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Discussion Starter · #1 ·
Have a 2009 Malibu 4 cyl. Won’t rev up above 3k in park. Boggs down past that. Won’t accelerate about 20 mph or so. No engine codes.

aaaand go!
 

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2017 SS Sedan 6.2L
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It's designed not to rev above 3000 rpm in park.

Can you elaborate what you mean by "Won't accelerate about 20 mph or so"?
 

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Discussion Starter · #3 ·
Thanks for your reply.

In gear, the car will not accelerate above 20 mph or so. It boggs down when pressing the pedal down and will not gain speed. Almost like a rev limiter would do. Can hear the vacuum drop when putting the pedal down, but it doesn't gain, just boggs.
 

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Full scan of all 4 code families, not just P codes, and a fuel pressure check would be my course of action.
 

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2011 Malibu LTZ 3.6L V6 Red Jewel Tintcoat
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What trans does it have - 6-speed or 4-speed? (Most likely 4-speed, but gotta ask to be sure.)

Thread title edited to include vehicle info.
 

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2011 Malibu LTZ 3.6L V6 Red Jewel Tintcoat
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Still waiting on requested info: trans and codes.
 

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Have a 2009 Malibu 4 cyl. Won’t rev up above 3k in park. Boggs down past that. Won’t accelerate about 20 mph or so. No engine codes.

aaaand go!
Sounds like your catalytic converter might be clogged. Take out the forward o2 sensor and drive it around the block, that will tell you if it’s your converter
 
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