Ok, need a little input on this one, when I have my truck in park at idle, the truck will shake pretty good. RPM's stay normal, and if I give it a little throttle it goes away, let off it shakes, this has only happened a couple times, 3-4. I figure my tranny is on the out, it seems to me that the converter is trying to lock, or the VB is losing pressure. The only confusing thing is the truck is in park......any ideas?

 

mine dose it also but i have a manual. I was just guessing it is a injection problem, but not sure??

 

Mine does it when the a/c kicks in, but it never used to. Its also got an injector tick, i'm taking it in to the shop next week to see what they say.

 

I had a bad injector nozzle once and it made the truck shake at idle. After I changed the nozzle it smoothed it out nice and right. Not saying that's why your's shakes, though. Could be fuel, injectors, quite a few things.

 

Could even be a bad fca.

 

Mine does that occasionally especially in the colder months when it a grocery getter and I don't tow much. It has been along time since it has done it since I have been towing frequently for the past several months. The injectors seem to get gunked up after riding around not putting much load on the engine for awhile. Give it a good workout - nice heavy load and a long steep hill outta get her cleaned out. Get it hot and keep it there awhile and the junk will burn off and it will run like a top.

 

Mine does this also. In idle I can feel a very slight shake and if I give it throttle to about 950rpm it gets worse then smooths out. Seems to do this after idling a while. If I run it good it goes a away and will come back at some point. The odd thing is I can have the issue, reinstall the smarty jr program and it goes away without driving it. Just start it up and it's gone. Any ideas?

 

Kind of a long shot here, but make sure you don't have something getting lodged between the trans or motor mounts and the frame or something. My truck will do that in the winter if the trans mount gets full of ice.

 

You have a carboned up injector. Go tow heavy with it or run the crap out of it and it will go away. My truck has done it before. This always fixes it up.

Long heavy pull is best.

 

I have a shake that just started like this at idle. But with a little throttle while sitting still, it's not going away. Until you get moving then it's gone. I'm hoping I didn't loose an injector like some are saying. I have been playing with the REVO update so I'm hoping it will tune out. :/

 

Mine does it as well I think it is my clutch that is doing it to mine. Has bran new Exergy injectors bc I thought that was the issue. Did you figure it out

 

You G56 guys. If you’re running the stock clutch and have vibration at idle; take a look at your dual-mass fly wheel. It will vibrate as it begins to fail.