Question about 1999 Mazda MX-5 Miata

2 Answers

I want to remove the catalytic converter. How do you remove it without a check engine light coming on?

Posted by on

2 Answers

  • Level 1:

    An expert who has achieved level 1.

    MVP:

    An expert that got 5 achievements.

    Governor:

    An expert whose answer got voted for 20 times.

    Scholar:

    An expert who has written 20 answers of more than 400 characters.

  • Contributor
  • 36 Answers

You cannot bypass the catalytic converter and expect the car to run properly and the check engine light to remain off. When you go to replace the cat, DO NOT attempt to use an aftermarket brand. Even many of the "OEM" aftermarket converters do not have sufficient back pressure and within 2 months they are ruined. I know, I have replaced mine that was purchased at Advance Auto Parts three times in the last six months! Shell out the money for an original Mazda converter. List is about $736.50, but you can find a dealer in Virginia that discounts them 20% down to $589.08. Just remember, the car's computer is programmed to read the O2 sensors' data and adjust accoringly. A new Mazda cat will allow your car to run like it did when it came off the assembly line, everything else equal.

Posted on Aug 14, 2009

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 1,056 Answers

Remove it with engine off, and don't turn the engine on while its removed.

Posted on Jun 30, 2009

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

  • 740 Answers

SOURCE: 2001 Toyota Corolla Check Engine Light

You cannot guess with these cars,these vehicles have a lot of sensors and actuators can can go bad at anytime, here is my suggestion take your vehicle and to Auto_zone and have them check the codes, they will be able to tell you what they mean. ITS FREE.. then get back to me if you need more help.

Posted on Dec 23, 2008

landsend
  • 1066 Answers

SOURCE: engine light keeps coming on, had catalytic converter replaced 2x

a bad or disconnected oxygen sensor will make the engine run rich.
How about a clogged air filter? 

Posted on Mar 27, 2009

daves944
  • 1050 Answers

SOURCE: Check engine light due to Catalytic converter

Without knowing the specific code, I will assume it relates to an inefficient catalytic converter. At this mileage it could very well mean that the catalytic converter is failing to do it's job and needs to be replaced. The computer sets this code when it sees a signal from the rear O2 sensor start to change in time with the front O2 sensor. It should not. If the cat is working, The rear O2 sensor should have a stable output as the cat is supposed to be removing all the oxygen from the exhaust. Sometimes this code will set if the spark plugs or the engine's state of tune has deteriorated and is producing more emission than the cat can handle, the rear O2 sees the overflow and assumes the cat is bad.
At your present mileage, I would strongly suggest changing the spark plugs if they have not been done in the last 20,000 mi. Have the light reset and drive it to see if the code returns. If it does, replace the catalytic converter. I suspect that you do need a cat, but I view the spark plugs as maintenance, and I wouldn't want to put a brand new cat in without the assurance that my old plugs were not going to damage the new one.
Hope this helps,
Dave

Posted on May 19, 2009

  • 1 Answer

SOURCE: Check engine,2000 Nissan Maxima

same things happens on me. $500 more on replace senor, $1000 more on bank2, now $1500 on bank1.
F*ck damned Nissan car. The solution is never ever buy a nissan car

Posted on Oct 31, 2009

  • 1 Answer

SOURCE: catalytic converter check engine light 2001 s60 volvo

usually if you start to hear a rumble, and by rumble i mean it sounds like a bunch of pieces of metal are clanking around in your exhaust then the catalytic converter needs to be repaired. It could also be the oxygen sensor which is located on top of the converter. Volvo did an interesting job of having them sit on top of each other.

Posted on Nov 20, 2009

Testimonial: "thank you for your answer, it has been very helpful"

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Driving with check engine light can it cause a problem after removing cartalic converter?


The "Check Engine Light" is just a light. An indication of something else being wrong. It's that thing that's wrong that can cause you a problem, or not... It depends what turned it on. They are mostly for emissions, i.e. pollution controls for the engine. LOL! Like pulling off your catalytic converter. So, the light won't hurt your engine, but what made the light come on in the 1st place could, depending on what that is/was. P.S. You can't get inspected without the CAT on there.

Sep 20, 2013 | 2002 Mazda Tribute

1 Answer

I have Service engine light on for my nissan 2001 maxima. Dealer ran the diagnostics and said Bad o2 Sensor. Today , the Service engine light is gone.. Do I need to replace the part anyway or wait for the...


if it comes back, yes you will need. without pre o2 sensor your car wont idle, it will use lots of fuel and you will face drivability problems if it is post o2 sensor, it is there to check if catalytic converter is ok or not(it won caue drivability problems but may consume little more fuel to run rich and to save catalytic converter). if sensor is broken you need to replace it. if you have error for post o2 sensor but it is ok, this means your catalytic converter is going bad.

Nov 18, 2011 | Cars & Trucks

1 Answer

How do you delete catalytic converters on 2006 dodge ram 5.7 hemi without getting the check engine light


it is not legal to remove or bypass the catalytic converters.the converters do not restrict the exhaust flow to any degree because of how they are now designed and the material used in them to control emissions, if the converter is causing the light to come on then they need replacing but this should be checked out.

Mar 04, 2011 | 2006 Dodge Ram 1500

1 Answer

What will happen if a person removes the catalytic converter from a 2002 Chevrolet Malibu and does not replace it.


You will cause problems with the engine management system. The engine will not perform as it should without the converter installed. The system is calibrated for a converter. Besides it is illegal to remove a catalytic converter and not replace it. It is a Federal Crime that comes with a hefty fine to do so. You also could not sell the car without being held liable and you are polluting the atmosphere. Do not remove the converter.

Sep 21, 2010 | 2002 Chevrolet Malibu

1 Answer

Do I have to keep the Catalytic Converter on my s90 or can it be removed....will it damage anything. What does the air pump do and will it damage other parts of the car when not working?


It is a federal law that you must keep the catalytic converter on punishable with a hefty fine. It's actually even illegal to replace the catalytic converter if it's still in working order. With that said, if you remove the converter it will set a p0420 or p0430 code putting the check engine light on steady. The air pump... pumps air into the catalytic converters causing them to heat up earlier then they would without the extra air, allowing them to start "cleaning" the exhaust sooner then they would otherwise.

Jun 08, 2010 | 1998 Volvo S90

1 Answer

Exhaust issue


Most likely the heat shield has corroded off and is just sitting on top of the muffler or Catalytic converter. Regardless you can remove the shield and still run the the Xterra without any problems, the OEM muffler came with a heat shield as to the after market mufflers don't have one. The Catalytic converter also has a shield and you can remove it also as the Xterra has a heat shield on the floor board it self. Most exhaust shop if honest will tell you to just remove the rattling shield if there is no exhaust leaks or no Check engine light on that monitor's the Catalytic converter's performance.
A muffler shop if shady may advise you to replace the Catalytic converter and that can go for up to and beyond $400.00, so as long as there is no leaks or check engine light on. Go right ahead and remove the rattling shield.
Thank you for using Fixya

Mar 25, 2010 | 2002 Nissan Xterra

1 Answer

Catalytic converter check engine light 2001 s60 volvo


usually if you start to hear a rumble, and by rumble i mean it sounds like a bunch of pieces of metal are clanking around in your exhaust then the catalytic converter needs to be repaired. It could also be the oxygen sensor which is located on top of the converter. Volvo did an interesting job of having them sit on top of each other.

May 27, 2009 | 2001 Volvo S60

1 Answer

Check engine light due to Catalytic converter


Without knowing the specific code, I will assume it relates to an inefficient catalytic converter. At this mileage it could very well mean that the catalytic converter is failing to do it's job and needs to be replaced. The computer sets this code when it sees a signal from the rear O2 sensor start to change in time with the front O2 sensor. It should not. If the cat is working, The rear O2 sensor should have a stable output as the cat is supposed to be removing all the oxygen from the exhaust. Sometimes this code will set if the spark plugs or the engine's state of tune has deteriorated and is producing more emission than the cat can handle, the rear O2 sees the overflow and assumes the cat is bad.
At your present mileage, I would strongly suggest changing the spark plugs if they have not been done in the last 20,000 mi. Have the light reset and drive it to see if the code returns. If it does, replace the catalytic converter. I suspect that you do need a cat, but I view the spark plugs as maintenance, and I wouldn't want to put a brand new cat in without the assurance that my old plugs were not going to damage the new one.
Hope this helps,
Dave

May 18, 2009 | 1996 Isuzu Trooper

1 Answer

Engine light keeps coming on, had catalytic converter replaced 2x


a bad or disconnected oxygen sensor will make the engine run rich.
How about a clogged air filter? 

Mar 27, 2009 | 2001 Honda Odyssey

Not finding what you are looking for?
1999 Mazda MX-5 Miata Logo

1,248 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mazda Experts

yadayada
yadayada

Level 3 Expert

75822 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8210 Answers

Are you a Mazda Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...