engine and drivetrain Engine shake (video

[Bimjam02]

SO i get back home after a month of being gone for work and i go to start up my car and after a few tries and a shot of starting fluid she starts right up like nothin. the issue is my engine is shaking a lot at idle. i remember when i parked her a month ago i hit a bump kinda hard right before i got inside my garage and i thought i remember feeling a shake but i was in such a hurry i just shut her off and didnt take much thought into it. in the video its hard to see and it looks more shakey in real life but i figured it'd be a start. could it be the engine mounts? they're stock as far as i know and most likely the original so thats a given for some shake but im wondering is this a symptom of like the mount weld braking? the timing is spot on and the carb is cleaned and tuned and the idle is set just above 800 but in the vid its around 1000 cuz it was cold still.

[Bimjam02]

ps i dont know why theres no sound

[Guest Anonymous]

I'd start by checking the motor mounts - you can see if the weld is broken at the same time - pry the engine away from the body at each mount spot and see if the mount is still intact - I use a 2x4 on the left and a pry bar on the right. Check the tranny mount too.

[Bimjam02]

tranny mount is new a few months ago so im not thinkin its that, is there a special way to pry the engine either direction? a sweat spot perhaps?

[DUDONLY]

Check your booster..... I was driving and I hit a D.C. pothole and had the exact same symptoms you are describing. Hit the brakes while at idle and see if the engine smooths out or if you hear a hiss when you release the brake pedal.

HTH,

Dudley

[Bimjam02]

hmm interesting, ill definitely try that tomorrow. is it like a vacuum leak or something? if this is the case does that mean a new booster should be added to my list of parts needed or is it a simple fix?

[eurotrash]

..yeah, the booster would create a monster vacuum leak. And the motor is behaving like there is a leak..

[richard18]

I have a 73 BMW that does the same thing. I just though it was from general ware and tear of an older car.

[fwardell]

Sure sounds like a vacuum leak, especially if the bump caused the shaking. If your carb is set right and there are no vacuum leaks, check your valve adjustment. I couldn't get my engine smooth at idle until I readjusted the valves. What a difference!

[Bimjam02]

i figured it out. it was a vacuum leak on my intake manifold. i grabbed a flashlight to look at the booster and boom it was the first thing i notice. my plug must have popped off when hit the bump or something, it was on there kinda loose to begin with so i put on a new tighter on and wabam fixed. heres a pic of the one im talkin about. its the black on in the middle.

[Guest Anonymous]

I have a 1976 BMW 2002 and is shaking like you swaid after being sitting in the garage for a couple of months. I try to plug the same hole and it turn the car off it seems to need the air inflow. What else could be causing the shakes. San Antonio TX

[Bimjam02]

my thought is it could either be a gummed up carb or another vacuum leak elsewhere.