Questions tagged [exhaust]
Questions about Exhaust systems, Catalytic Converters and Headers/Manifolds
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Is it possible to test an exhaust system for a restriction without dismantling it?
I've had an overheating problem with a new/other engine (1991) for 3 years now. Some time back I discovered that there was a misfire on cylinder 1 and maybe an intermittent misfire on cylinder 4. I've ...
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Is a snorkel sufficient to ford big puddles?
Hypothetically - if the extreme rains and weather continues, would fitting a snorkel be sufficient to allow my ICE car to ford deeper water (assuming that the road is intact of course). I am ...
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Water spraying from tailpipe?
i have a 2010 honda fit. the other day i was on my lunch break sitting in my car with it running. which i do all the time. about 30 minutes later i hear some sound from the back of my car and i see ...
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Putty for exhaust manifold leak
Having some issues with a small exhaust leak from the exhaust manifold on my campervan. We got it taken to a mechanic to repair the manifold leak but he's ended up just making it worse. I dont have ...
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Will fixing first OBD2 misfire codes resolve the cascade of others downstream?
Looking at a car my kid wants to buy. 2012 Honda Civic LX. One owner, some service records, seemed to run fine in test drive. No colored exhaust gasses, no dashboard lights, sped on freeway, sudden ...
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My Corsa makes a strange noise after 10mins of driving, any suggestions for the cause?
So my 2007 Corsa Sxi 1.6L started making this noise after an audible 'Ping' happened while driving (at low speed, had just started my journey). It has been inspected by my local garage but they ...
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How does CO poisoning still happen with newer cars?
I'm learning about catalytic converters, and learned that a car with a functioning converter doesn't output carbon monoxide (CO) because it converts it into carbon dioxide (CO2) and water (H2O). How ...
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06 Accord Stolen Cat Causes Worse MPGs?
my catalytic converter was stolen. Because of this, my car now smells like gas and gets worse MPGs. I do city driving and now after a mechanic straight piped the car, I get about 23 MPGs as opposed to ...
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Is it possible for a cambelt / plug change to affect the exhaust sound of the exhaust
A mechanic just completed a major service (cambelt tensioner, and plugs) on my 3.5L V6 Montero/Pajero engine.
The vehicle now produces a very different exhaust sound. Before it produced an amazing ...
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What are the consequences for having a mismatched inner diameter for an exhaust system
I’m installing my new exhaust system including Headers 60mm inner diameter at exit, down pipe 60mm inner diameter throughout, front pipe 80mm, and cat back 60mm
My question is…
I’m I going to regret ...
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Exhaust rusting
I just purchased a 2023 nissan frontier pro 4x new back in the end of December. I live in the northeast, so I know rust will happen on the exhaust and muffler quickly. This just seems a bit excessive ...
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Is an exhaust pipe broken at engine connection fixable by a DIYer?
I took my 1999 GMC Sierra 1500 w/5.3l to a transmission shop to have it replaced. The process requires disconnecting the exhaust pipes going into the engine to get access to the transmission. When the ...
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Leaks along exhaust system?
My car recently failed its inspection in Massachusetts. The mechanic told me that there are small leaks all along the exhaust system. They want to do something called a cat back replacement from the ...
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Chimneysweeping exhaust pipe for performance
Hypothetically, I was wondering if chimneysweeping exhaust pipe, if I have easy access to entry points, as in maybe the catalytic converter manifold taken out, would improve the engine performance as ...
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Wires from exhaust
Driving down the road today and i hear a snap, then lost all acceleration, these four wires wrapped in a casing were ripped out after wrapping around the axel, they are attached to part of the exhaust ...
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P0420 In Honda Civic or any other car
Just want to know about P0420 code in any car and specially in Honda.
Does that mean only that catalytic convertor is bad or any other reason too?
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Chevy Silverado muffler and/or exhaust is rattling
2018 Silverado here. Over the winter I noticed a prominent rattling coming from somewhere underneath the vehicle that was made worse whenever I am stopped but in drive. For example, its the absolute ...
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Run car with exhaust hole without O2 sensor?
I tried starting my car yesterday but it struggled to start and ran really rough like it was struggling to get any fuel. It's not a fuel problem cause I could smell the rich mixture been output from ...
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1990 Suburban exhaust system replacement
I recently purchased a 1990 Suburban - and it has a Chevy 350. The exhaust merges and exits on the left side.
I am unable to locate a replacement which is a direct fit. Also, almost all y-pipes online ...
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Why is my exhaust leaking antifreeze?
I have a 2001 Honda Accord and I just noticed what appears to be antifreeze dripping from a part of the exhaust system. I did not see any leaks around the radiator. I'm not even really sure what the ...
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Car exhaust spraying water (Honda Fit)
I have a question which isn't quite answered in any of the previous posts I looked through on water and exhausts.
I went to look at a 2011 Honda Jazz/Fit today as a possible used car purchase. I was ...
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Why have I had to replace so many exhaust pipes?
My largest car maintenance cost is exhaust pipes, mostly catalytic converters. I do not think this is the case for most people. What am I doing wrong?
I tend to buy cheap cars (<£500), change the ...
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ECU shielding/ Highway driving
Ok, two qs I was wondering about (completely unrelated):
How are ECUs and electronics shielded from all the heat that a car generates, especially when the car is driven in hotter climates (i.e Middle ...
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would you use a cheap 70 amp stick welder for an exhaust pipe?
I've never welded before but how hard can it be right. You cut the old pipe out, go down to AutoZone and get yourself a new pipe and some adapters, tac it in place and then weld it all together. Easy, ...
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Car exhaust smoking (white smoke) a lot when driving
I have a bmw e60 with low mileage, I had an overdue service that I got done at garage, they advised that I have sludge/soot in the oil judging by inspection of oil filter.as I drove it home alot of ...
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A/C dripping water onto exhaust
I have a Chevelle 1970 w/ 427
The A/C drips water onto exhaust pipes up close to the engine.
Will that harm pipes when Hot??
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Does anyone the location of the serial numbers for 2004 CARB Subaru Outback Catalytic Converters?
I replaced most of my exhaust system a few years ago (catalytic converters and O2 Sensors) because of a P0420 error. My car came from a state that required the vehicles to meet strict emissions ...
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Why do Tri-Y Headers give more low end torque and struggle at top and why 4-1 Headers give better top end torque?
Everywhere i read says Tri-Y is better for bottom end and that the 4-1 is better for top end. Why exactly is that? I thought Tri-Y would have more top end "breathing" and make more torque at ...
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How should I remove this corroded nut without rounding it?
I have a 1982 Porsche 911 and need to remove the heat exchanger on one side. It's held on with three 13mm nuts and 3 barrel nuts. The barrel nuts were no problem, but two of the 13mm nuts are so ...
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Odourless, invisible fumes in cabin
I have a deisel 2012 Volvo C30. Previously, I could smell fumes coming into the cabin and I got it fixed.
I cannot smell anything but I am still concerned I might be getting fumes inside because if I ...
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I had my exhaust replaced and my engine started humming then seized
a while ago I decided to fix my whole exhaust from the headers to the tailpipes. After looking I spent around 2 grand on parts alone ( I made sure they fit) originally I was gonna replace the exhaust ...
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Painting a Front Catalytic Converter — Bad Idea or Not?
I need to replace the front catalytic converter on my 2006 Suzuki Aerio. The part came in bare metal, no paint or any coating is visible or possible to feel on the surface.
Should I not paint it to ...
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Replaced my 5 cylinder Volvo V70 2.5l turbo engine with a 6 cylinder S80 2.9l twin turbo engine and I'm having trouble with the exhaust
Replaced my 5 cylinder Volvo V70 2.5l turbo engine with a 6 cylinder S80 2.9l twin turbo engine and I'm having trouble with what to do about the exhaust.
The original 5 cylinder had only 1 turbo, 1 ...
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ECU tuning exhaust - why?
When a sports exhaust is fitted to a car apparently a re-tune of the ECU is required. For a simple example consider a regular unmodified normally aspirated petrol car which then has a sports exhaust ...
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Is my exhaust causing misfire or did misfire burn the exhaust?
I hope to not be too vague as I don't know a lot about cars.
I recently purchased a 1.2L Fiat Punto II 2005. It has trouble with a rough idle, a power drop off around 4krpm when accelerating and a ...
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Can exhaust backpressure cause a car to cut out?
Car cuts out sometimes immediately sometimes after 30 seconds etc.
If I hold the key on the starter position engine keeps running and stays on.
I know this can be caused by a faulty ignition switch.
...
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what should I replace resonator with?
Civic coupe vti 99.
resonator keeps
Getting hit by road humps as car is low. I want to stop this. Entire exhaust does not need to be changed as pipe diameter doesn’t hit but resonator only does.
I ...
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Can damaged sports exhaust lead to reduction in sound factor?
Assume you have a sports exhaust which sounds awesome but suddenly starts to quiter or less awesome.
there are no air intake, engine or exhaust leak problems.
Could any other factors cause it to ...
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Exhaust vibrations/noise
I have had for some time some exhaust noise/vibrations, and decided to buy a new exhaust. However when I checked the exhaust I couldn't find any holes or any bad rubber holders. I decided to not ...
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Do I need to replace my catalytic converter or it could be exhaust leak?
I have WV Polo 1.2 petrol from late 2005 with 170k. Recently I got the check engine light and I went to non official repair service (since there isn't one in my country). They told me it's the oxygen ...
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Can exhaust system hangers make a car sound significantly different?
Civic coupe vti 1999.
I previously had an accident after where my low suspension car fell to the ground at low speed when a wheel nut cane off.
After this the car didn’t sound as vibrant and peppy as ...
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Emission High CO and High Lambda
It fails at 2500rpm only with CO 0.5~0.6 and Lambda 1.04~1.05.
How can it possible be that emission fails because of HIGH CO, and HIGH lambda reading... It means that engine runs rich and lean at the ...
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Long term engine issues by using Active Exhaust?
Looking to install OEM active valve mufflers on my 2019 Mustang EcoBoost.
Wondering if the valves opening and closing, thus changing exhaust back-pressure would cause the engine to run lean/rich and ...
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Car consuming oil, leaving soot on ground
I have a 2010 Hyundai i30cw. It's the FD, 2.0L Petrol Engine variant, Automatic Transmission.
Around five or six months ago I took it to the dealer for a service - they didn't call out any issues, but ...
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How to design an exhaust pipe to increase scavenging at specific RPMs
Good day all.
I'm looking for advice on an exhaust design problem. It is easy to find videos explaining exhaust scavenging, but how do you control it? Surely there must be some physics that can be ...
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Just changed catalytic converter and getting P0171 and P0430 codes
Vehicle is a 2004 Mercury Monterey, V6. Over the winter the injectors were replaced, and all 4 O2 sensors. It failed a state inspection, because the catalytic converter had been damaged, presumably ...
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Will replacing spark plugs fix this? [closed]
My husband and I purchased a 2011 Mazda 6 2-3 months ago. It had 71,000 mi on it when purchased.
One accident, but only cosmetic.
A few weeks after driving it, I noticed some jerking when coming from ...
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2007 Honda Fit Sport P0420
I backed up in a dirt lot and heard a metal scraping sound. After driving about 30 miles, the check-engine light came on with code P0420 indicating "Catalyst Efficiency Below Threshold (Bank 1)&...
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2014 Passat sounds louder than before
I have a 2014 VW Passat 2.5L I bought it used last year. It was super quiet and great to drive when i bought it. It has close to 80000 km on it. The past few months I had i sitting in the garage not ...
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Protecting the Mating Surface between the Catalytic Converter and Header
In the midst of replacing my Catalytic Converter on my 03 Nissan 350z, I have taken off the Catalytic Converter to reveal a pretty rusty mating surface between the two components. My question is what ...
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