GM 7X support for 4 cylinder engines

[prof315]

Would it be possible to add 4 cylinder engine support to the GM 7X decoder? I am in the process of installing an MS3-Pro on a 2005 2.2L Ecotec which uses the 7X for CKP and I am getting a "wrong cylinder count" config error. I have both composite and tooth logs if needed.

Thanks

Jeff

[jsmcortina]

Please post your MSQ, 4cyl should be allowed in the current firmware.

James

[prof315]

Sorry I meant to do this sooner....

Jeff

[prof315]

Any luck with this?

[jsmcortina]

Any luck with this?

Just tried it and I get the config error too. Investigating.

James

[jsmcortina]

There was no data for 4-cyl sequential with GM7X, so I've made up the triggers.

I'll send you a test code, but you need to strobe it and the code may need tweaking. The phase might be flipped too.
EDIT: Sent.

James

[JAM]

the 7x sequential for the 6 cylinder works excellent, james pulled some of his magic and has never missed a beat.
James if any of the new changes may effect the 6 cylinder just let me know i will load up the test code and verify

[prof315]

Got it, thanks James! I will report back as soon as I can.

[jsmcortina]

the 7x sequential for the 6 cylinder works excellent, james pulled some of his magic and has never missed a beat.
James if any of the new changes may effect the 6 cylinder just let me know i will load up the test code and verify

There shouldn't be any impact. In pseudo-code form I've done this:
Was:

Code: Select all

if (num_cyl == 4) {
set config error
} else if (num_cyl == 6) {
set up 6 triggers
}

Now:

Code: Select all

if (num_cyl == 4) {
set up 4 triggers
} else if (num_cyl == 6) {
set up 6 triggers
}

At this point I've touched nothing else. The actual wheel decoding is unchanged. Depending on how different the 4-cyl engine is, other changes may be required. I'll keep you (JAM) posted if there's anything that could alter 6-cyl behaviour.

James

[JAM]

Thats great, just keep me posted. Thanks for all the effort making all the decoders for so many applications.

[prof315]

Thanks for all the effort making all the decoders for so many applications.

X2!

[prof315]

Success! It needs a trigger angle of 0* for the correct timing but the engine fired on the first try

Thanks James!!!!!

Jeff

[jsmcortina]

Was the phasing for COP correct too?

James

[prof315]

I couldn't tell you as I am using the factory Ion Sense wasted spark ignition. Is there a way to test phasing with the sequential injection?

[jsmcortina]

If you are able to strobe the cam pulley from an injector wire, then maybe?

James