Question about Chevrolet Blazer

1 Answer

The cat converter on my 2002 chev blazer is shot will operating it cause other problems eg gas mileage? how do i size a replacement?

Posted by on

  • brianckelly Jun 05, 2010

    sp0t on..well done

  • brianckelly Jun 05, 2010

    sp0t on..well done



1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert whose answer got voted for 500 times.

  • Master
  • 1,033 Answers

It will cause a slight gas mileage difference, not much. The smell of gas is the problem, if it can't hold in the emissions then it's like riding behind a older car with that strong gas smell. It will eventually give you a check engine light which is not a worry, this is because the converter can't do it's job, so then the O2 sensors will not function correctly. They do make a universal replacement and should be installed at a local muffler shop. If money is a issue, then I would drive the car like it is, it will not hurt or cause the car to stall. The only thing to worry about is one getting stopped up causing back pressure to the engine.

Posted on Jun 04, 2010


1 Suggested Answer

  • 2 Answers

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

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.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


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



Related Questions:

4 Answers

If I cut the Cat converter off my 2004 trail blazer well it still run

Yes it will still run. But running w/o a cat is illegal. And you will fail any emissions test. Also you will lose gas mileage. Hope this helps, James Booth

May 17, 2011 | 2004 Chevrolet TrailBlazer

1 Answer

Catalytic Converter 2002 Sonata Replace catalytic

if vehicle has less than 200,000 kms then i think cat is ok ,check the O2 sensors with a automotive meter rather than reading the obdii ,which i cannot do anyway in europe but at least you will know if they work or not their are two O2 sensors on each cat one before the and one after ,unless this is a high mileage vehicle i dont think the cats will be gone

Apr 11, 2011 | Hyundai Motor 2002 Sonata

2 Answers


the more cloged it get the harder it is to get the ehaust away from the motor, the gas milage and smell under load are as bad as it should get

Jun 05, 2010 | 2002 Chevrolet Blazer

1 Answer

2002 blazer zr2 check engine light code is po155 bank 2 sensor 2 where is it and how do I check it

P0155 is o2 sensor heater circuit malfunction bank 2 sensor 1 it is the o2 sensor circuit in front of the cat converter the o2 sensors are located mounted to the exhaust pipe in front and behind the catylic converter the problem is in the circuit [wiring or sensor itself] check wiring and repair if necessary if the short or open circuit is the sensor need to replace sensor +++ P0161 is 02 sensor heater circuit malfunction BANK 2 SENSOR 2 ++++++ this is the sensor behind the cat converter

Feb 23, 2010 | 2002 Chevrolet Blazer

3 Answers

I believe I ran out of gas - I emptied a gas can I had in the garage - car will not start. What if gas was old? What can I do know - probably has 3 gls of stale gas in it. Tks.

well it sounds to me like a emgency shut off like for eg.. i have a 2002 explorer and i ran out of gas and mine did the same thing as yours no start. on mine there is a little button you have to push down on the passenger side it is the fuel pump emg shut off i is for when you run out your pump does not fry it,s self. so read your manual or ask the chev dealer if you have sutch a thing on your blazer. give it a shot , good luck!

Dec 08, 2009 | 2001 GMC Jimmy

1 Answer

1991 chevy s-10 bazer sucks to much gas and into the exhaust

I had a similar problem with gas smell and bad gas mileage. The problem was: a gasket that goes around the carburetor covering the jets had worn out allowing gas to pour out and burn off the hot engine. The gasket cost less than $1 to replace. When properly mounted, the gasket stopped the gas leak, which stopped the gas smell meriting an exponential improvement with my gas mileage.

May 10, 2009 | 1991 Chevrolet S-10 Blazer

1 Answer

2002 chevy blazer fuel consumption

Usually when it comes to bad gas mileage, an air filter change, fresh oil and filter, fuel filter and making sure you have no vacuum leaks....

Also, believe it or not, improper tire pressure will affect your gas mileage.

New spark plugs and wires are a "nicety" but if there is not damage to them, then they will be fine.

Mar 30, 2009 | 2002 Chevrolet Blazer

1 Answer

Dash board all lit up on 1999 Chev. Blazer

check for short circuts in the dash and make sure the surpentine belt is on the pulleys

Oct 27, 2008 | 1999 Chevrolet Blazer

1 Answer

Catalytic converter

i replaced my cat with a high flow cat and flowmaster 40 series exhaust about 4 years ago now. good set up on my 2.2L 4cyl 5spd. sounds excellent. the only problem, since it is a high flow cat and free flowing exhaust, there is little if any back pressure, and so i really dont have that much torque anymore. it actually made my truck slower on the bottom end. not that the 2.2L is a speed demon. lol. you could probably get away with a test pipe that is still the same size as the stock pipe and it will sound gread. as far as gas mileage, i doubt it will do anything to help. my exhaust didnt help my gas mileage any. the only thing ive noticed that got me more mileage is replacing the stock air filter with a drop in K&N filter. i got about 5 more miles a gallon just by doing that. good luck.

Jul 07, 2008 | 1994 Chevrolet S-10

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

22 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts


Level 3 Expert

76649 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22219 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8522 Answers

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

Answer questions

Manuals & User Guides