Car stumbles at anything passed idle

2005 DODGE NEON
123,545 MILES • 2.0L • 4 CYL • 2WD • MANUAL
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WITTE2
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Motor swapped out, car ran great for a week, now the car stumbles upon acceleration. car will not go above 2000 RPM, fuel pump as been replaced, TPS has been swapped with a known working one. No codes, no CEL, really confused about the issue, any help would be greatly appreciated.

Watched TPS with scan tool, went from 0.7 volts to 3.8v without issue. also performed CAM/Crank resync/relearn.

Just swapped spark plug coil as well with known good, same issue.

Also to add new spark plugs and GAP @ .044, new air filter, new plug wires, and new battery.
Jul 24, 2018 at 4:06 PM
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WITTE2
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Found an exhaust leak at the collector and manifold, tightening up to cure that issue. Will update once that is completed.
Jul 26, 2018 at 10:38 AM
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STRAILER
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It sounds like the catalytic converter is plugged to confirm the issue please run down this guide and report back.

https://www.2carpros.com/articles/how-to-test-a-catalytic-converter

This guide can help as well.

https://www.2carpros.com/articles/engine-has-low-power-output

Please run down these guides and report back.

Cheers, Ken


Jul 27, 2018 at 11:24 AM
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WITTE2
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Will do, thank you for the advice.
Jul 27, 2018 at 11:52 AM
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WITTE2
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Ken, awesome conclusion, it was a clogged catalytic converter. I always forget about those things and the problems that they cause. Thank you so much for the direction. It was greatly appreciated.
Jul 28, 2018 at 11:20 AM
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STRAILER
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Nice work, we are here to help, please use 2CarPros anytime.

Cheers, Ken
Jul 29, 2018 at 11:03 AM