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Lean When Downshifting - Cant Fix iT (te 3 bar)

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Lean When Downshifting - Cant Fix iT (te 3 bar)

Old 06-18-2006, 10:28 PM
  #1  
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Default Lean When Downshifting - Cant Fix iT (te 3 bar)

I got my car running absolutely perfect this last 2 weeks and just halls *** and runs great as far as a/f's go all over the map, part throttle, idle, boost etc

But this week i hooked the wideband back up in my car and noticed that when I downshift/ compression brake, the car runs VERY lean, like off my sensors limits lean 19.4+

You can downshift at any point in any gear, I usually do it in 4th to third to slow down and roll around and the rpms are at about 3K, vacuum is in the -22 region. As soon as you downshift and are off both clutch and throttle itll start out @ 14:1 and the numbers just start going leaner and leaner until it pegs out the gauge and I pull it out of gear. Ive tried dumping fuel (15% so far) int the -22 area and its surrounding cells but it just wont richen up

The car is running ng55 turboedit on a gm 3 bar and dsm 450's, first time tuning a car so I may be missing something.

Heres my map if it makes a difference

CLICK!

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Old 06-18-2006, 10:32 PM
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Default Re: Lean When Downshifting - Cant Fix iT (te 3 bar)

hondas shut off the injectors completely over 1100-1200 rpm when theres 0% throttle

what you are describing is normal and nothing to worry about
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Old 06-19-2006, 12:03 AM
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Default Re: Lean When Downshifting - Cant Fix iT (te 3 bar)

Originally Posted by ****
hondas shut off the injectors completely over 1100-1200 rpm when theres 0% throttle

what you are describing is normal and nothing to worry about


Pretty much standard practice since the inception of electronic fuel injection.
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Old 06-19-2006, 06:01 AM
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Default Re: Lean When Downshifting - Cant Fix iT (te 3 bar)

Wow, can honestly say ive never heard that
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Old 06-20-2006, 01:08 AM
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Default Re: Lean When Downshifting - Cant Fix iT (te 3 bar)

Originally Posted by W O T
Wow, can honestly say ive never heard that
sure you have... about 3-4 posts up.
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