Car Vibrates once Turbo Kicks In...

[JaMoDSM]

Got a 91 Eclipse GS-T and this happened before, but eventually after a couple days it went away.

I can drive the car just fine. But as soon as the Boost goes up passed 0, the car starts to vibrate a bit. If I get it up to about 7, then the engine seems like its going to hop outa my hood. Anyone got any ideas?

 

[fasteclipse1992]

what shape are the motor mounts in? my car does the same thing i need to change my motor mounts.

 

[JaMoDSM]

well i changed out the front and the left one... i still need to change out the tranny one and the right one... but supposedly their not completely busted

its just weird, cuz the the car won't vibrate for a long time... but like this morning... JIGGA JIGGA JIGGA JIGGA!

 

[JaMoDSM]

ok, now the car is only vibrating mostly in 5th once i hit 7lbs of boost... if it wants to go higher it'll vibrate... and usually after going 60mph... in 4th it'll only vibrate when its near 10lbs of boost

 

[crankbender]

Check your spark plugs and regap them. Heck if they arn't new replace them with some copper plugs (like 4 bucks total).

 

[JaMoDSM]

hmm, they're the NGK 6 plugs and they're only a month and a half old... and my cars been in the shop for the past month... but i'll check em...

 

[crankbender]

Does it matter how fast you are going?

 

[JaMoDSM]

well i have no idea what i did, but my car seems to be doing ok now... see what i mean . my car is weird... i checked the spark plugs they were fine, put em back, and then later in the day, no problems... oh well, thanks for the info guys.

and to answer your question... not really, speed had nothing to do with it... it was just that when i was in 5th gear, and i would get past 7psi my car would shudder violently... in fourth it was when i got past 10psi, either if i shifted down to pass a car, or while i was just accelerating... weird huh? i thought it might have been a boost leak, but i dunno, that or my motor mounts for the tranny and on the right side might have just busted