Question about 1998 Mercury Mountaineer

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Will catalytic converter ruin engine - 1998 Mercury Mountaineer

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I don't see how they can. But they will get so clogged up they shut the engine down.

Posted on May 24, 2015

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  • Mercury Master
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Yes

Posted on May 24, 2015

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1 Answer

I have noticed when imtrying to speed up the car will putt and will flash the check engine light comes on I am not getting good gas mileage


If the check engine light is flashing , that means that a catalytic converter damaging event is happening . You have a misfire . It's time to take your vehicle to the repair shop before you wreck the catalytic converter . A new one can cost up $800.00 .
Best Answer: A flashing MIL, means there is a 'class A' misfire that is present. This type of misfire WILL ruin the catalytic converter(s), if the problem isn't fixed in a timely manner.

May 04, 2016 | 2003 Oldsmobile Alero

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P0420 code in a 2006 Suzuki verona Should I start by changing the downstream 02 sensor in the cat before considering a new cat? I have a leaking front flex pipe would that affect this?


Yes, the leaking flex pipe could cause this code. You need to fix that, clear the code and re test. BUT: This vehicle has had issues with the catalytic converters coming apart and ruining the engine. It can suck catalytic converter pieces into the engine. When the converter is removed, visually inspect for damage.

Sep 04, 2014 | Cars & Trucks

2 Answers

What would be causing what sulfur smelling exhaust smoke?


The Smell is-- Sulfur Dioxide-- from an over heated
Exhaust Converter

Yes-- it will be ruined soon

White Smoke all the time, could be a head gasket

It could also be-- lots of fuel-- that is overheating the converter

Have to look at fuel trim on scan tool data

Aug 23, 2014 | 2012 Ford Fusion S Sedan 2.5L 4-cyl....

1 Answer

Catalytic converter gets red hot


No flashing check engine light? I would say that unburnt fuel is being burnt inside the converter, melting its interior down.
The rough running could come from a misfire from one or more cylinders. The fuel which is not burnt in the engine, will burn off in the converter. Don t continue driving, it will ruin the converter.

Sep 02, 2013 | Jeep Grand Cherokee Cars & Trucks

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Engine is suging real bad. at all speeds.


Mine did the same thing. I thought the fuel filter was clogged, but when I put on a new one, it did not solve the problem. I took it to my mechanic and he instantly knew what it was. He replaced the EGR valve. Fixed it. Also, a bad EGR valve can ruin a catalytic converter so you might want to check that also. I ended up replacing my catalytic converter right after the EGR valve was fixed. Got a catalytic converter that let the exhaust flow free-er. Getting 24 mpg on the highway now.

Feb 14, 2011 | 1995 GMC Jimmy

1 Answer

I have a code that keeps coming up! its "P0420"....... any idea what that is!


Hello: Code 420 is reduced catalytic converter efficiency. The only way to repair is to replace the converter but before you do you need to check the engine and make sure the engine is not running rich or it will ruin the new converter

Jan 08, 2011 | 1997 BMW 328

1 Answer

Can a bad catalytic converter ruin a cylinder?


NO, a cat only cleans up pollutants. It has no effect on engine performance unless you have a misfire and the cat works overtime and melts and cloggs the exhaust system. If your blowing grey smoke out the tailpipe then you indeed may have a bad engine. What I would want to know from the mechanic is what is the compression and why he thinks its a lower engine issue rather than a leaking valve on the head which would be alot less expensive to repair. Then again you could get a second opinion from another shop. Mechanic shops are known for gouging customers wallets, Not that i'm implying anything here.

Jul 31, 2010 | 1995 Toyota Land Cruiser

1 Answer

Flashing check engine light 1999 Subaru


Any time your check engine light is flashing this indicates an engine misfire that has the potential to damage your catalytic conveter. A diagnostic trouble code has been stored in the vehicles onboard computer that will confirm the engine misfire. Continued driving may ruin your very expensive catalytic converter located in your front exhaust pipe.
Good luck, I hope this answers your question.

Mar 27, 2010 | 1999 Subaru Legacy

1 Answer

Catalytic converter is bad on 1995 Subaru Legacy L Wagon


dearship parts are high.you can buy a factory catalytic converter or universal converter cheaper at auto parts place.they basic the same parts the.dealership has same catalytic converter.they put their price and labor rate charge an hour your pocket book will be empty.i have used universal catalytic converter.had no problem with it.the only difference is universal converter body a little shorter.but has same lengh as factory.if check engine is coming on you cant turn it off .if computer showing you a code.you could have a misfire causing rich exhaust emission.that can ruin a catalytic converter have it scan.dealership charge you about $130.00 .you can have it scan at advance auto or auto zone.to see what pcm code is.it could be oxygen sensor somethinh minor.

Jul 12, 2009 | 1995 Subaru Legacy

2 Answers

Catalytic converter shot


3 front coils? Ignition coils? If the engine had a miss for a long time the excess fuel can ruin a catalytic converter.

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