99 jeep shaking like crazy

jeep
cherokee

#1

my 99 jeep cherokee vibrates like crazy when the a/c compressor is on. shakes so bad that i thought it was a problem with the balance. any ideas or do i just have a bad compressor?


#2

Consider that the AC adds quite a bit of load to the engine. If yours is performing marginally then the AC compressor will give it a load it can’t handle. So my guess is that you probably need something simple - like basic maintenance stuff. Like maybe new plugs & wires, air & fuel filters. But you didn’t even say how many miles are on it let alone anything about the state of maintenance items so its anyone’s guess.


#3

160k, relatively good shape, serviced regularly and recently, and only driven about 2000 miles a year. the engine doesn’t seem to be bogging down or sound any differently when i looked under the hood. thanks.


#4

Just because its running rough doesn’t mean it will “seem” to bog down or sound different.

Check out the plugs & wires. Do any other maintenance even close to due. (When some people say “serviced regularly” they mean oil changes). Check the fuel pressure.