Spark cut limiting not working at all?
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Spark cut limiting not working at all?
So I'm setting up a ms2 v3.0 setup on a 94 chev lt-1 with an hc1 holeset. Now I've been trying to figure out this limiter setup, but the engine just blows past my set Rpm everytime if I'm only on spark cut limiting? I've tried shrinking and expanding the soft limit/hysteresis, fixed angle or progressive, from 20 to -10, and nothing happens? If I turn on the fuel cut then it limits fine, but that's not what I'm trying to accomplish. Is there some hidden setting somewhere that doesn't allow the limiter to control the coil?
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Re: Spark cut limiting not working at all?
I can repair or upgrade Megasquirts in UK. http://www.jamesmurrayengineering.co.uk
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Re: Spark cut limiting not working at all?
heres the current msq
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Re: Spark cut limiting not working at all?
And a datalog of it not working?
James
James
I can repair or upgrade Megasquirts in UK. http://www.jamesmurrayengineering.co.uk
My Success story: http://www.msextra.com/forums/viewtopic ... 04&t=34277
MSEXTRA documentation at: http://www.msextra.com/doc/index.html
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Re: Spark cut limiting not working at all?
Are you using EDIS HEI or TFI? Depending on how they are setup you may not be able to cut spark.
Correctly identify your MS ecu here
Read the Do's and Don'ts to avoid the common pitfalls before starting your install or asking for help
Use only these manuals other manuals may cause brain damage or worse.
Read the Do's and Don'ts to avoid the common pitfalls before starting your install or asking for help
Use only these manuals other manuals may cause brain damage or worse.
Re: Spark cut limiting not working at all?
Have you tried setting your soft limit closer to your hard limit try 200-300, its set at 1000 at the moment.
1990 bmw 320i daily driver with m20b25 ms3 sequential fuel, 380cc injectors, d585 coil near plug, home made cam sync, launch control, fan control, vss, homebrew egt logging what's next????
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Re: Spark cut limiting not working at all?
I'm firing the coil directly, signalling the ms directly from the optispark distributor using a basic trigger hall signal. I've tried the soft limit from 100-1000 rpm, no change.
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Re: Spark cut limiting not working at all?
Have you checked that your timing with a strobe and checked that it responds to changes in "Fixed Advance" ?
James
James
I can repair or upgrade Megasquirts in UK. http://www.jamesmurrayengineering.co.uk
My Success story: http://www.msextra.com/forums/viewtopic ... 04&t=34277
MSEXTRA documentation at: http://www.msextra.com/doc/index.html
New users, please read the "Forum Help Page".
My Success story: http://www.msextra.com/forums/viewtopic ... 04&t=34277
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Re: Spark cut limiting not working at all?
No I haven't, I don't have any timing marks on the pulley, they are factory set. I guess I could ad some, but the engine doesn't respond to anything from the spark limiting, I figure it would be felt, even slightly if the limiter was trying to do anything
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Re: Spark cut limiting not working at all?
As per the manual, checking timing with a strobe is ESSENTIAL on every install.
James
James
I can repair or upgrade Megasquirts in UK. http://www.jamesmurrayengineering.co.uk
My Success story: http://www.msextra.com/forums/viewtopic ... 04&t=34277
MSEXTRA documentation at: http://www.msextra.com/doc/index.html
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My Success story: http://www.msextra.com/forums/viewtopic ... 04&t=34277
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Re: Spark cut limiting not working at all?
ok so ive been doing some testing on the stim, and im noticing that on the tunerstudio screen, it is saying spark cut in red at the specified rpm, but the ign light on the stim doesnt ever go out? i made 2 logs, only changes between them is one has retard to -10deg limiting plus spark cut, and the second is just spark cut. please let me know if theres something im missing, this is getting very annoying. thanks
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Re: Spark cut limiting not working at all?
the last msq
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Re: Spark cut limiting not working at all?
I'm confused: you have the MSL files named "2" and "3", but the MSQs are "1" and "2". Which ones go together?
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Re: Spark cut limiting not working at all?
Check your timing.
Until you have done that it is a waste of time posting.
James
Until you have done that it is a waste of time posting.
James
I can repair or upgrade Megasquirts in UK. http://www.jamesmurrayengineering.co.uk
My Success story: http://www.msextra.com/forums/viewtopic ... 04&t=34277
MSEXTRA documentation at: http://www.msextra.com/doc/index.html
New users, please read the "Forum Help Page".
My Success story: http://www.msextra.com/forums/viewtopic ... 04&t=34277
MSEXTRA documentation at: http://www.msextra.com/doc/index.html
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Re: Spark cut limiting not working at all?
Really? How is it a waste of time posting, if I'm seeing the same problem on my stim as I was in the car. Verifying the timing has nothing at all to do with spark cut. This is what I'm trying to rectify.
And 2 goes with 1 and 3 goes with 2
And 2 goes with 1 and 3 goes with 2
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Re: Spark cut limiting not working at all?
Do you understand that there is no "spark cut", only a spark retard? Setting "off" there means the spark isn't affected by the rev-limiter at all. (Correct me if I'm wrong about that, folks!)
Edit: the log with it set for retard shows it working fine.
Edit: the log with it set for retard shows it working fine.
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Re: Spark cut limiting not working at all?
ok, so why does it say "spark cut limiting: on or off" which i have "on" in both logs, but my coil output on stim stays active the whole time? i can see the spark retard working fine in the logs when i have that on, but im getting no cutting of the spark output, like its supposed to. i cant be the only one having this issue. does it matter that im running on a basic trigger, cam only? the only thing that seems to happen in regards to the spark cut option, is that when i reach my hard limit, it says "spark cut" in red at the bottom of the tuner studio screen, but nothing else happens....
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Re: Spark cut limiting not working at all?
Yes there is definitely a spark cut option. The tool tip even says be careful not to blow up your mufflers. Does it work? I have no idea as I only use retard. I also don't have basic trigger either.
If it was an issue only on basic trigger than you might be the first to have found it. I think wheel decoder is the most common used input. What code version are you on?
If it was an issue only on basic trigger than you might be the first to have found it. I think wheel decoder is the most common used input. What code version are you on?
Find the Manuals up top under Quick links: Manuals.
Cheers Luke
Cheers Luke
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Re: Spark cut limiting not working at all?
Just tried it out on extra3.3.1 and spark cut works as expected.
Find the Manuals up top under Quick links: Manuals.
Cheers Luke
Cheers Luke
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Re: Spark cut limiting not working at all?
Where are you seeing the "spark cut" option? It doesn't seem to be in the rev-limit menu. Is my TS just out-of-date? (See attached screen-shot)