Problem

three

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Mazda 3
I was driving down the street just kinda cruising and my 3 just starts stutering and back firing jolting the whole car back and forth making this funky kinda sweet smell and it will only do this when its in gear just kinda barely accelerating. Any idea whats causing it.

Im gonna take it to the dealer tomorow and see if theyl do anything but I already know that their gonna say that because I have done all that stuff to my car that they cant even test it. They always refuse to even look at my car. I think that it is a lemon but people say there is nothing i can do because i have put intake exhaust and header on it. What should i do?
 
You have a check engine light? If so did it come on right after you put the header on ? Are you catless ? It sounds to me that the car is going uber pig rich for some reason.
 
Yup. Not enough info here to get a good picture. Other problem, cant troubleshoot over the net. Point in directions yes, tell exactly whats wrong, no. (in most cases :D ) I would take off all the aftermarket stuff and put it back to stock if your worried about warranty stuff.
 
The check engine light has been on since about 3 days before I put the intake on and kinda went off and on for a few months and the dealership told me that there was a recall and to take it in and they would fix it. When i got the car back from the dealer everything was fine for a day or so then it came on for good but it wasnt acting up. Since then I put on the header catback exhaust and highflow cat and still didnt have any problems and didnt think anything of the cel because someone had told me that the cel is just a part of modding your car. It has been running with the cel for about 6 months now and no problem until just tonight. Could my head gasket possibly be blown would probably explain the smell. The car is fine when i get on it but bogs reall bad when im just kinda lightly cruising keeping it under 4 grand. It did this once about 6 months ago and started acting fine after about a day or so of crappyness. Ive had this problem twice before and the dealer just shoos me off and sais stop modding but ive tried putting all the stock stuff back on my car for about a month or so and never stopped screwing up so now the service department is gonna hear about it.
 
I just checked the plugs and they are black as black can be so that means its running uber rich right. If so that means O2 sensor????

Oh well its my fault I mean Im the one that wanted a header. I guess Ill just hafta do a 3.0L V-6 engine swap from the mazda 6.
 
The dealer hooked it up to their computer and said that the O2 sensors are bad and also pointed out that the O2 sensor on the draxas header is put in a bad place because it is only reading one cylinder I dont know if that will cause a problem but could it possibly be.
 
Damn man, id get in contact with draxas and see if they will trade you out for their revised header... Doesnt seem like good buisness to have people with a draxas header sitting in their garage because it caused problems...
 
The O2 sensors were bad and the thermostat is bad. They did it all under warrantee so im cool. All I have to do is move the first O2 sensor to a position before the cat that can read all four cylinders because on the header the O2 sensor is in only one of the four little pipes before it goes into one and the O2 sensor is thinking that the one cylinder it is reading is actually all four cylinders.
 

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