Engine shaking vibrating help!

Your engine is toast,don't go anywhere far

 

might need some cleanup work, how many miles on her? does she burn any oil?

 

Bad motor mount? Misfiring?

 

Rough Engine Start? Knocking Noise At Startup? There May Be Hope Yet... | PriusChat

 

^ Yes, how's oil consumption?

 

Original owner? Ever change the PCV valve? Clean the intake manifold? Does the engine throw any codes? Loss in mpg? How long has the oil consumption been at that rate? Egr been checked?

 

Many possible causes. One is something called an EGR valve, which is currently covered under an unlimited mileage warranty!

NEW!!! Service Bulletin for Engine Knocking at Startup T-SB 0012-10 | PriusChat

However, another possibility is, if you're losing oil because of failing piston rings, it will cause the EGR valve to become clogged. You or a mechanic can clean this out and bring some life into the car. Some engines with bad rings last a very long time, but with Prius (and probably many others) you need to clean out the clogging which this condition can cause.

Or it could be something else...

 

did you do the plugs at 120k? is the air filter clean?

 

Cleaning out the EGR valve is somewhat involved, but there's a NutzAboutBolts video which shows how to clean the EGR pipe, and that's very easy. This is the pipe between the EGR valve and the intake manifold. If this pipe is showing signs of being blocked, then maybe you should consider cleaning the EGR.

Another poster took his car to an independent mechanic who actuated the EGR valve a few times using his diagnostic scanner tool, and this apparently un-stuck his EGR and solved his problems.

 

lets hope it's ERG/intake needing cleaning and isn't a HG. any disappearing coolant?

 

And how many miles are you going in that time?

This doesn't sound good, btw.

 

Is it every cold start?
or a cold start AFTER you had previously driven the car a very short distance, say backing it out of the garage and shutting it off?

 

Fix head gasket/ coolant pressure issue in one second: take off the little rubber ring on overflow reservoir cap. The pressure in coolant system will be stable atmospheric. No more 15psi pushing coolant through gaskets etc.

 

Nature of "cold start" issue is accumulating coolant inside cylinder. Too much pressure. It happens 75% of stars, due to random position of the bad cylinder piston

 

welcome, and thank you!