Questions tagged [exhaust]

Questions about Exhaust systems, Catalytic Converters and Headers/Manifolds

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29 views

Can an x pipe be placed directly in front of the muffler?

Curious to know if there are any exhaust flow studies to see if a two in and single out muffler will work with an x pipe. If you were to place an x pipe 2" from the two port inlet exhaust would it be ...
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46 views

Diagnosing rattling noise whilst car under acceleration

I have a 2008MY Fiat Grande Punto (6 speed manual transmission), which has developed what I would describe as a rattling noise during acceleration. A few observations I have made: The noise sounds ...
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1answer
50 views

Check engine light, p0420 error and o2 sensor voltages

Good Evening, Some time ago I bought a used KIA ceed 2009. I've checked it with a mechanic who found it clean. The car was stationary for a long time and with little gasoline in the tank. I changed ...
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1answer
66 views

EXHAUST MANIFOLDS

I would like to clean up my rusty cast iron exhaust manifolds. What is the best coating to use after they have been throughly cleaned, ceramic coating, powder coating, or heat resistence paint to ...
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42 views

Are my cats bad? — secondary O2 sensor voltage

I have a 2002 BMW M3, and I've been trying to track down a poor fuel economy issue for quite some time now. My long term fuel trims are high (+7%-10%), and when I had the car on the dyno a couple ...
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2answers
53 views

How long does it take to trigger a CEL due to exhaust leaks?

tl;dr; If I have an exhaust leak that is sufficiently small such that upon the engine heating up the leak was reduced or removed to a satisfactory level to avoid seeing a Check Engine Light (CEL); how ...
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1answer
121 views

What is the name of the socket that fits this type of stud?

I'm trying to replace the exhaust manifold on my 2010 Chevrolet Equinox (2.4L 4-cylinder), and there are studs which connect the catalytic converter to the exhaust manifold. I cannot, for the life of ...
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1answer
58 views

Trying to explain plume of black smoke after a car sat in the garage for a few days

I drive Toyota Highlander 2005. It's a gasoline car. I filled up the tank a few days before this happened (right before Halloween.) It then sat in my garage for about 3 days. (I live in the WA sate ...
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1answer
117 views

Is it normal for decat car to smell bad?

civic vti 1999. Car has decat and smells bad and toxic. I’m a sensitive individual so probably worse for me than others. There are no bad smells like egg smells however when near exhaust it just ...
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3answers
3k views

What does exhaust smell on oil and transmission dipstick mean?

I was inspecting a used car and the oil and the transmission dipstick smelled of exhaust (carbon monoxide?). What does this mean? Does it mean that the engine's gone bad and I should stay away from ...
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1answer
22 views

Exhaust rebuild '03 Buell Firebolt XB9R

I am starting a project on my Buell and was thinking about using copper for the exhaust pipes. I think I'll like the patina, however I haven't seen copper exhaust pipes so ... On paper the copper ...
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1answer
39 views

Could I have a blown head gasket or something else?

My 2004 Ford Tarus all of a sudden overheated multiple times in one day. Then I noticed minimal white smoke and excessive water out of the tailpipe while at idle. The white smoke stopped but not the ...
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1answer
61 views

Water droplets from exhaust donut gasket?

Is this is a problem ? There's sometimes water droplets under the donut gasket on cold startup along with a brief smell of damp exhaust. The gasket, springs etc.. are OEM new & the mating ...
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2001 Camry P1135 Cause

Sorry in advance for the long post. My check engine light in my 2001 Camry 4cyl recently came on with code P1135. Google shows that this is usually a faulty sensor. However, I noticed on some posts ...
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2answers
84 views

Painting exhaust on motorcycle

I recently purchase an 07 Honda shadow spirit and it has chrome exhaust, could anyone tell me how I could paint them black, thank you
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White smoke from exhaust after brake job

I attempted (and failed) to replace my master cylinder and brake booster. I ended up putting a lot of brake fluid into my new booster before I realized it. (In fact, in an attempt to determine the ...
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1answer
28 views

What is difference whether the silencer has got one or two exhaust pipes?

My 1999 Opel Vectra B has got one exhaust pipe at the silencer. Now I have to exchange it and see models with one either two exhaust pipes. What's the difference?
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1answer
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1994 Chevy 1500 loss of power slow acceleration what could this be

Chevy having slow acceleration when driving I was told it could be my catalytic converter could it be fixed by replacing with new exhaust system
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43 views

White exhaust fumes

On a hot/humid morning, my brand new 2019 Kia Sorento emits white smoke on startup. After driving for about 3 minutes it goes away. Is that normal?
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BMW i3 Range-Extended REx exhaust pipe? But where?

I have a similar puzzle regarding: the BMW i3 Range-Extended REx exhaust pipe, where is it? See also, https://www.mybmwi3.com/forum/viewtopic.php?t=197 BMW i3 is an electric car, so the exterior ...
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4answers
141 views

Why do worn diesels emit black smoke?

I have often noticed that on the road, whenever a heavy diesel accelerates, it emits a huge cloud of black smoke. If this happens in front of me, I put the air recirculation mode on. This typically ...
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2answers
211 views

Are these bolts welded on to my 2007 Ford Taurus catalytic converter

I've got a failed flex pipe on my Taurus, and I'm having some trouble removing it for repair. The flex pipe is part of the rear catalytic converter assembly, and it's held on by two bolts at the ...
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1answer
404 views

Loud humming noise from the back of the car when idle

Last year, after driving a long distance (about 200km), my 2013 Kia Cee'd started making a high pitch humming noise. It was loud when I was stopped but completely drown out by the engine noise as when ...
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Can I use a CCTA catalytic converter on a CBFA engine if I live in Georgia?

VW CC 2010 2.0L Turbo (Sport) CBFA SULEV My car is a special variant of the normal VW CCs where instead of the CCTA engine I have the CBFA engine which basically means it has 2 catalytic converters ...
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1answer
28 views

Smoking from motorcycle exhaust, the crossbar?

I've been smelling a burning oil my motorcycle, a 81 Suzuki gs450l. If I sit long enough at a light it can smoke. I finally spend some time gave her a bath and proceeded to let run in neutral long ...
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42 views

Did muffler shop install wrong size flex pipe?

2003 Camry 2.4L. Noticeable vibration after the repair especially at idle with ac on and in reverse with foot on brake. They said bad motor mounts became noticeable after the repair. So I installed ...
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2answers
719 views

does straight piping your car remove catalytic converters?

I have a 2014 dodge charger hemi r/t. I'm looking to make it louder and i was just concerned about the cats being removed if I straight pipe it.
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Will an evap canister leak make the same noise as a cracked exhaust?

Video of driving recorded with iPhone SE(5). 2002 Honda Accord, parked outdoors New England, 214,000 miles Regular oil changes 1 owner before me, I got it around 150,000 great service records. Tran ...
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1answer
213 views

Difference between banks for AFR & O2 sensor values

This is a well maintained 2007 Subaru with 140k km on the 3.0 litre six cylinder EZ30R engine. She's running a little scratchy most noticeable when cruising although no codes or anything. I decided ...
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4answers
5k views

Is it possible for a vehicle to be manufactured without a catalytic converter?

Can a new vehicle from a plant be produced without a catalytic converter? Is it possible? I am a lecturer at a college in Zimbabwe, and my students recently asked this question, so I am researching.
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4answers
446 views

Is it possible for an oxygen sensor spacer to cause a car to stall?

VW CC 2010 2.0L CBFA I installed an O2 sensor spacer on my downstream O2 sensor and it seemed to be working for a day. One day later, after the car had cooled down it would rough idle and stall when i ...
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49 views

Where are the O2 Sensors in a VW with 3 sensors?

My VW CC 2010 2.0L Sport CBFA has three oxygen sensors and two catalytic converters. The CCTA version has 2 oxygen sensors and one catalytic converter. Since the engine is in a transverse 4 ...
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2answers
105 views

How many catalytic converters does a VW CC 2010 2.0L Sport have?

I have a P0420 code on my VW CC 2010 and I've narrowed it down to a faulty catalytic converter. I have edited this photo to try and explain easier. In the red circle is the catalytic converter I ...
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2answers
505 views

Thin white smoke after getting gas and fuel system cleaning

First time posting, have no car knowledge. We filled my wife's 2017 Dodge Durango up at a new gas station, shortly after that we noticed sluggish acceleration and trouble going off stops. We took it ...
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3answers
713 views

Sheared off exhasut pipe: How to fix without a welder?

The exhaust pipe on my 2005 Malibu has sheared off and is causing excessive noise. I would like to temporarily repair the pipe in order to reduce the noise that is being caused by the broken pipe. ...
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1answer
54 views

Is it unsafe to drive with a leak in exhaust box center silencer?

I have a 5mm in diameter hole/leak in my exhaust center silencer box. The part seem to be wearing with other tiny leaks developing. I plan to sell the car in 6 months at the latest. The center ...
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2answers
96 views

What is the best TurboCharger dump Pipe Length for a turbodiesel engine? [closed]

What is the best length for Turbocharger Dump Pipe. I have a Force Gurkha with a 2.6 litre diesel engine. I removed the second CAT Converter and Muffler from the exhaust. So now it has a CAT and then ...
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156 views

NOx sensor location - 5.2L 4HK1

So we have a 2011 Isuzu NPR-hd that is giving us a few codes, one for the NOx sensor and one for the glow plug. NOx code is: P2201, glow plug code is: P0672 (cylinder 2). My question is, since there ...
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1answer
45 views

Is there a way to connect a 51mm silencer to a 23mm downpipe

I have a tgb r 125x can't find full sport exhaust or down pipe,wondering if it is possible to weld a 51mm slip on silencer if I cut silencer off one piece exhaust and reuse down pipe which is only ...
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109 views

Would a hole in the catalytic converter cause code p0420?

VW CC 2010. Catalytic converter was replaced when I first got the car at 78k miles. It is now at 83k miles. Downstream oxygen sensor was replaced at 80k miles. There is a small leak in the catalytic ...
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1answer
38 views

2014 HARLEY ULTRA EXHAUST UPGRADES

I'm helping a buddy. He has a 2014 Harley Ultra Classic with a high output 103. It has 23k miles, Vance & Hines Short Slashes, Vance & Hines Heavy Sucker air filter, and Vance & Hines Fuel ...
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1answer
105 views

Exhaust back box detached - Peugeot 207 1.4 2008

yesterday the back box of my Peugeot got detached. I have attached a photo of it. I have a couple questions. Does it look like I need a new centre exhaust pipe? Is there any chance to claim money ...
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1answer
97 views

Cracked Flex Pipe Repair for 2007 Chevy HHR

Background: I've been told by my (non-dealer) auto mechanic that I have a crack in the flex pipe that is connected to the exhaust manifold. Problem: Said mechanic claims that an after-market kit ...
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0answers
28 views

Can Super Charger performance gains be limited by a stock exhaust?

Edit: As suggested by Rory Alsop in the comments, I believe this question is not a duplicate of: Performance Exhaust -- what, how, why? & Exhaust Backpressure and Its Impact on LTFT Values I ...
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1answer
110 views

Exhaust smell after transmission replacement

Backstory: I took my car in for a transmission fluid change and the mechanic damaged my car. The engine light was on it was stuck in third gear and not driveable. I am not sure what happened I took it ...
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1answer
16 views

Exhaust 98 Ford Expedition

I need a complete exhaust system. Someone gave me 1. Not sure that it will fit my truck. How can I find out? It also includes a catylic converter. Mine currently has a hole in it. How do I find out if ...
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2answers
239 views

Patching a hole in a dirt bike exhaust

I have a 1974 Honda Xl125 exhaust pipe which has a crack in it. I attempted to weld the crack, creating a hole accidentally. How should I properly patch the hole? Here is a link to a photo for ...
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3answers
862 views

Can I bend an exhaust flex pipe?

My exhaust pipe in my 2007 maxima has a crack about an inch outside of a flex pipe, and the repair cost is more than the car is worth to me. The 2 pipes are totally separate, but right next to each ...
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3answers
75 views

white smoke from exhaust

I have white smoke coming from the tailpipe has a burnt plastic smell the engine is not smoking and the car is not overheating. The car runs and sounds fine. the car set up for the past 6 months. the ...
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1answer
54 views

Is it ok to use a used manifold and downpipe?

car is civic vti 99. Need to change manifold and down pipe due to leaks. Aftermarket parts for this car are expensive so I was wondering if should get used parts from a breakers. When I suggested ...

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