Engine runs lean across the complete VE-Table
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Junior Member
Joined: Jul 2004
Posts: 25
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From: Germany
Car: 1992 LT1 Corvette
Engine: 396ci
Transmission: ZF 6 speed
Axle/Gears: 4.10
Engine runs lean across the complete VE-Table
Didn’t want to remove my chip so often, so I plugged in my Emulator, all of a sudden engine runs lean. I thought at first it could be a leak but I couldn’t anything.
AFR was about 14.0 now 19-21 AFR, on both banks since I have two wide bands.
MAP idle vacuum didn't change, it's about the same as before 62-65 MAP.
Fuel pressure is 44 psi
TPS .57 volts
Running open loop
Removed the Emulator and put in my last chip, same thing again, AFR way to high. I even tried much older chips. So I finally enriched the mixture to about 14.0 again and haven't noticed any problems since.
VE idle table value was 38.2 now about 42.5
All the way across the VE table up to 7000 rpm I had to add about 8-10%
What could have caused this??
AFR was about 14.0 now 19-21 AFR, on both banks since I have two wide bands.
MAP idle vacuum didn't change, it's about the same as before 62-65 MAP.
Fuel pressure is 44 psi
TPS .57 volts
Running open loop
Removed the Emulator and put in my last chip, same thing again, AFR way to high. I even tried much older chips. So I finally enriched the mixture to about 14.0 again and haven't noticed any problems since.
VE idle table value was 38.2 now about 42.5
All the way across the VE table up to 7000 rpm I had to add about 8-10%
What could have caused this??
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