Question about 1994 GMC Safari

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Catalytic converter does having a bad catalytic converter cause the engine to function like it is being suppressed?what would the effects be if i cut off the converter and replace it with a normal muffler or resonator?

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  • Anonymous Mar 22, 2014

    Will it cause the engine to idle rough. And at times it will almost stall. And then it smells like there is eggs being smashed, And now I can't get it to pass inspection.



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If you remove it it may not pass an emitions test for a car inspection depending on were you live

Posted on Oct 22, 2008

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If it is bad it will make run like its suppressed. you can use a piece of to replace it wont change the sound . if you do take it off dont throw away take to scrap yard its worth about $40

Posted on Oct 22, 2008


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I have a 2002 Dodge Stratus 3.0, when accelerating the engine chugs and engine light flashes. I heard it's a bad catalytic converter, is this true?

A plugged converter will cause a NO power situation where the vehicle is unable to expell exhaust gasses and cause poor acceleration. A flashing engine light is the result of a misfire. ( spark plug/coil/injector/wiring ). The engine should still be able to accelerate but will have a noticeable hesitation while doing so

Jul 09, 2015 | Dodge Cars & Trucks

1 Answer

Car starts and then immediately shuts off

When you say "bad smell in the air" can you describe it? A rotten smell odor is usually associated with a bad catalytic converter.

Has it been losing power, slowing going up hills, or anything noticeable?

It may be a bad or clogged catalytic converter. Check the oil level in the vehicle. Overfilling can have adverse effects on the catalytic converter and cause premature failure..

Mar 30, 2014 | 2010 Acura MDX

1 Answer

Catalytic converter overheat

A rich fuel mixture will cause the catalytic converter to run hot. A plugged catalytic converter will cause the engine to run poor but not overheat normally

Aug 18, 2013 | Cars & Trucks

1 Answer

P0420 engine code

P0420 is a catalytic converter inefficiency code. The most likely problem is the catalytic converter is no longer able to function. The cat is monitored by the downstream O2 sensor. Unless there was a leak near that sensor than its unlikely (but not impossible) that an exhaust manifold leak is causing the problem.

What is possible is that the leaking exhaust manifold is skewing the readings for the upstream O2 sensors which could effect the life of the cat if the vehicle is running slightly richer than it should be.

Feb 24, 2012 | 2003 Hyundai Santa Fe

1 Answer

Once my car heats up it cuts off ?

Sorry that you're having such an annoying problem with your vehicle. I have some questions for you. Is the "Check Engine" light on? What size is the motor? 2.5L 4 cylinder or 3.5L 6 cylinder?How many miles does the vehicle currently have? And; Does the car lose power? The reason that I ask is because for the issue that your vehicle has can be caused by several different things. It can be one thing causing the problem or a variety of things causing the problem. I do know that the 2.5L engines did have some problems with the "Pre-Cat" which is a catalytic converter located at the exhaust manifold. Its main function is to help the engine heat up faster as well as help in filtering any pollutants before they get to the main catalytic converter. If that "Pre-Cat" were to get clogged, it could cause some smoke due to oil consumption and it could cause stalling and overheating if it was bad enough. It could also be the main Cat as well which would cause the same things if bad enough. If they aren't the problem then the vehicle may have a fuel or spark issues... But I would first check the exhaust. Hope this helps. Good Luck.

Nov 27, 2011 | 2005 Nissan Altima

2 Answers

Dodge dakota engine code p0420 is on whats the problem

There is not cut and dry answer for this code, here is a list of the possible reasons in order of how common they are.
P0420 - Catalyst System Efficiency Below Threshold (in plain English this means the Catalytic Converter is likely worn out and not cleaning up the exhaust stream) A note about aftermarket Cats, they often don't measure up to the system parameters and trigger the same code again.
Here is the whole list of possibilities:
Possible causes - Three way catalyst converter Bank 1 most cars only have one catalyst monitor, it located after the main cat converter in the exhaust pipe, it looks like an O2 sensor but performs a different function.
- Exhaust pipe leaks up stream of the cat.
- Intake manifold vacuum leaks
- Fuel injectors may be faulty (to rich)
- Fuel injector leaks
- Spark plugs may be faulty
- Improper ignition timing
- Engine Control Module (ECM) (very unlikely)

Sep 28, 2011 | Cars & Trucks

1 Answer

Put accelerator down and you go nowhere,has no power at all.

is the check engine light on ! its possible that the convertor is plugged up. if it is plugged the engine will be very sluggish. A converter that is damaged can cause the engine to not function properly. For example, the engine struggles when going up inclines, it hesitates when you try to accelerate or you experience a noticeable drop in fuel economy. If a tank of gas is not taking you as far as it used to, then it may be time to have the catalytic converter looked at. does it smell like rotten eggs. if so the convertor needs attention. Diagnose any and all diagnostic trouble codes before replacing a catalytic converter to preserve and enhance its performance and effectiveness.

Sep 26, 2011 | 1988 Mitsubishi Mirage

1 Answer

2003 ford focus catalytic converter location

SECTION 309-00: Exhaust System 2003 Focus Workshop Manual DESCRIPTION AND OPERATION Procedure revision date: 01/24/2003 Exhaust System adobe.gif Printable View (214 KB) Vehicles with 2.0L Zetec-E enginee0008758.gif
Item Part Number Description 1 - Bracket 2 - Gasket 3 - Catalytic converter 4 - Bracket 5 - Gasket 6 - Front muffler 7 - Rear muffler 8 - Hanger 9 - Flexible pipe

Vehicles with 2.0L SPI enginee0010349.gif
Item Part Number Description 1 - Gasket 2 - Catalytic converter 3 - Bracket 4 - Gasket 5 - Front muffler 6 - Rear muffler 7 - Hanger 8 - Bracket 9 - Flexible pipe

Vehicles with 2.3L PZEV Enginea0072697.gif
Item Part Number Description 1 5G232 Catalytic converter 2 5K222 Mounting bracket 3 5K282 Head shield 4 9451 Gasket 5 5A262 Insulator 6 5E292 Converter and muffler assembly 7 9448 Gasket 8 5G203 Flex Pipe NOTE: The exhaust systems shown in this section are production systems.
The exhaust systems are of a two-piece construction for production and five-piece construction for service.
Catalytic Converter
The catalytic converter fitted to the Focus range resembles a small muffler. Because of the high temperatures at which the catalytic converter operates, the vehicle body areas around the catalytic converter are protected by heat shields. The catalytic converter controls three emissions; Hydro carbons (HC), carbon monoxide (CO) and oxides of nitrogen (NOx).
Catalyst deactivation due to poisoning
Sulphur (S) in the fuel can cause deactivation of the catalyst.
Lead (Pb) in fuel can cause a severe deactivation at levels above 5 mg per liter of fuel. It is therefore essential that vehicles with catalytic converters always operate on unleaded fuel.
Zinc (Zn) and phosphorus (P) present in some oils, can cause deactivation if oil consumption is high.
The effect of sulphur is felt most if it is released from the catalytic converter as hydrogen sulphide (H2S). This has an unpleasant odor similar to rotten eggs. Changing the fuel manufacturer may help in reducing this phenomena.
To minimize H2S emissions, it is essential that the idle CO level is within specification and that the engine emission system is functioning correctly. For additional information, refer to Section 303-08A or Section 303-08B.
ani_caut.gif CAUTION: If temperatures exceeding 900°C are achieved the catalyst substrates will start to deteriorate. It is important that the cause is defined and rectified if subsequent melts are to be prevented.
Catalyst melts are normally accompanied by loss of power due to excessive back pressure. For additional information, refer to Section 303-07A or Section 303-07B.
High substrate temperatures are caused by the ignition or the fuel systems. For additional information, refer to Section 303-07A or Section 303-07B.
Misfires at high engine speed may result in an almost instantaneous melt.


Mar 07, 2011 | 2003 Ford Focus

1 Answer

How do you know if your cat converter is going bad? Can you test for it?

There are two ways a converter can fail:
  • It can become clogged.
  • It can become poisoned.
There really is no "inspection port" for the consumer or mechanic to see an actual clog in a converter. Often, the only way to tell if a catalytic converter is malfunctioning (plugged) is to remove it and check the change in engine performance. When a clogged converter is suspected, some mechanics temporarily remove the O2 sensor from the exhaust pipe ahead of the catalytic converter and look for a change in performance.
A catalytic converter relies on receiving the proper mix of exhaust gases at the proper temperature. Any additives or malfunctions that cause the mixture or the temperature of the exhaust gases to change reduce the effectiveness and life of the catalytic converter. Leaded gasoline and the over-use of certain fuel additives can shorten the life of a catalytic converter.
A catalytic converter can also fail because of:
  • Bad exhaust valves on the engine
  • Fouled plugs causing unburned fuel to overheat the converter
­Sometimes you can tell that a converter is clogged because you don't go any faster when you push the gas pedal. Also, there usually is a noticeable drop in gas mileage associated with a clogged catalytic converter. A partially clogged converter often acts like an engine governor, limiting the actual RPMs to a fast idle. A totally clogged converter causes the engine to quit after a few minutes because of all the increased exhaust back pressure.
The catalytic converter, like the rest of the emissions system, typically has a warranty length that exceeds the term of the warranty for the rest of a typical U.S. automobile.
Here is a safety reminder: Do not park your car over tall grass or piles of dry leaves. Your car's perfectly running catalytic converter gets very hot -- enough to start fires! You can keep it running well by keeping the ignition system in top shape, to prevent any unburnt fuel from entering the catalytic converter.

Dec 11, 2010 | 1989 Dodge Dakota 2WD

3 Answers

My Dodge Dakota won't go above 30 miles an hour and acts like it is going to stop running when the gas tank gets below half full

may have a weak fuel pump, same happened on my dakota, was the fuel pump ,also change fuel filter same time

Dec 06, 2009 | 1995 Dodge Dakota

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