DIY PROM Do It Yourself PROM chip burning help. No PROM begging. No PROMs for sale. No commercial exchange. Not a referral service.

Engine runs lean across the complete VE-Table

Thread Tools
 
Search this Thread
 
Old May 28, 2010 | 05:04 AM
  #1  
vettef6's Avatar
Thread Starter
Junior Member
 
Joined: Jul 2004
Posts: 25
Likes: 0
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??
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Terrell351
Engine/Drivetrain/Suspension Parts for Sale
5
Jun 13, 2021 01:13 PM
Vintageracer
Camaros for Sale
12
Jan 10, 2020 05:33 PM
theshackle
Tech / General Engine
4
Mar 5, 2017 06:37 PM
Jae992
TBI
3
Aug 27, 2015 09:07 AM
camaroken83
Exhaust
6
Aug 10, 2015 11:35 AM




All times are GMT -5. The time now is 02:16 PM.