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Runs rough in reverse and in park

Tiny
CHEEVA2006
  • MEMBER
  • 2012 CHEVROLET MALIBU
  • 2.5L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 75,000 MILES
Just started after having no previous issues. Recent tune up. It misfires/runs rough in reverse and when put in park. In drive it runs perfectly fine. Any ideas?
Thursday, March 21st, 2019 AT 9:12 PM

1 Reply

Tiny
JOETECHPRO
  • MECHANIC
  • 705 POSTS
Hey CHEEVA2006,

Have you got access to a scanner?

If so please scan for codes and let us know what you have.

If you have no misfire codes please carry out a power balance test.

When selecting P, N, R and D what happens to the power balance?

Do you also get the roughness in Neutral?

Do you get a reduction in power from any cylinders?

From what you have said it sounds more likely to be a motor/transmission mount issue than a misfire.

If you have no PCM codes and the power balance checks out ok I would say check for a bad motor/ transmission mount.

Any more questions don't hesitate to ask.

Let us know how you get on.

Regards, Joe
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Saturday, March 23rd, 2019 AT 12:41 PM

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