Vibration at idle and acceleration after hitting a deer

mrjay62 · Post by **mrjay62** » 18 Mar 2021, 15:22

Hi everyone. .
Not new here just haven't had any problems that I couldn't handle on my own.
But now I have a problem that I can't figure out.
About a week ago I hit a deer going slow maybe 25 I seen them slow down before I got close to them moved to the center line about to accelerate and passed them and one did jump in front of me from the opposite side. No real damage bent the license plate pushed in the grill.
After Pulling over and going to look for the deer which ran off Got back in the car started it up and noticed I have an a vibration at idle and acceleration. So far I've checked coils and plugs each coil is contributing look for vacuum leaks Did a smoke/ throttle body cleaner test Checked every hose and the hard piping to and from the turbo. Even locked the Cams and checked the timing. Did install new plugs, pumped air into the inner cooler just in case it had a hair line Crack. Not finding anything. . Any advice would be most welcome. Thanks guys

Post by **kallekula** » 18 Mar 2021, 15:30

Could be a sleighbell stuck up in there

mrjay62 · Post by **mrjay62** » 18 Mar 2021, 15:33

lol too late in the season for that...
But I'll check
Thanks

Post by **abscate** » 18 Mar 2021, 23:08

Look at the vacuum lines on the purge valve and perhaps the manifold sensor wiring up there?

That could explain the bucking

( sorry, that was too easy to resist)

mrjay62 · Post by **mrjay62** » 18 Mar 2021, 23:18

Funny guy.
How are you?
I checked every vacuum line..every wire connection I could get my hands on ,not finding anything. No codes have been set looking at maybe the front motor mount, passenger side to me it looks like it may be sitting on the subframe. So far that's all I got...
It's gotta be something simple and I'm over looking it.. I hope.

Post by **oragex** » 19 Mar 2021, 10:36

Can you describe more the vibration ? Do you feel it in the steering wheel ? Floor ? Is it only engine vibration ? Did you brake hard ? Tested each cylinder by unplugging the injector see if there's no reaction ?

mrjay62 · Post by **mrjay62** » 19 Mar 2021, 15:45

Hi Oragex.
After breaking hard to try and Not hit the deer that's when felt the vibration I feel it in both steering and floor. .
Just tried your suggestion unplugged each injector one at a time while it running it stumbles pretty much like it would when I unplug the coils each one did the same thing. Next is the purge valve under the intake manifold. My hands won't let me disconnect the hard line..I am going to have to remove hard pipe to the throttle body again
The only thing I'm suspicion of is the front motor mount passenger side seems like its resting on the subframe, they were replaced 3 years ago with I believe there called Hutchison brand. Also With my hand on the motor it's not overly vibrating I guess...
Just never felt like this from inside the car.
Also it doesn't feel bad if I lay on the ground and hold my hand on the subframe.
So that's were I'm at now.

Thank for any input.

Post by **jonesg** » 19 Mar 2021, 18:01

I think you found it already with that front mount collapsed, the lower motor mount bolt should sit above the frame.
I have a new one sitting in the box, its on the list of what I wont be doing today.

mrjay62 · Post by **mrjay62** » 19 Mar 2021, 18:06

Thanks ..
I did order one earlier today.. we'll see if that cures it or causes more curses.
Other that testing the purge valve. I'm lost...

Post by **vtl** » 20 Mar 2021, 09:45

Check STFT and LTFT, any OBD-II scanner will do that. It will say whether you have vacuum leak in intake or you need to look at something else. Good running engine will have STFT oscillating around 0.98-1.02 and LTFT a few percent from zero in either direction, less than 2 ideally. Even slightly misfiring or late firing engine, beyond detection threshold in software, will through fuel trims off.

I would check all the engine mounts, especially upper and lower torque rods. If they were old and had collapsed during hard breaking - there will be a lot of vibrations felt in cabin. It also could be the subframe shifted forward and needs to be realigned. You may check it by looking at the driver side rear bushing, it is easily visible from outside. If it had shifted, you'll see a mark on the paintwork.