so i have a 91 240 w the later model FI system, and it has been quite literally jerking me around lately. the engine starts right up and runs smoothly while driving but shakes like a rodeo bull at idle. at no point does the engine sputter or want to die, and it does not even hesitate under load. the shaking is more pronounced when the car is fully warmed up, sometimes it will run quite smooth when immediately started. I have obdI on the car but the code station does not show any error codes despite the check engine light coming on occasionally.

any ideas? advice on halfass quick fixes?

 

It sounds like bad motor mounts.

 

I had the same problem...86 240 wagon...shaking like James Brown's legs...HEY!!!!!! I had to replace the cyl gasket and timing belt...I don't know what did it...I had a hole on my cyl heads and required a new one....the marks on my crankshaft was at 30...placed it back to 0 and the rest of timing...havent had a problem since...