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Old 05-04-2006, 01:23 PM   #1
WhiteKnight
Scooby Newbie
 
Member#: 56133
Join Date: Feb 2004
Vehicle:
2004 Euro spec Sti
Black - Rotated gt3037s

Default Backfire @ shifting

I can see fireballs from the mirror and car feels awkward while shifting.

Is this related with "throttle pump" settings ?

How can i smoothen shifting ?

Thanks
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Old 05-04-2006, 01:30 PM   #2
herewegoagain
Scooby Newbie
 
Member#: 107778
Join Date: Feb 2006
Chapter/Region: TXIC
Location: Hizzurst, Texas
Vehicle:
2006 Legacy GT Sedan
Obsidian Black

Default

I have no idea, but what you are describing is afterfire. A backfire goes back through the intake manifold.


I once had afterfire on my old RS-T. Felt like someone threw a bowling ball on my floorpan.
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Old 05-04-2006, 01:59 PM   #3
bboy
Scooby Specialist
 
Member#: 56468
Join Date: Mar 2004
Chapter/Region: NWIC
Location: Seattle, WA
Vehicle:
04 Improved STI
Dirty White

Default

I'd try lowering Decel Enrichment and I'd look at the vacuum part of the fuel map.

As you shift have someone watch the AFR and which cell(s) is active during the shift. You may find you need to remove fuel from that cells and those surrounding it. (most likely the whole load column).

Now, are you seeing fireball when you get back on the gas? That could be throttle pump.
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Old 05-05-2006, 02:27 AM   #4
Element Tuning
Former Vendor
 
Member#: 54918
Join Date: Feb 2004
Location: 673 WHP Element ProComp Engine
Default

From some of the other questions you've posted it sounds like you have a really bad base map. It doesn't sound like you have an Element Tuning version of the Hydra EMS as I don't sell these outside of North America but if you are interested we do sell base maps and tech support to those who do not own an Element Hydra.

Based on the amount of backfire and the fire ball it sounds like your main fuel map is much too rich in the lower vacuum load sites.

Good luck.
Phil
www.elementtuning.com
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