⛔★ Way too rich on Deceleration, can't figure it out (high cold idle fixed tephra v7) - EvolutionM - Mitsubishi Lancer and Lancer Evolution Community

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⛔★ Way too rich on Deceleration, can't figure it out (high cold idle fixed tephra v7)

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⛔★ Way too rich on Deceleration, can't figure it out (high cold idle fixed tephra v7)

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Old Apr 20, 2017, 07:06 PM
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⛔★ Way too rich on Deceleration, can't figure it out (high cold idle fixed tephra v7)

Just updated to Tephra V7 94170715 and having some issues:

- High COLD engine idle
FIXED by lowering upper ISCV Demand CTS Adder #1**

- Engine stall after pressing clutch in and letting go of accelerator

- Really RICH mixture anytime I let go of the accelerator


Rick mixture (in 10's) after letting go of accelerator will

Can anyone give me any ides what could be causing a RICH mixture after closed throttle?

How do you tune for Deceleration?

I'm 90% sure after the throttle is closed mixture should be LEAN not RICH.
I'm using a BOV but I still have it recirculated back into the custom intake so this shouldn't be the issue



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Old Apr 24, 2017, 11:21 PM
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Take a look at your decel fuel cut tables.
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Old Apr 25, 2017, 11:39 PM
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Originally Posted by Hakke View Post
Take a look at your decel fuel cut tables.
Hey Hakke, I don't see a decel fuel cut table in tephra v7,

only see a decal fuel cut delay. Am I missing something or we talking about the same thing?






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Old Apr 25, 2017, 11:45 PM
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oh we must have different definitions, i see mine differently

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Old Apr 25, 2017, 11:57 PM
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Actually they are the same, and all the numbers look the same too.

Only thing thats different is I added an extra table called "Decel fuel cut RESUME RPM" because I though this might be the issue as someone mentioned it in another thread. But after playing around with that one table I realized it isn't the issue at all and you're better off not touching it.

Someone mentioned in another post that its possible that my ecu isn't turning injectors OFF after i let go of the gas, possibly because my TPS isn't adjusted right but it is adjusted. In my openport 2 log I get 100% TPS when I floor the gas paddle and 13.7% without touching it so it seems to spec...

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Old Apr 26, 2017, 12:09 AM
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Hmm yeah those look right. Are you sure your injector scaling isnt too low? That will definitely cause that. Its fine on throttle tip in?
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Old Apr 26, 2017, 12:17 AM
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Yea my scaling is fine, I actually currently have it on the leaner side and still every time I let go of the gas after even a slow acceleration my wideband AF goes into 10's 11's for a while.

It should really go into lean because injectors should be OFF after decel


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Old Apr 26, 2017, 12:20 AM
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I'm going to check my TPS voltages tomorrow with a multimeter and see if they are in specs too, who knows maybe they aren't and my openport2 logger isn't telling the right numbers???


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Old Apr 26, 2017, 01:35 AM
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Hello supak111.

Please read this thread.
https://www.evolutionm.net/forums/ec...701715-v7.html
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Old Apr 26, 2017, 02:10 AM
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will do


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