Question about 1998 Nissan Maxima

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Engine surging , won't accelerate over 3000 rpm ! IS chocking is like is not enogh gas

As I said the engine is idling perfect but being in park won;t accelerate over 3000 rpm ! Is shaking is coughing but will start normally will idle perfect even when is cold or hot! I suspect the MAF sensor or catalytic converter clogged I was wondering if is any easy way to check to catt.Could be also a MAP sensor? engine bucks an feels like its going tostall when accelerating

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You can get the cat tested at any muffler shop for excessive back pressure, there is no easy way for u to check it other than disconnecting the exhaust pipes at the engine exhaust manifolds. Have u replaced the fuel filter? this sounds like a low fuel pressure issue from a partially blocked filter, if the MAF were defective it would fall flat on its face when you hit the gas, u can test the MAF by just disconnecting the wiring connector to it, if the engine runs ok wit the sensor disconnected then the sensor is defective, the computer control system (PCM) has software that works around a disconnected sensor but not a malfunctioning one.

Posted on Apr 20, 2009

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Posted on Jan 02, 2017

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