gas smell?
hey so here's the issue...
when i am accelerating past about 4000 rpm and i shift the BOV vents to atmosphere and there is a distinct smell of raw fuel in the cabin. only seems to happen when i am running boost > 4 psi. i am assuming that my throttle plates aren't shutting fast enough and that some air/fuel mixture is being vented as well. just wondering if that is normal, as my only other turbo experience is with a toyota ijz-gte twin turbo. the bov is located on the intake pipe leading to the throttle body. Thanks! |
The car is probably just running very rich under boost. Do you have a way to monitor AFRs? What engine management are you running?
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check for leaks at the pulsation dampner and injectors too.....
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Originally Posted by Aaron Cake
(Post 9927067)
The car is probably just running very rich under boost. Do you have a way to monitor AFRs? What engine management are you running?
as for leaks at the PD and injectors, i have checked the pulsation dampener, there are no leaks and it is relatively new, it's an s5 five motor and i have replaced the fuel rails. As far as the injectors go i can't see any leaks... |
Who did your tune? Sounds like it is just very rich.
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i'm not sure who did the tune, apparently some guy in ontario or quebec. no first hand contact with him. i don't really know where to start when it comes to making fuel maps. I mean, i understand how to use the program, but practical application is beyond me. to be honest im just worried about creating a lean condition. any hints or tips? i might take it to get tuned by my local rotary shop but cash is an issue when you're in school!
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Yeah, I don't suggest you start messing with it if you don't have a way of monitoring AFRs or any tuning experience. You might be stuck either just living with the richness, or going to a dyno with someone familiar with rotary tuning.
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