wierd observation w/ random misfire code
10-11-2005, 01:41 PM
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wierd observation w/ random misfire code
i thought you forced indution guys would want to know this, since my rebuilt moter everytime i drive the car i got the p300 code (random misfire in mutiple cylinder) really no big deal i have a scanner and jsut cleared the code, cause the car was running fine. i know alot of you guys using the emanage get this code and even more w/ rebuilt moters. anyways 2 weeks ago i replaced my hks hi-power exhaust with a custom dual 3" exhaust. ever since the swap the code has never came back, (keep in mind i would get the code everday before the swap). any ideas on whats going on?
10-11-2005, 01:53 PM
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Search for the code, this has been discussed alot. Here is one link:
https://my350z.com/forum/forced-induction/142187-ses-p0300-code.html
https://my350z.com/forum/forced-induction/142187-ses-p0300-code.html
10-11-2005, 02:23 PM
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Originally Posted by teh215
Search for the code, this has been discussed alot. Here is one link:
https://my350z.com/forum/showthread.php?t=142187
https://my350z.com/forum/showthread.php?t=142187
10-11-2005, 02:38 PM
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Paul, same thing happened with a couple of cars we did. The misfire code can be caused by a ton of different things. However, with higher boost cars, and restrictive exhuast, the extreme backpressure and thermal load on the motor can cause a subtle misfire. Switching to a free flowing true dual 3 inch made the code go away.
Backpressure is a serious enemy of safe FI operation.
Backpressure is a serious enemy of safe FI operation.
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