Question about 1996 Chevrolet Cavalier

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Catylitic converter changed the coils, changed the plugs cat.converter still getting red

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  • irene8912 Sep 14, 2008

    the only code is the random/multiple cylinder misfire detected. Note changed plugs, and coils and went to a higher octane fuel and catalytic converter is still glowing red

  • steve1648 May 18, 2009

    1996 cav. replaced converter same problem. idles rough ,no dead cylenders, no cods, plugs all look gray to white in color



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Without a doubt, a plugged converter or your engine is still running rich. Any CEL Codes?

Posted on Sep 14, 2008


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1992 geo prizm start but won't run we have changed the fuel filter fuel pump distributor cap and rotary button coil pack battery and alternator plugs and wires the catalytic converter was glowing red

Sounds like the cat or muffler is plugged. If there is an 02 senor ahead of the cat or muffler take it out and see if the car will start, it will run rough but if it starts one of them is plugged and it most likely is the catalytic converter in the exhaust system.

Apr 19, 2017 | Geo Prizm Cars & Trucks

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1993 Gmc Jimmy starts and sounds ok but began to buck and jumpl Changed plougs and wires with no change. Catylitic converter is making noise at the outlet

looks that your catalytic converter is broken.Before you do anything take it to a qualified mechanic and request for emission test to see whether you do have high emission due to lambda sensor failure or cat. also you can check from your exhaust end if your emissions smell like rotten eggs.If so change cat.

Sep 10, 2012 | 1993 GMC Jimmy

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2003 ford ranger catylitic converter glowing red

if cat is glowing red it is most likely plugged. will need to replace cat.

Aug 30, 2012 | Cars & Trucks

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The catalytic lock down and the car keep heating

Not much information has been given by you but judging by what you have said the catylitic converter is plug therefore you will have to change it there is no other way to get around it. If the catvlitic converter is plugged it will cause the vehicle to heat up drastically. If it heats up too much it can cause severe engine damage. The best way to tell if it is plugged is to wait untill it gets dark outside and start your vehicle within about 2 minutes the catylitic converter will start to glow red hot. If this happens it is plugged and will have to be replaced.Do not let it run like this too long it will cause damage.

May 04, 2011 | Chevrolet Impala Cars & Trucks

1 Answer

Car engine is running rough sounds like a miss the what I believe is a catylitic converter connected to the exhaust manifold on the drivers side gets glowing red I was told this is do to it being clogged...

Yes it is true, I believe there are 4 cats on that car. burn the correct fuel in it and it will run better and not clog your cats, that car takes premium gas.

Jan 31, 2011 | 1991 Lexus LS 400

1 Answer

Ive flushed my coolant system changed the water pump and timing belt, new thermostat and im still overheating cool air is blowing from my vents and temperature continues to climb in my '98 Honda Passport...

If it is your cat.,Look at it when the motor is hot.
The cat. will be red hot(literally)
depending on the mileage and type of water in the cooling system
The radiator could be partially,have it checked at a radiator shop
If it is cloged it will cost about 85.00 to have it rodded out.
Before that,do a bubble test to check for a pinhole in your head gasket
(low pressure in at the plug,look for bubbles in the top of radiator.

Nov 27, 2010 | 1998 Honda Passport

1 Answer

2001 buick regal w/ bad ignition coil and clogged catylitic conv.

Hello! The defective ignition coil more than likely contaminated the downstream O2 sensor...If there isn't a trouble code and engine performs in a normal fashion, there's no reason to change the upstream sensor...


Aug 03, 2010 | 2001 Buick Regal

1 Answer

Out of no where the car started to sounded like it was choking at a steady pace. The check engine light came on diagnosing misfire in multiple/random cylinders. After a short drive, the catylitic converter...

Its rich. You need to measure fuel pressure, and find out why its so rich. This will need to be fixed before you replace the converter. Its time to get a repair shop involved.

Jan 17, 2010 | 2004 Oldsmobile Alero

1 Answer

02 grand prix 3.8 engine will not go above 3500-3600 rpm. if i try to drive it it barely can get out of first gear because that is the shift point. when it does go into second it will only get up to about...

two things i can think of, 1) a restricked catylitic converter. 2) faulty fuel pump or injectors. check your fuel pressure a the fuel rail to test the pump. a plugged cat. will cause back pressure in the exhaust, if the car is good and warmed up ( at night or very dark place ) look at the "Y" pipe attached to the exhaust manifold, if it glows a dull cherry red replace the converter.

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2 Answers

New catalytic converter gets red hot

clogged , check the rest of your exhaust after cat to see if it gets hot

you can buy a no contact thermometer for less than $55.00

but the shop that installed the cat should have that

good luck

Jun 03, 2009 | 1989 Isuzu Trooper

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