G35 Coupe V35 2003 - 07 Discussion about the 1st Generation V35 G35 Coupe

03 g35 full throttle issue in lower gears

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Old 05-17-2019, 02:59 PM
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03 g35 coupe
Does anyone know if itís possible that maybe my ecu taught itself how to do that because of the fact I normally get close to flooring my pedal every time I first start driving and Iíll adjust so my first gear revs loud as possible for as long as possible
 
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Old 05-17-2019, 07:23 PM
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Ok in that case it sounds like you have an upstream O2 sensor not cycling properly. Get it on an OBD2 scanner that shows realtime data and make sure they are cycling properly. You should be able to look up a youtube vid of o2 sensor cycling to see what it should look at.

Make sure to check it at idle AND while doing a few WOT pulls (in park, not driving unless you are logging data, don't wreck your car staring at an OBD2 scanner while driving).

O2 sensors are only good for MAYBE 100k miles before they start to show signs of wear but they die an extremely slow death and in some cases can last for 300k miles however the delay in output is significant and imo they should be replaced at around 60-80k.

EDIT: For a performance car anyways, your daily driver shitbox that doesn't get pushed hard will probably never need them replaced.
 
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Old 05-18-2019, 12:44 AM
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Originally Posted by [email protected] View Post
Ok in that case it sounds like you have an upstream O2 sensor not cycling properly. Get it on an OBD2 scanner that shows realtime data and make sure they are cycling properly. You should be able to look up a youtube vid of o2 sensor cycling to see what it should look at.

Make sure to check it at idle AND while doing a few WOT pulls (in park, not driving unless you are logging data, don't wreck your car staring at an OBD2 scanner while driving).

O2 sensors are only good for MAYBE 100k miles before they start to show signs of wear but they die an extremely slow death and in some cases can last for 300k miles however the delay in output is significant and imo they should be replaced at around 60-80k.

EDIT: For a performance car anyways, your daily driver shitbox that doesn't get pushed hard will probably never need them replaced.
those were also replaced because it was throwing a code when I got the motor swapped. it's not throwing a code but I guess i'll give it a try. will post if successful or not afterwards
 
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