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Stop your Car Stalling from Clutch in!

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Old Sep 13, 2016, 06:32 AM   #61
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Anymore findings? Mine used to just exhibit lower rpm upon clutch-out, but is now completely stalling, causing dangerous situations on the road, like turning into gas stations or stores.
I've got a reasonably good handle on it for my Evo now. The crux of the issue is getting back to a good afr after decel. Since the injectors are off during decel, the intake runners are dry, so extra fuel is needed when fuelling resumes to re-wet the walls. The need to stop the decel is also aided by extra fuel. For my experience, I did not need to touch the ISCV tables. It was all fixed with fuel cut disable. There is an algorithm to add an extra shot of fuel when the injectors are reenabled. Due to my 100 rpm higher-than-stock idle, and probably due to running R2s, I had to raise the decel fuel cut disable by 250 rpm.

The key though is having the correct tables. As it turns out, the decel fuel cut tables that were posted many years ago are incorrect. They are ISCV control tables. I have the correct tables now and will post them later today.

Having sad all that, IMHO the decel fuel cut tables should only be adjusted after everything else is in good order. Leaking throttle shaft seals would definitely exacerbate the issue. The injectors should also be well tuned and clean. On Evo 9s, it would be beneficial to minimize MIVEC (overlap) in the 10 and 20 load cells up to at least 1500 rpm and maybe to as much as 2000 rpm.

Last edited by mrfred; Sep 13, 2016 at 06:43 AM.
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Old Sep 16, 2016, 05:45 AM   #62
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Originally Posted by mrfred View Post
I've got a reasonably good handle on it for my Evo now. The crux of the issue is getting back to a good afr after decel. Since the injectors are off during decel, the intake runners are dry, so extra fuel is needed when fuelling resumes to re-wet the walls. The need to stop the decel is also aided by extra fuel. For my experience, I did not need to touch the ISCV tables. It was all fixed with fuel cut disable. There is an algorithm to add an extra shot of fuel when the injectors are reenabled. Due to my 100 rpm higher-than-stock idle, and probably due to running R2s, I had to raise the decel fuel cut disable by 250 rpm.

The key though is having the correct tables. As it turns out, the decel fuel cut tables that were posted many years ago are incorrect. They are ISCV control tables. I have the correct tables now and will post them later today.

Having sad all that, IMHO the decel fuel cut tables should only be adjusted after everything else is in good order. Leaking throttle shaft seals would definitely exacerbate the issue. The injectors should also be well tuned and clean. On Evo 9s, it would be beneficial to minimize MIVEC (overlap) in the 10 and 20 load cells up to at least 1500 rpm and maybe to as much as 2000 rpm.
Mrfred, did you end up posting these tables?
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Old Oct 30, 2016, 04:54 PM   #63
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Bump for MFRED.

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Mrfred, did you end up posting these tables?
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Old Nov 4, 2016, 05:33 PM   #64
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Bump for MFred on those tables.
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Old Apr 19, 2017, 09:10 PM   #65
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Anyone every figure out the correct tables? I'm on 94170715 and the "clutch-stall" is killing me, almost hit a parked car the other day while turning.

I did find a thread taking about advancing ignition between 500-1000rpm and 20-60 load. Will try that and report if it fixes anything.

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