Note: Swapping injectors isn't an option for me. I'd like to determine why this is happening and reconfigure the MS II to solve.fordfanboi wrote:I have this exact issue. It's always when cruising at 50-40 MAP and it will oscillate my AFR 2 pts. MapDOT is oscillating wildly. My AE is TPS only. What the heck is causing my MapDOT to go crazy. The MAP in the log looks fine - looks like anywhere else in the log - just the MapDOT is wigging out.
Any idea how was this solved in this thread?
Thanks!
big afr swings
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Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0). For tuning/troubleshooting questions, please attached a datalog and your MSQ file to your post.
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
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fordfanboi
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Re: big afr swings
MS II v3.0 (2.920), 408ci, Holley 900cfm TBI, Victor Jr, Mech Roller 254/260@0.050 - 0.642/0.578
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phongshader
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Re: big afr swings
sorry i missed this reply, In my situation the combination of going to a progressive throttle opening on a 4 barrel and smaller injectors cured it for me, I see you can't change injectors but maybe you can modify your throttle linkage...anyhow that's what worked for me.
MSII 2.88, V2.2, Megatune 2.25, LC-1
Olds 215 v8 in a '59 Alfa Romeo Spider 2000
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MS3/3x, TS 2.0.5, LC-1
Duratec 2.3, GSXR itb, Locost
Olds 215 v8 in a '59 Alfa Romeo Spider 2000
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MS3/3x, TS 2.0.5, LC-1
Duratec 2.3, GSXR itb, Locost
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LT401Vette
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Re: big afr swings
Under the Tools menu have you calibrated your AFR to match your LC1?
It looks almost like a narrowband pattern and while you are quickly swinging from lean to rich at steady state, it seems you are not close to reading the full range of the LC1 output.
It looks almost like a narrowband pattern and while you are quickly swinging from lean to rich at steady state, it seems you are not close to reading the full range of the LC1 output.
Phil Tobin
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EFI Analytics, helping to simplify EFI with Next Generation tuning software.
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http://www.efiAnalytics.com/MegaLogViewer/
Android Shadow Dash MS: http://tunerstudio.com/index.php/shadowdashmsmenu