Mazda - Mazda6 :: 2004 - Burning Oil Smell And Sluggish Acceleration

Car Details : 2004 Mazda 6 V6 3.0 L engine automatic transmission with 88,000 miles

Car Problem Vignette : After driving for a bit, say 20-30 mins (after my engine gets hot), I start to smell a burning oil smell. I’ve looked under the hood at my engine and do notice some oil leaking from the engine. This is not just some simple oil leaking after an oil change. The oil appears to be coming out of the engine "seams" itself. This has persisted for some time now. This problem started at least a year and a half ago now (12/05/12). I’ve had a mechanic take a look at the oil leak and supposedly he fixed the head gasket or valve cover gasket (I’m not sure which one), but the problem never fully resolved.

In a related or unrelated situation (I’m not sure yet if it is related) during this time my car started to jerk and sputter when I drove, so much so that I wasn’t sure it was going to make it to work one morning. The check engine light came on and I eventually made it to work and back home that day. It gave me a code that said one of my cylinders was misfiring. I proceeded to change all of my spark plugs to no avail. I then changed out one of my ignition coils to the bad cylinder misfire. It fixed my problems with the stuttering and I could drive my car again without fear of stalling. However, I still smelled burning oil. Over time I eventually started to feel my car struggle to take off during acceleration which felt different from when my car seemed like it was going to jerk and sputter to a stall. During this time frame one day I was at a stop light and when I went to take off, a huge plume of bluish / white smoke came out the exhaust and I smoke-screened the people behind me. After that incident, I ended up changing my positive crankcase valve (PCV). After changing my PCV my car felt like brand-new again! I could not believe it! My car started accelerating smoothly and driving so much better. I felt like I had gotten the “Zoom Zoom” back for my Mazda.

Sadly this didn’t last long, maybe a month at the most. My car started struggling during acceleration again and I started smelling burning oil again. I have dealt with this for over a year now. My car still runs and gets me around, but I can’t remember the last time that my car ran smoothly or didn’t smell like burning oil except for that time I changed the PCV. I have never seen any kind of smoke coming out of my exhaust again like that one experience.

Problems:

•Burning oil smell coming from my engine due to leaking oil coming out the "seams" of the engine
•Car is struggling when accelerating especially at lower gears
•I feel it every so often when I accelerate somewhere between 2nd and 3rd gear that the car jerks and makes this “chunk” type sound and feeling when it shifts gears.

Questions:What is wrong with my car? Are all these situations related? And what do I need to do to stop the oil leak and acceleration problem?

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The Prius was actually beeping. Then I powered off it. I smelled a strong smell of burning plastic. I looked the front, the coolant for ICE was ok. but the coolant for the hybrid system was gone. The window wash tank was fine but the right head light was gone.

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When I got home, I popped the hood and smelled the scent of burning electronics. The smell was strongest over to the right of the hybrid system, but it didn't seem to be coming from the hybrid system. The smell was definitely not as strong to the left side of the hybrid system. I checked the fuse box (fusible link box no. 1) and didn't find any fuses blown.

My dad (an electrical engineer) came over and checked it out. At first he thought a wire may have shorted under the hood, but we looked and couldn't find any melted insulation, char marks, or the like. I jacked the car up and looked from beneath; again, nothing. The smell did linger for a while though, and was quite noticeable even the next day after having the hood shut overnight.

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Prius (2004-09) :: At 65 MPH All Dashboard Lights Lit For A Second And Then Died With Burning Smell

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Yesterday my husband was driving at 65 MPH when all the lights on the dash all lit up for a second before the entire car died. The car was DEAD, wouldn't do anything except the lights worked (I'm assuming cause it's the starter battery). Ran hazards for approx an hour waiting on tow truck but the rear left light only flashed approx 1 in 10 times compared with the rear right light. Car had a terrible burned smell.

1.5 hours later the tow truck shows up and says "your car smells terrible". We towed it to Toyota Dealership.

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So today I actually popped the hood to investigate and found a small tuff of smoke coming from the back of the engine.

After climbing underneath I found a leak of some sort of brown/cream fluid.. Kinda scary color. Anyways it seems when put a significant load on the car going up a hill it sprays this fluid on the exhaust, thus the burning smell..

Oil is clean on the stick and under the cap.

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Prius (2010-12) :: Burning Rubber Smell After Climbing A Moderate Hill At 40kph / 25mph

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I searched all around using a small flashlight and couldn't see anything touching the exhaust, but it's difficult to see anything under a Prius with it's low ground clearance. The burning rubber smell was strongest under the car, but was getting pulled into the HVAC system when we stopped. I have smelled it before, but passed it off as other vehicles. After tonight, i'm sure its coming from my car. I drove the car home for 50 minutes through stop and go city traffic, so the engine was not always running. After parking, I checked under the car again and the smell was very light almost non-existent.

I have 13000km/8000mi on the car, and I have had it for 11months. It has been driven in hills and very hot weather last summer, so I don't think this is paint burning off or the car getting hot for the first time.

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Today my wife was driving and came to an intersection at a red light to make a right-hand turn. She braked coming into the turn and as she made the turn. What happened next scared her and is very concerning to us -

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In the end, dealer was able to replicate/experience the harshness problem, but was unable to come to a confident solution. My 86xxx VIN V8 Treg was not due/eligible for the much discussed tranny flash (my engine type was right, but the tranny flash was not listed for my car). In fact there were no recalls or campaigns due for my car, and there were no faults on the computer.

The dealer stated the cause as "Harsh shifting patterns". and fixed via "Reset TPS and TRANS". Essentially, I was told, let the adaptive driving feature relearn, and hopefully replace the previous harsh shifting pattern. My ride home from dealer was short, so not sure if there was any effect - but I'm not confident.

2004 V8 Silver Touareg [Nav system, Sound II, Bi-xenon, Convenience Package, Parking Assist] VIN 86xxx

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