3sfe vacuum

[rshep]

My vacuum reads 22 inch-Pd's and steady as a rock. If I had a vacuum leak, sticky valves or out of adjustment wouldn't it read different? The reason I'm asking is that the car has a horrible vibration when at idle. I changes all the mounts and did a tune-up. It just sames to get worse and worse.

[fredk]

how fast does it idle?

[rshep]

I set it at 750.

[fredk]

does it run ok?

[rshep]

runs fine. Just bad vibration at idle.

[Jimnist]

What kind of vibration? Through the whole car or just when you watch the engine idling with the hood open?

And it goes away when you drive it?

[rshep]

Vibration goes away at about 1200 rpm. It's really bad when I put it in park or reverse. I cleaned the EGR valve and throttle body. It made no differance.

[Jimnist]

If it's really bad in park or reverse, maybe it's a problem with the automatic transmission?

[rshep]

Are there any vacuum hoses going to the transmission?

[Doctor J]

No vacuum goes to transmission.
Any connections between the exhaust system and body [bad hangers, etc?]
Where are you attaching yor vacuum gage?

[fredk]

what mounts have you replaced so far?

[rshep]

I attached the vacuum gauge to the intake manifold. I replaced the front twist mount by the radiator and the trans mount by the firewall.

[Doctor J]

These mounts are not causing vibration on park.
I would suggest to:
*check the right front [timing belt mount] mounting bolts; ithey are tight replace this mount.
* crack in the center mount causes bad vibration in gear, while holding car stationary with the brakes]

[rshep]

Where is the center mount located ?

[fredk]

does the mount by the timing belt have a bolt going straight down in the middle of it?