[Stang Tech]

Today I started my 99 v6 and just after i started it while idling it was shaking badly. then once i got it into reverse it went away. anytime i started after that it doesn't shake. Any info would be helpful

thanks

[ReverendDexter]

So, it's not doing it anymore?

[Stang Tech]

it does it when i let the car sit for a while. once started doesn't do it.

[ReverendDexter]

What do you mean by "sit a while"? Does that mean like a week, or just long enough for it to be totally cold?

Does it just do it in Park? While it's shaking, if you put it in reverse and back to park, does it start doing it again?

Where does the shaking seem to be coming from? What sort of frequency? Does it increase with rpms, or go away if you hit the gas?

[Stang Tech]

if let the car sit long enough to cool done. only does it in park right when i start it up. it shakes the whole car it kinda of goes away when you hit the gas. seams to be from the engine. and once it goes into drive it doesn't come back if i put it in park.

[ReverendDexter]

Does it go away if you let the car warm up? Or does it shake until you do something?

[Stang Tech]

goes away as like 5 sec's after going into any gear and doesn't not return.
haven't tried just letting warm all the way up and seeing if it still happens

[ReverendDexter]

Okay, when's the last time you ran some fuel injector cleaner through it (Lucas ftw), or seafoamed it?

[Stang Tech]

i just ran some Lucas on Saturday. I will run some more tomorrow to see.

[2002 BLK GT]

Have you done a tune up? replaced the pcv valve? check for leaks, inspect your spark plugs and wires, sea foam will be a good idea......