well this my problem with my ralliart 2006 mt

a few days before i start and run my car
its all going good but when the car rreach the 1,500 rpm it makes an strange sound and i was like WTF and specially when it hits 1500 rpm, when the car passes the 1500 rpm the sound just desappear but when it hit it again it just makes the sound, just right when the car gets hot, the sound desappear but the rpm starts falling down like crazy and hits 500 rpm and the car just starts to die but seems that something just keep it running but it continue to getting low rpms and i saw that when i use the car days before the rpm from getting high just return to normal but slow like from 3000 to 700 rpm but it return slow.. it just get to normal but slow like when my car was okey now it just get from 3000- to 500 and very fast and u feel when the car just starts to die but it doesnt and return like 550-600 and keep it on and i feel like lost power..

anyone that can help me?
the only custom thiing is the air filter...
they told me that it sounds like the maf sensor..

thanks to all who help me

 

Yea the MAF is where i would start.
You can also try resetting your computer.
Is it throwing codes?

 

is ur filter still on correctly? cause i remember my old 03 lancer started to idle like crap and i discovered the filter wasn't on correctly anymore, it had popped off a little. after that i was ok again. but idk about that weird sound at 1500rpm.

 

well i was reading about testing the maf sensor
by turning on the engine then unplugging the maf sensor
and if the car just runs perfectly it means that the sensor is failing

but some time in a moment like a week ago the ecu send me a code about a 02 sensor that was failing but then it justs errase it self and it didnt appear any more the code error was P0134 and it says it doesnt detect activity in the circuit sensor of heated oxigen something like that but i didnt put so much attention cuz it errase it self :s

could it be a the maf?

any idea to see if the sensor is bad?
or like testing the sensor?

its like my filter is okey it works fine like for 1 month and then this :s

and i reset the computer like 5 times
and it continue the same :S

 

is your maf sensor piping the wrong size?

 

well it was time back but i correct the problem and worked fine for like a month
cuz i cut the maf tube of an original air box and it works correct
but i post up that like for since a week ago the ecu sent me a code
p0134 about a 02 oxigen sensor that wasnt having activity but i connect it in autozone just to check the code and when they disconnect it the code wassnt on anymore
but i check the wire and its all okey
i am geeting out of ideas

is there any test that i can do to the maf sensor?
and i reset the ecu like 5 times

 

all they did at autozone was erase the code from the sounds of it. i dont think they actually fixed whatever problem you're having.

http://www.obd-codes.com/p0134

 

they told me they didnt errase the code its like they reset it
and the error didnt appear any more
even if i reset ecu

but that code makes me think
were are the o2 sensor located ?

by the way they told me that the problem that i was describing sounds like the maf sensor
could it be?
any test that i can do to make sure that the sensor its okey?

 

find someone with an RA that has a working MAF sensor and switch it out. if it works fine its the sensor... it not... problem is elsewhere

 

its very hard i havent seen any ralliart were i live thats the problem bro
but the error in the o2 sensor tells that the car gets stuterring and dying and thats one of the problems

i just check about in google that u can test the maf sensor just turning on the car and unplugging the sensor and the ecu starts to work with the default values and if it works okey it means that the sensor its bad

could that works? cuz were i live there arent any ralliarts

by the way is there any post or something were the o2 sensors are and try to clean them?

 

we have 2 o2 sensors. one before the cat and one after the cat in the exhaust piping. thats it

 

well heres a vid so u can have an idea of what i am talking about

ignore the music

and the sound i discribe in the post comes from the head and i am little scare
cuz when the sound just starts to hear the engine just starts to get low rpms
and try to die but dunno
just see the rpms

http://www.youtube.com/watch?v=UgL1kDtlND8

 

i think you ought to take it into a dealership.

 

I cant hear it over the music.

 

well right now i know that a cilynder its getting air and that valve its bad
i will check what valves are bad and i will post it

thnkx