Yeah it vibrates mainly when i'm on the brake and the a/c on. a little in park very lightly. if i turn the a/c off no vibration, turn it on vibrates.

 

Yeah did you ver have it checked? if so whats the problem? I'm in Florida its too hot to roll down the windows. i perfer my a/c.

 

I would check for vacuum leak. Specially around brake servo area. Diaphram on servo may be gone bad.


maachan513

 

Could be pulling RPM's down below idle speed making the car shake. Sitting still, what does it idle at? See if it changes with AC on or off. Check to see what it's supposed to idle at. Sometimes there is a sticker on the underneath side of the hood that will tell you. If it's lower that idle, see about having it adjusted.

 

Sounds like a problem with A/C, not a brake servo problem.

 

Well, in just about every car when you turn the ac on the idle goes down a little, but then it's supposed to go back up to normal. I never did have mine checked out, so i couldn't tell you what the problem is, but for me, the vibration sound comes out of the glove box area back around where the evaporator and expansion valve are. Who knows, it could just be a loose fan or something.

 

wow, lot's of weird advice on this one. sacicons is probably dead on. it's a motor mount. look at them to see if there are any visible cracks in the rubber or if they are completely broken out. check the side by the a/c compressor and in the back first. these are the 2 that get the most load.

 

ok thank I will try this.

 

I just looked at the mounts in my 93, and the one on the front passenger side that mounts the transmission is all cracked up and missing rubber halfway up the "bottom" part of the bushing. Never noticed it until I was replacing all my cooling hoses. I was thinking "uh oh that ain't good!"

I too have mega vibration at idle. It's a little better than it was with the old main fuel relay (explain that) but it still shimmers and shudders and shakes at idle. Rev it up and it's not so shaky.