I just updated my 1.01 MS with the 3.0 firmware and now my car is running very lean. Was there a change in the way fuel was calculated, or could I be seeing a hardware problem?
The short backstory is, I updated the firmware to get the PWM disable while cranking, because I was having a very hard time starting my car unless the engine was warm and the battery had a solid change.
Engine is a Mazda 13B with a large street port (needs lots fuel when cranking cold) with two 680cc injectors. PWM settings are 1.0ms, 75%, and 1.0ms.
I had been sorta kinda having problems with cranking before, and had been bumping into the 25.5ms limitation in trying to get the car to start cold. The problems came to a head with the new engine. With the PWM-disable feature of the 3.0 code, my settings are now much more in line with what other people seem to use.
Now that I think of it, when I grabbed a generic 13B VE table for use with my original 13B (standard 6-port) I had to take a lot of fuel out everywhere... Hmm.
Does v3.0 code calculate fuel different from early code?
Forum rules
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.
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.
Re: Does v3.0 code calculate fuel different from early code?
I wasn't using the 2.0 code, though... I was using that which was shipped with the original 2001 group buy. (My chip had the red T on it and everything)
Re: Does v3.0 code calculate fuel different from early code?
There have been massive changes since the first code, but the basic fuel is still calculated the same way. The ini file is also massively different, so there is a good chance there are values that aren't optimum. I would just read up on all the new inputs and start tuning.