what can cause my stock d16a6 motor to stumbles during acceleration? i looked up in my hyanes manual book and it said it either these reason, spark plugs could be fouled which is new already installed last summer, something with fuel injection system needed to be repair or adjusted ? (wtf), fuel filter clogged which is already new, incorrect igintion timing is what i believe not sure yet since it has a new timing belt on it, and lastly intake manifold leak air. so i havent checked yet and it really starting to pissed me off. it only does it for a short time at low rpm range like 1,500- 2,500. so fellas what u guys think this could be ? i really thougbt my motor was getting ready to go lol

 

any idea what this could be ? i think it more likly the timing issue since hard reving or somewhere in the feul system got clogged up. also on highways normal driving range about 3,500 it is normal, no stumbling or anything.

 

my a6 does the same exact thing,would also like to know...im kinda thinking maybe the o2 sensor..

 

ohh yeah i forgot to add, i already put in a new o2 about 6 months ago

 

Tps, or vaccum lines going to the map sensor maybe somehow got a hole?

 

well, i know i need to get another throttle body anyways since someone shaved the butterfly alil and it totally mess up the idle so right now the adjusting screw is all the in and it still sits at 1,100 sometimes. so need to get abother throttle body asap. but other than that could that be the issue when the idle screw is all the way in ? and also what i mean shaving the butterfly i mean the butterfily can be open either way without getting stoped where it suppose to be

 

Any code?

 

umm not yet, i'm more concern abt getting another throttle body but back to the point

 

could this be my o2 starting to go bad already even tho it brand new ? could i unplug it and see if it still stumbles?

 

i unplugged mine and it ran good until i got a code then started running the same plugged it back in no code and ran the **** all the time....

 

what have you done to the car since it ran good? your timing isn't just gonna go bad

 

What do your plugs look like?

 

i didnt do anything to it since it ran good, i just messing around with the idle issue that all but i already replace the rotor and cap , spark plugs, and the o2 and also new fuel fliter. i havent replaced the spark plug wires yet tho