Question about 1998 Chevrolet Cavalier

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How do you know if the catalytic converter on 1996 Grand marquis is plugged? I get a surging when I take my foot off the gas. Acceleration is slow. Shifting between second and third is delayed. Trans was rebuilt last year.

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Well sounds like a fuel issue,pump or regulator. But to check the cat, simply drill a small hole,like the would fit a 1/4" npt fitting & use a regulor vaccuum/pressure guage to read it. Should be less than 1lb. of pressure at idle. 1.5 or more than there's a problem.

Posted on Jun 23, 2009

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Why does a 94 v-8 limited vehicle have acceleration surges.this happens with acceleration or with brake applied just after using accelerator.this does not happen at idle or in neutral. why does this h


Surges are usually from dirty throttle body's, idle air control motors, or airfilters. I would clean or replace these first. Other things could be O2 sensors, or bad catalytic converters.

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Jan 03, 2013 | 1997 Mercury Grand Marquis

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I have a 96 Mercury Grand Marquis. The car lurches while driving feeling like it will conk out. Usually when going uphill on the highway and trying to accelerate or maintain speed. This does not happen all...


I have a 96 Grand Marquis with a similar problem. Also on the highway it would just conk out on me suddenly, almost felt like I was hitting the brakes, then it would pick up again. Eventually got to the point where it was stalling out on the highway and at red lights. One day it wouldn't start. Mechanic said the fuel filter was clogged solid. It has run well but every once in awhile still stalls out on me. From talking with other Grand Marquis owners and the mechanic the Mass Air Flow sensor may be to blame. He wanted to charge me $400 but I found the part online for about $85.

Mar 27, 2011 | 1996 Mercury Grand Marquis

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WHERE IS THE OXYGEN CENSOR ON A 1997 GRAND MARQUIS


O2 sensors are located in the exhaust manifold near the Catalytic converter.
Some cars have the 02 sensor before the catalytic converter, some behind, and some before and after.

Simply locate the "bung" that contains the O2 sensor, and you will see the sensor connected to wires.
This is the best way to locate them.

-Jackson
http://urbanscooters.com/

Oct 11, 2010 | 1997 Mercury Grand Marquis

1 Answer

Where are the catalytic converters located on a 1996 mercury grand marquis?


The catalytic converters are located in the exhaust system, just after the engine, and prior to the muffler. Usually around the seating area. What kinds of problems are you having with them?

Aug 08, 2010 | Mercury Grand Marquis Cars & Trucks

1 Answer

Acceleration problem


Brought to dealership and they replaced catalytic converter.

Jun 18, 2009 | 2003 Chevrolet Monte Carlo

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