Engine stutters at 2000-2500rpm


_JT

_JT

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I have a problem...when my engine is cold, it stutters around 2000-2500rpm when i DON'T go full throttle. I already installed a new petrol filter. It does not stutter on full throttle, nor does it when the engine is warn. I also get an engine fault code and it's code 43 - fuel supply system. Anyone got an idea what it might be then?
 
Sparkplugs are only 15k km's old. Is there any way to check the injectors of fuel pump easily?
 
_JT said:
I have a problem...when my engine is cold, it stutters around 2000-2500rpm when i DON'T go full throttle. I already installed a new petrol filter. It does not stutter on full throttle, nor does it when the engine is warn. I also get an engine fault code and it's code 43 - fuel supply system. Anyone got an idea what it might be then?
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RagingAngel said:
fuel injector(s)/bad sparkplug(s), fuel pump
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does not sound like thats your problem. replace your o2 sensor. i have seen this happen before. fuel trim parameter is adjusted by the o2 sensor. dont go out and injector cleaner or anything else. 90% of time code 43 pops up its a bad o2 sensor.
 
Yeah, thats what I wanted to say also: the petrol mixture is extremely rich, I have backfires all the time. Which on itself is nice :p But not if the car runs like **** when it's cold and mileage decreases significantly :( But the o2 sensor would explain the running rich.
 
also could be fuel pressure regulator at fault,
could be sticking or vacume pipe leaking.
 
Putting her on a bridge coming monday to check out my lambda and the wire running to it under the car.

denward said:
sounds like the plugs to me.
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You telling me it are the plugs, after only 9k miles???
 
I've put back the original header....no leaks whatsoever and the sensor was brand new when I put it in. No problems anymore.
 
i got a d16 v tech with a td04 turbo whats the most ificion psi setting? its tuned to perfection but i barely got it from my bro so i dont really know much about it
 
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