I've been trying to figure out if I have a broken motor mount or not, so I took a video of them and the motor shaking while the engine is cranked. Its a 4cyl engine. Note: The motor is not running......I pulled the fuel pump relay out so it wouldn't start.

 

yea i would say...lol that isnt normal

 

does it vibrate hella bad while running?

 

no, its fairly smooth at idle, but when you mash the gas, the shifter will shake, and if you get on it hard and the tire starts hopping, the shifter arm will shake bad. When ever you crank the motor, it shakes the WHOLE truck, and you can really feel it, specially if you remove the fuel pump relay to let it crank over longer.

 

well i wouldnt hurt to change it being you have 140k on the truck.

 

Not getting fuel to the motor will make it vibrate like freaking crazy, after i totaled my truck i tried to start it and forgot the fuel switch, i shook the whole truck real bad, but as soon as i reseet the fuel switch and the motor got fuel, she started right up smooth as can be, i wouldnt crank the motor to much without fuel my guess is its real bad on the motor trying to start it with no fuel

 

well, it does the same thing when cranking it normally without taking the relay out. And its not bad on the motor trying to start without fuel, the starter just has to work longer.

 

lol... i told you that you had a bad motor mount(s) like a year ago when you asked..

mine was doing almost the same thing, just not that bad.

 

you mean yours wasn't shaking as bad as mine?

 

well, my passenger side mount was ripped in half, my guess is yours is the driver side, or both, but yeah, my drivetrain moved around and stuff when i shifted.

 

My friend had that same problem so I say yes they are broken.

 

I have just the deal for you! I have both motor mounts and both frame isolators sitting in the garage. Let me know how you'd like them shipped, and I'll get a quote for you first thing in the morning.

 

pm'd

 

Figure out what's broken, yet? You can see the mounts pretty well if you lift the rubber flap on the inner fender, above the upper control arm.