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a POP sound n burning smell

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elmo-S15

Guest
Hi.. Just want to know ur opinion.. Is it fine or not.. I've replaceed my stock exhaust with 5zigen 2 1/2'' exhaust.. The sound are great.. The problem is there is a POP sound at the exhaust when i shift my gear, is that fine? And i can smell a burning when i park my car after a run..
 

LuPix_S15

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Pop sound is probably due to having a BOV/dump valve fitted to your Silvia which means the car will pop a lot between gear changes etc. Mine does the same :)


Smells of burning? Do you mean more like burnt petrol etc?? This is normal.
 
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elmo-S15

Guest
Thanks for the reply.. Yeah i fitted ssqv on my s15.. Its not flaming right? yup its petrol smell.. So mine is fine.. Cheers pal
 
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elmo-S15

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Ok i thought not enough air flowing through the exhaust producing a pop.. I havent try it off the limiter.. i'll try someday.. I just plum it back.. What do u mean doesnt make sense?
 
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Giff

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The S15 has a Mass Airflow Meter, it measures the amount of air coming in to the system and adjusts the fuelling to suit, a VTA BOV lets some of that air escape from the system so while the ECU is fuelling for the full amount the engine only receives a smaller amount, the result is the air/fuel mixture becomes very rich, you get all sorts of pops in the exhaust as unburnt fuel is dumped in to it and the car runs like a pig.
 
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elmo-S15

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I dont know about that.. So its not fine if the car run likes a pig? Yeah i think the sizes is too small and not enough air flow for the turbo car.. But the seller said its suits for 2.0cc cars.. I'll check again at the shop
 
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Only happens when you come off the throttle, so it's not a big issue IMO.
And how often does that happen in street driving. I VTA'd and my fuel economy when down hill, the plugs fouled up and if I let it go further I would have stuffed the O2 sensor and my Cat.
 
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