How much should AFR fluctuate at idle?
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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.
How much should AFR fluctuate at idle?
This is a question for you guys who have sorted out your engines and reach a point that I'm trying to achieve. How much does your AFR fluctuate at idle. Currently, my engine will move between 14.0 and 15.8 at idle, back and forth just kind of moving all over the place. To me, that seems like too wide of a range for a good running motor. I feel like it should move more than 0.1 - 0.5 when it's warmed up and just sitting at idle. Your input is greatly appreciated.
Porsche 928 track car - Chevy 350 TPI, 24 lbs injectors, mild cam, 7-pin HEI, MSIIv3.0 2.905
First time MS'er...
First time MS'er...
Re: How much should AFR fluctuate at idle?
i found on my bike conversion the MAP reading fluctuated a lot, i put an extra long thin pipe from the maniforld to the MAP sensor to dampen it. worked ok, wonder if you've got that sort ogf issue?
Re: How much should AFR fluctuate at idle?
Ok, I'll have to see if my MAP moves around at idle as much as my O2 readings do. Maybe it's time for alpha-n blending?
Porsche 928 track car - Chevy 350 TPI, 24 lbs injectors, mild cam, 7-pin HEI, MSIIv3.0 2.905
First time MS'er...
First time MS'er...
Re: How much should AFR fluctuate at idle?
hi kccampro
mine does too, jumps anywhere between 13.5 and 14.3
I'll be interested in hearing if you find a soliution for it
Sam
Btw, i'm also thinking of Blended Alpha-n. I have MSII 2,8 and I've heard its much simpler with MS3.
I've read a bit about MSII and blending but i must be dumb cause its just making my head spin
mine does too, jumps anywhere between 13.5 and 14.3
I'll be interested in hearing if you find a soliution for it
Sam
Btw, i'm also thinking of Blended Alpha-n. I have MSII 2,8 and I've heard its much simpler with MS3.
I've read a bit about MSII and blending but i must be dumb cause its just making my head spin
Alfa Romeo - 1979 Sedan
14pont7 - SLC WB
EDIS 4 ignition
MSII ECU v3 board v2.891 code & Relay Board
98/99 Suzuki 750 GSXR ITB, fuel regulator & TPS.
14pont7 - SLC WB
EDIS 4 ignition
MSII ECU v3 board v2.891 code & Relay Board
98/99 Suzuki 750 GSXR ITB, fuel regulator & TPS.