☰
GET A QUOTE

[Exhaust](/topics-exhaust-chevy/) leak right before the [...


[Exhaust](/topics-exhaust-chevy/) leak right before the [muffler](/topics-muffler-chevy/). P0420 code, but ran fine for a while. Started misfiring intermittently, but no code for a while until last night P0300. Rough idle. Mec...

[Exhaust](/topics-exhaust-chevy/) leak right before the [muffler](/topics-muffler-chevy/). P0420 code, but ran fine for a while. Started misfiring intermittently, but no code for a while until last night P0300. Rough idle. Mechanic's Assistant: Have you seen the misfire code before? Has the car been stalling? No, first time with the code, but it has been misfiring for about a week. No stalling. Mechanic's Assistant: What is the make/model/year of your car? 2006 chevy suburban 3/4 ton 6.0L Mechanic's Assistant: Are you fixing your vehicle yourself? What have you tried so far? I tried two bottles of Lucas fuel injector cleaner. Mechanic's Assistant: Anything else you want the Mechanic to know before I connect you? Recent [engine](/topics-engine-chevy/) work: new cam shaft, [head gaskets](/topics-head-gasket-chevy/), plugs and wires.

Read More

Responses

Automotive Expert
Hello, my name is \*\*\*\*\* \*\*\*\*\* I will be happy to assist you with this running problem. The P0420 code indicates a problem with the catalytic convertor. I see where you had some engine work done, but if the convertor has over 100,000 miles on it, it is probably starting to go bad and that may be what is causing your general misfire code (P0300).

What would the exhaust leak fluid look like if the cat was bad?
Automotive Expert
It would be like black water coming out of the bleed hole in either the cat or the muffler. The exhaust would also start smelling like sulfur or rotten eggs, especially when during hard acceleration.

Hmm, not sure about the smell, smells normal to me.

Customer attachment 1/3/2021 6:42:15 PM

This is the leak, and the fluid dripping is clear.
Automotive Expert
That's your exhaust leak for sure. That clamps needs to be either tightened or replaced. Spray some penetrating oil on the clamp bolt and let it set for about an hour before you try to tighten it, or that bolt may break. There's a lot of rust there.

Yea, I yanked on that bolt for a good half hour and it didn't budge. I don't have any penetrating oil on me (I'm traveling), but wd40 didn't seem to help.
Automotive Expert
WD40 is not a penetrate. You need something like PB'laster or Knock'er Loose. You can buy those at any auto parts store, or even any WalMart.

Ahh ok gotcha. Oriellys is open down the street. There's an o ring in there too, correct?
Automotive Expert
No, there is not.

Ok cool, so it's just that clamp.

Customer attachment 1/3/2021 7:02:31 PM

Will this work as a replacement?
Automotive Expert
As long as it fits the pipe and can be tightened it should.

Ok great. Thanks so much for your help, James! Road trip fun!
Automotive Expert
You are most welcome. It has been my pleasure. If you need anything else, please let me know through this chat box and I will do my best to assist you. I wish you well. Have fun on your road trip, and thank you for using JustAnswer.

Still not sure what you need?

Have a certified mobile mechanic diagnose what's wrong with your car, at your home or office.

Get a Diagnostic

Top Questions

Trending Topics

What others are asking

How does semi-automatic climate control work?
If your vehicle is equipped with automatic climate control, you can switch the system to semi-automatic operation if you want. This gives you more control over certain aspects of the system, but it means that it won’t be completely automatic....
Read more
I smell something burning and my oil pressure light is on. What's wrong?
This sounds like you are having three different problems: The engine had burned oil and you changed it and now the oil light is on (https://www.yourmechanic.com/article/is-it-safe-to-drive-with-the-oil-light-on). The transmission slips (https://www.yourmechanic.com/article/3-essential-things-to-know-about-your-car-s-gear-shifter) and then catches. The last thing you mention the cooling...
Read more
A/C blows only hot air
Hello. This can be a module, but it can also be an issue within the system (https://www.yourmechanic.com/article/4-essential-things-you-should-know-about-the-heating-and-air-conditioning-system-in-your-car). I typically check the system pressures first. If the pressures are fine and are functioning right then the actuators under the dash need...
Read more
Car noise, dashboard warnings on
One guess is that the problem could be a faulty wheel bearing(s). Bad wheel bearings (https://www.yourmechanic.com/services/wheel-bearings-replacement) often result in a rotational growling noise. The wheel bearing is integral to the hub assembly on your vehicle, which also houses the reluctor...
Read more
Car stalled while driving, now won't restart.
Hi there, thanks for writing in. I'd be happy to offer my insight. Judging by the mileage and age of the car, I would suspect the car has been sitting for a length of time. With that being said, I...
Read more
Check engine light and fuel cap stay on.
Hi there: In most newer trucks, like your 2014 Ram, if an error light is triggered and the repairs are made, you'll have to clear those stored error codes in the ECU with a digital scanner or they will stay...
Read more
I got 2 codes P0304 and p0102
Hi there: The OBD-II trouble code P-0304 (https://www.yourmechanic.com/article/p0303-obd-ii-trouble-code-cylinder-3-misfire-detected-by-spencer-clayton) indicates that cylinder four is misfiring or having ignition issues. The most common causes include a faulty spark plug, clogged fuel injectors, or even an intake valve leak. To know for certain,...
Read more
Is a transistor and a blower motor resistor the same thing?
When you were told to replace the resistor or the transistor the person that told you did not know if you had manual or automatic a/c. Your car will have a blower resistor for manual a/c blower controls and a...
Read more
What are the symptoms of VSA light on in 2009 Honda Accord EXL 2.4 liter?
Hi There, The VSA light indicates that something may be wrong with your Vehicle Stability Assist (VSA) system, otherwise known as your traction control system. The traction control system uses wheel speed sensors at each of the wheels, which monitor...
Read more

Browse other content

Cars
Maintenance
Services
Estimates