: bad engine shake

07-18-12, 05:50 PM
When the car is idling the engine shakes pretty bad. When I give it some gas it seems fine.

07-18-12, 09:20 PM
The rest of the car doesnt shake so Im thinking the engine mounts are crap.

07-20-12, 09:43 AM
I have seen some messed up carbs make an engine shake. If it is the carb it will probably get worse. Although you have a 72 with points so all bets are off. I always blame the points first.

07-20-12, 11:32 AM
I could try the points first cuz they're pretty cheap. Are they pretty easy to replace?

07-20-12, 11:43 AM
How badly will changing the points mess with the timing?

07-21-12, 10:32 AM
I may have misunderstood your shaking. I was thinking of a bad shake like an out of balance washing machine. If yours is a mild shake and it runs pretty good.........it could still be the points; especially if you don't know when they were last changed. They do have to be adjusted so you either need some old guy to do it or read up some old manuals.

07-22-12, 03:17 AM
They looked pretty dirty, but the rotor and inside the cap were clean though. They're all cheap parts so I'm gonna do all three. My neighbor said hed help me adjust em. I'll report back when they're done.

07-22-12, 03:18 AM
The dist cap wasn't sitting snug cuz one of the spring clips was broken.

07-22-12, 10:18 PM
I had the same problem, turned out to be a worn throttle shaft bore in the carb base plate.
Even tiny play will allow additional air into the engine causing rough idle and/or stalling.
-> carb overhaul
You could also check torque on carb and intake manifold bolts.
Worn carb gaskets may cause leaks as well.

08-20-12, 06:00 AM
my 78 fleetwood used to shake bad at idle until i made her suck back a can of seafoam threw the pcv valve and she is still fine right now