skipping engine cycles

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vishnu
MegaSquirt Newbie
Posts: 5
Joined: Tue Apr 14, 2015 8:45 am

skipping engine cycles

Post by vishnu »

Hi,

Just curious to find out if there is a possibility of tweaking the code, in such a way to enable "SKIP FIRING", ie to skip a fixed number of engine cycles. For example, skip 14 cycles and enable fuel injection and spark ignition at every 15th cycle alone.

I understand that the Rev Limiter tab in the MS Tuner Studio can be used as a method to cut "14 sparks out of every 15 sparks". How about the fuel injection?

Thank you very much in advance, for any suggestions.

-Vishnu
kjones6039
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Re: skipping engine cycles

Post by kjones6039 »

Just curious....... What the heck are you trying to accomplish here?

Ken
1979 Corvette - 383 CID SBC w/ Holley Pro-Jection 900 CFM TBI, 4-85 lb lo-z injectors & Walbro 255 pump
MS2 v3 w/ms2extra 3.4.0 Release
36-1, Delphi LS2/7 coils in wasted spark, driven by v2.0 logic board from JBPerformance
Spartan Lambda Sensor from 14point7
vishnu
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Posts: 5
Joined: Tue Apr 14, 2015 8:45 am

Re: skipping engine cycles

Post by vishnu »

Ken,

I believe that's what I have described in a short paragraph.
Do you have some solution to offer, to achieve skip firing using megasquirt?
Matt Cramer
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Re: skipping engine cycles

Post by Matt Cramer »

You'd have to write your own modifications to the firmware to do this.
kjones6039
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Posts: 618
Joined: Sat Jul 22, 2006 7:02 pm
Location: Eureka, Nevada USA
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Re: skipping engine cycles

Post by kjones6039 »

vishnu wrote:Ken,

I believe that's what I have described in a short paragraph.
Do you have some solution to offer, to achieve skip firing using megasquirt?
My apologies for offending you! Since I am not the sharpest tool in the shed, I was merely trying to clarify in my own mind what you were going to use, what you describe as "skip firing", for! I freely admit that my question was prompted by my own selfish need for self edification. I shan't bother you again!

Again, my apologies!

Ken
1979 Corvette - 383 CID SBC w/ Holley Pro-Jection 900 CFM TBI, 4-85 lb lo-z injectors & Walbro 255 pump
MS2 v3 w/ms2extra 3.4.0 Release
36-1, Delphi LS2/7 coils in wasted spark, driven by v2.0 logic board from JBPerformance
Spartan Lambda Sensor from 14point7
vishnu
MegaSquirt Newbie
Posts: 5
Joined: Tue Apr 14, 2015 8:45 am

Re: skipping engine cycles

Post by vishnu »

Matt Cramer wrote:You'd have to write your own modifications to the firmware to do this.
Thanks Matt. Yes, I'm trying to insert a loop which counts the number of cam trigger pulses and then sends it to the injector, when the condition satisfies to be true.
vishnu
MegaSquirt Newbie
Posts: 5
Joined: Tue Apr 14, 2015 8:45 am

Re: skipping engine cycles

Post by vishnu »

kjones6039 wrote:
vishnu wrote:Ken,

I believe that's what I have described in a short paragraph.
Do you have some solution to offer, to achieve skip firing using megasquirt?
My apologies for offending you! Since I am not the sharpest tool in the shed, I was merely trying to clarify in my own mind what you were going to use, what you describe as "skip firing", for! I freely admit that my question was prompted by my own selfish need for self edification. I shan't bother you again!

Again, my apologies!

Ken
No worries, Ken! Thanks.
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