, I think you are on the right track in thinking of things like the alternator or the water pump as those are two things that immediately will correspond to RPM change when accelerating. If it is the alternator...

The IAC (Idle Air Control) valve is required to have a vacuum line on it to work the engine properly. The line from the carbon box filter is supposed to be hooked to it, but it may be damaged. Take...

Hi there - your engine, like many others, uses an oil-pressure operated mechanism, sometimes called a cam phaser, to vary the camshaft timing (aka variable valve timing). This mechanism delivers additional power and fuel economy for more recent engine designs....

Hello - there are several possibilities here: first, perhaps the shifter cable(s) have broken, or detached themselves from the shifter or transmission, and you're not really in gear (hope for this - this is the least expensive to fix. Second...