Question about 1995 Buick Regal

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Its either a clogged CAT or MAS sensor

I'm installing sensor first before I replace the Cat! I've done evrything so I saved the most expensive parts for last! The Cat is about $385 and the sensor is $350 new You can get it elsewhere cheaper! After this i'm keeping it until i fix it! I've replaced everything its almost a new car!

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  • Michael Prince Jul 17, 2009

    I have the same problem with the cranking but won't start! I have changed everything from the ign module to the fuel pump, cmptr analized pass key and ign not toggling! Its either a clogged Cat or the MAS sensor on the throttle body!

  • Michael Prince Jul 17, 2009

    car will sometimes just cut off at 55mph and will not start right away! chk eng light comes on and then goes off I have changed the fuel pump, ign module, starter and still does it especailly to my wife. It must be either the MAS or a clooged Cat can't figire it out cmptr scan picked up PASS KEY failure and ign module not toggling I'm so deep into this car for parts when I do get it right I'm keeping it!

  • Mike Butler
    Mike Butler May 11, 2010

    What's the problem description? Little history would be good, maybe we can help.



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Posted on Jul 16, 2009


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1 Answer

2002 Ford Escape XLS 3.0L 4WD Firewall side Catalytic gets TOO HOT and melts insides?

Replace all of the ignition coils. You will pay about $450 in parts. That will fix your problem. It fixed mine.

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Low or no power, changed the mass air flow sensor? OBD showed a problem on left side cat converter? Runs good one day and bad the next. Problem started after hurricane. Acts like exhaust is plugged ...

If its showing a catalytic converter code,,dont keep replacing other sensors..Has nothing at all to do with the map or the mass air flow sensor...Likely its the cat is clogged..That code tells you that your cat is not doing its job..I would change that cat on that side,,and quit letting the mechanic throw parts on the car..Thats to expensive

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I just bought a 1997 volvo s90. It runs great, except the check engine light is on and I took it in and was told that I needed a new catalytic converter and two oxygen sensors. Where can I buy these parts...

If the cat is bad, it will have to be replaced-and aftermarket cats are much less expensive. Since you say the car runs well, however, I would question why they feel it needs to be replaced. A cat can get 'plugged' from constantly trying to remove unburned hydrocarbons from a poorly running engine, causing a bad problem to become worse. Yours is not the case-although they want you to replace the front O2 sensor, which will improve how the car runs,especially if it is the original O2 sensor.

I would replace the Sensor in front of the cat, clear codes, and go from there-does your cat get cherry red when the car has been driven for an extended period of time? If not, it should not be a issue. The O2 sensor behind the cat only monitors catalytic converter function, and will not affect how the engine runs, period. I

If you have doubts I think you might get another opinion, from a local non-dealership since you got bad advise from that dealership. I would think they would replace the old front sensor, clear codes, and see if any come back-if the car is running well, they will conclude the cat is not bad (it is not) and they might suggest replacing the rear sensor since it too can may not effectively be properly monitoring the cat efficency anymore. You do not need a dealer to install Os sensor(s), and a name brand sensor will work just as well as an OEM sensor, and cost much less in most cases.

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I bought a 2003 cat converter from NAPA(Part No.16403). My mechanic was unable to put the old heat shield back on. I am again seeing the "check engine soon" message on my instrument panel. ...

A 2003 vehicle probably did not need a new converter. Cat converters have to be run for years before they clog up. Depending on what kind of vehicle this is, you may have a post catalytic oxygen sensor problem. Also, depending on the vehicle, you can not just replace the converter with any old converter. Many vehicles require an OEM replacement converter in order for the sensors to work properly and these are expensive. Kansas City Converters (available online) sells replacement converters for a fraction of the price that will work with post catalytic sensors and not cause the check engine light to come on.

Dec 14, 2010 | Nissan Altima Cars & Trucks

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2001 toyota sienna, 6cyl 3l, must accelerate very slowly from stop or van seems to bog down badly, may take 2 miles to get to 55 mph, going up bridges it bogs down very badly, diagnostics indicated...

Brake loose connection between cat and exhaust manifold , it will allow exhaust gas to go out before cat , and see if it's restore the power on the engine.
If it does then your cat is clogged.
If not it's also might be Throttle Position Sensor , or Mass Air Flow Sensor.
You can't remove cat , you have to replace it if it's bad. Cat is a part of Emission control system.

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Orange 'engine' light is on. Am told it needs catalytic converter(& sensor). Will it hurt anything to drive it as it is w/o fixing?

It will hurt your fuel economy,performance and the environment.

When the catalytic converter is completely clogged. The body of the cat. will glow red hot and melt the surround material.

Example: interior carpet.

Don't for the distinctive sulfur smell.

In short, you should replace the catalytic converter as soon as possible.

Please rate my answer if it's help to you.



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RX8 Melting Cat , Missfire

1 of 4 coils you have, dont keep doing this cos now you need a new cat as well as the coils to buy get the coils first tho'

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I need to replace cat convert on 97 vw jetta

sounds right they are expensive shops dont make a lot on the installs.

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