Engine hydro-locked

2009 HONDA CIVIC
77,432 MILES • 2.0L • 4 CYL • FWD • MANUAL
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MATTY22
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My engine got hydrolocked and I got a new engine put in, now my rpm's are bouncing nowhere near as much power. Engine lights on and says 92a00 which is bank 1sensor 2 which I changed, but nothing is working. I bought a new cold air intake cause they told me to. Did not help. Told me to get a new mass air flow sensor, did not help. Any ideas on what it could be? When I am stopped it breaths weird and the rpm's bounce.
Jun 14, 2016 at 4:33 PM
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STRAILER
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Hey MATTY22,

I think you have a vacuum leak, please follow the guide below to see if you get any results, check around the intake manifold gasket.

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

and

https://youtu.be/xN5pcM-5bso

Let me know what you find

Best, Ken
Jun 16, 2016 at 8:46 AM
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MATTY22
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We tried that already and couldn't find a leak anywhere.
Jun 16, 2016 at 12:07 PM
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STRAILER
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It could be a problem with an exhaust leak or the sensor itself is bad. it is the second sensor behind the catalytic converter. Do you hear any leaks while the engine is running?
Jun 17, 2016 at 8:35 AM