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Car stumbles at anything passed idle

Tiny
WITTE2
  • MEMBER
  • 2005 DODGE NEON
  • 2.0L
  • 4 CYL
  • 2WD
  • MANUAL
  • 123,545 MILES
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.
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Tuesday, July 24th, 2018 AT 4:06 PM

5 Replies

Tiny
WITTE2
  • MEMBER
  • 4 POSTS
Found an exhaust leak at the collector and manifold, tightening up to cure that issue. Will update once that is completed.
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Thursday, July 26th, 2018 AT 10:38 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,940 POSTS
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

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Friday, July 27th, 2018 AT 11:24 AM
Tiny
WITTE2
  • MEMBER
  • 4 POSTS
Will do, thank you for the advice.
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Friday, July 27th, 2018 AT 11:52 AM
Tiny
WITTE2
  • MEMBER
  • 4 POSTS
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.
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Saturday, July 28th, 2018 AT 11:20 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,940 POSTS
Nice work, we are here to help, please use 2CarPros anytime.

Cheers, Ken
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Sunday, July 29th, 2018 AT 11:03 AM

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