answersLogoWhite

0


Best Answer

A good place to start is to check for leaks in the vacuum lines associated with the heater controls. Many of the controls are vacuum actuated & if there is a leak in a control or associated line it may cause a rough idle

User Avatar

Wiki User

14y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: Why would a car shake if the heat is on?
Write your answer...
Submit
Still have questions?
magnify glass
imp