05 Malibu 3.5 L automatic. Runs good from 0-54 miles/hour. Suddenly above 55mph runs rough&shakes.

Asked by Mar 29, 2017 at 10:00 PM about the 2005 Chevrolet Malibu LT

Question type: Maintenance & Repair

Feeding a lot of gas above 54 mph often smooths out the shake, and
CAN make it run smoothly if you accelerate "just right." Then immediately
shakes when coasting back to 55 mph.
1. Feels like engine is missing at 54+mph
2. Also the right front tire is now very worn out. Outer edge now fraying to
the steel belt.  Need alignment and maybe tie rod?  
But engine problem was ongoing before the tire became so obvious.  Or
could the engine roughness above 54mph be the only problem?
  

1 Answer

78,055

You have two different issues. Sounds like you need a mechanic to look over the engine, retrieve trouble codes, a tune-up. On the tire you may have some worn front end parts, it just has to be inspected and repaired before getting an alignment, new tires.

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