HELP..WHY IS MY ENGINE VIBRATING????

[wsudu]

I started my truck the other day, and the whole damn thing vibrates a lot when you wrap it up just a little, maybe to 1400rpm. I checked the balancer, fine. I listened for anything unusual, nothing. It seemes to run fine, but It really vibrates. I mean if something really broke inside the engine, I would know it right, cause it runs fine. Any suggestions? Thanks Brian

 

[thatK30guy]

Could have a vacuum leak.
Could be the choke is not working properly.
Could be missing on a cylinder or two.
Could be........?



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[DuneRunner]

Motor Mounts going out...
could be......

Later <font color=green>KEN</font color=green>
Fremont, CA
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[Sparky]

if it runs fine i would check the moter mounts. Does the engine torque over alot when you put it in gear or from drive to reverse?

Sparky

When all else fails... Check the blinker fluid.
78 K-5

 

[bigblue]

motor mounts, have someone look while you are holding the brake and gas at the same time....(not in front of the truck of course). If the engine raises up high you will know...

Surfing is Life...

 

[BOWTIE]

maybe your sparkplugs are fouled up...

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[morphed86k10]

I'll second the spark plugs being fouled as something to check. My motor was running fine when one dsay I started it and it was shaking at idle and anytime I was on the gas at low RPM, more gas made the shake worse. I was down on power too. A simple change of spark plugs and it runs smooth like it used to.