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Acceleration Shudder

 
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  #1 (permalink)  
Old 13 Oct 2016, 10:33 pm
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Default Acceleration Shudder

2004 Turbo with an automatic and 73,000 miles. On normal easy acceleration, everything is fine. Upon moderate to hard acceleration, there is a definite shudder somewhere in the front end.

Where do I start looking ?

Transmission ? CV joints ? Motor mounts ? This is a new one to me from having had three Cruisers so far.

Mark.

Last edited by markroach; 29 Oct 2016 at 04:29 am.
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Old 14 Oct 2016, 12:25 am
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Default Re: Acceleration Shudder

I would suggest checking the upper and lower motor mounts first.

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Last edited by ptcruisersteve; 16 Oct 2016 at 12:07 pm.
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Old 14 Oct 2016, 07:05 am
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Default Re: Acceleration Shudder

What Steve said. And if that's not it, you might try rotating the tires and see if it moves to the rear. If not that, then take a look at your axles.
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Old 14 Oct 2016, 08:34 pm
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Default Re: Acceleration Shudder

Thanks guys - gives me some place to start looking.

Mark.
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Old 14 Oct 2016, 09:24 pm
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Default Re: Acceleration Shudder

You said Re: Acceleration Shudder

If no DTC(s) then it is drive-train related. The engine struts as Steve said are the first but if you are accurate with your description then you may have the week end task of replacing the the lower engine mount.
I hope it is the easier to find at fault

Good luck!y
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Old 16 Oct 2016, 11:34 am
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Default Re: Acceleration Shudder

Quote:
Originally Posted by NitroPT View Post
You said Re: Acceleration Shudder

If no DTC(s) then it is drive-train related. The engine struts as Steve said are the first but if you are accurate with your description then you may have the week end task of replacing the the lower engine mount.
I hope it is the easier to find at fault

Good luck!y
So, I understand that there is a upper engine torque strut and a lower torque strut. You are saying there is a "lower engine mount",,, which lends me to believe there is a "upper engine mount". Where might that be?

I have a 2008 pt cruiser, 2.4 non turbo, automatic
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Old 16 Oct 2016, 11:58 am
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Default Re: Acceleration Shudder

Quote:
Originally Posted by tourhar View Post
So, I understand that there is a upper engine torque strut and a lower torque strut. You are saying there is a "lower engine mount",,, which lends me to believe there is a "upper engine mount". Where might that be?
Sorry about that! I need to pay more attention to details! I met upper and lower motor mounts as NitroPT posted.


This is the upper motor mount.

Upper Motor Strut bolts.JPG
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Last edited by ptcruisersteve; 16 Oct 2016 at 12:13 pm.
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Old 26 Oct 2016, 06:04 pm
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Default Re: Acceleration Shudder

UPDATE ....

Both motor mounts were shot along with both a-arm bushings. All is good and solid now. Thanks for the help guys.

Mark.
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Old 29 Oct 2016, 04:27 am
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Default Re: Acceleration Shudder

Ok, after having some time to really drive the car for a few days, I will say the repairs have made it considerably better, but not completely.

I can still sense a bit of shudder on acceleration. Replacing the two engine struts helped considerably though. This is what I'm noting at this point ....

- Car idling, runs very smooth (just did tune-up)
- Car in drive, brakes on, very noticeable vibration
- Apply slight throttle (brakes still on), vibration gone
- Brakes on - turn on A/C, vibration gets considerably worse

I believe whatever this vibration is, is translating into the shudder I feel when accelerating. My mechanic is thinking it may be the main motor mount needs replacing as well - that's a tough one.

What say the resident experts here ?

Mark.
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