Expert: Sean Halliday - 8/28/2006

Question
hello
sir my 1995 5401 is always shakey when idling runs fine you cant drive it until get it warm if you dont warm it she will be hastate to move i spent $1500 to put new oxigen sensor spark plugs pvc breather transmiton oilchanged please give me advice to fix this THANK YOU

Answer
Sounds like you have a misfire,,you didnt say how many miles you have on the engine ..it is possible im thinking that you have high mileage and the valves are worn which will cause a rough idle,,also you might want to check the spark plug wires.just in case you have a bad one.main causes for rough idle ,,,,EGR valve sticking ,,uneven cylinder compression(worn valves),ignition fault,( plugs or wires),,leak at intake manifold,fuel filter,,,,you can buy a simple vacuum tester and it will tell you whats going on with your engine theyre available from auto stores for around 40$.they help a lot.