Cat question

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WongFeiHung
Posts: 341
Joined: Sun Mar 16, 2003 7:25 pm

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Can a bad catalytic converter effect idling or cause stumbling?

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Q45tech
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Posts: 14296
Joined: Tue Apr 30, 2002 3:19 am
Car: 1990 Q45 342,400 miles 22 years ownership with original engine
1995 G20t 5 speed 334,000 miles 16" 2002 wheels - 205/50/16 Sr20ve vvl

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Sure it can if partially melted. Measure the exhaust backpressure at cruise and WOT high rpm.
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NISTECH
Posts: 10585
Joined: Sun May 25, 2003 4:17 am

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very rarely does a cat failure effect idle. when it melts down you generally have lack of power on accel.
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