1992 Infiniti Q45 my car shakes in park and when i brake.

1992 INFINITI Q45
222,882 MILES • V8 • 2WD • AUTOMATIC
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BIANCADIAZLEO
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  • 1 POST
My car shakes in park and when I press the brakes down at a complete stop. My check engine light goes on and off and I just got new spark plugs and fixed my injectors in the car replaced 4 injectors. Car is still running rough and check engine light still comes on but goes off sometimes too.
Jul 12, 2010 at 10:14 AM
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MHPAUTOS
  • ✓ASE Certified Mechanic
  • 31,937 POSTS
  • ASE Certified Mechanic
Hi there,

Thank you for the donation,

You may have a defective brake booster that is leaking engine vacuum when applied, ( the booster uses engine vacuum to operate) i would have this checked first.

mark (mhpautos)
Jul 12, 2010 at 8:19 PM
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