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Old Thu, May-29-2008, 05:00:37 PM   #1
maxxpsi
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Default VF Stage 2 flat spots?

I know of several other cars that have this problem. very lean between 1,000 rpm to 3,000 rpm. I have not gotten a check engine light but it is getting very old. The car hesitates and then takes off when it has enough fuel. It did not do this while I was at stage 1. I have driven another vf stage 2 and the lean out is in the exact same spot as mine. Talking with others you would think they were talking about my car.
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Old Thu, May-29-2008, 05:14:29 PM   #2
avants4
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stg1 ftw! hahaha... j/k

have you discussed this with nik?
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Old Thu, May-29-2008, 05:25:25 PM   #3
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Quote:
Originally Posted by maxxpsi View Post
I know of several other cars that have this problem. very lean between 1,000 rpm to 3,000 rpm. I have not gotten a check engine light but it is getting very old. The car hesitates and then takes off when it has enough fuel. It did not do this while I was at stage 1. I have driven another vf stage 2 and the lean out is in the exact same spot as mine. Talking with others you would think they were talking about my car.
I saw this on a VF stage 2 car and it did the exact same thing. I would suspect that it has to do with the DME software they are using.
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Old Thu, May-29-2008, 06:03:28 PM   #4
maxxpsi
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stg1 ftw! hahaha... j/k

have you discussed this with nik?

I have tried but have not received a call or email back. I am sure he is just busy but this is getting old.
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Old Thu, May-29-2008, 06:08:47 PM   #5
05SCM3
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Quote:
Originally Posted by maxxpsi View Post
I know of several other cars that have this problem. very lean between 1,000 rpm to 3,000 rpm. I have not gotten a check engine light but it is getting very old. The car hesitates and then takes off when it has enough fuel. It did not do this while I was at stage 1. I have driven another vf stage 2 and the lean out is in the exact same spot as mine. Talking with others you would think they were talking about my car.
What kind of AFRs are you seeing there? For that matter, what boost levels are you seeing across the power band?

Last edited by 05SCM3; Thu, May-29-2008 at 06:18:04 PM.
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Old Thu, May-29-2008, 06:17:28 PM   #6
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What kind of AFRs are you seeing there?
at idle I am at 14-15, when I start to drive the car hesitates and my afr's go to 18+ and then then it snaps back to 14-15.
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Old Thu, May-29-2008, 06:25:17 PM   #7
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other than that the car runs perfect. pulls hard and afr are perfect when I am cruizing. no heat soak..
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Old Fri, May-30-2008, 12:45:41 AM   #8
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Does it happen before or after the engine is at normal operating temperature?
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Old Fri, May-30-2008, 05:14:31 AM   #9
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Does it happen before or after the engine is at normal operating temperature?
both. it is alot better once it has warmed up but still has flat spots.
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Old Fri, May-30-2008, 05:15:43 AM   #10
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I saw this on a VF stage 2 car and it did the exact same thing. I would suspect that it has to do with the DME software they are using.
I don't think it is software, has to be something simple.
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