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Old 03-11-2008, 12:48 AM   #1
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Default MegaSquirt in Parallel Questions

I have a 92 with the engine from a 94. I have A/C and I want to keep it.
I'd like to buy a MegaSquirt already assembled instead of building it myself.

From reading FAQ's scanning the MegaManual, and browsing the forums I think (but I'm not sure) I should get the Megasquirt II and run it in parallel with my existing ECU. This should allow the Mazda ecu to control the idle and the A/C.

I haven't found anything written but I suspect if I'm going to run in parallel I shouldn't bother with the Plug & Play. Is this correct?

I haven't found a wiring diagram that shows the connections to be done in a parallel setup. Can someone point me in the right direction?

Thanks
Vince
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Old 03-11-2008, 12:52 AM   #2
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Are you kidding me?

The link is in my signature and atop the MS forum as a huge "SUPER important" sticky.
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Old 03-11-2008, 12:53 AM   #3
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get an MSI.

have Scott or Chad build it.

https://www.miataturbo.net/forum/showthread.php?t=13676




a parallel MSI controls fuel and spark

a standalone MSI can be made to control idle and fans

the MSPNP is a standalone that controls your idle, your fans, and AC in addition to all the things a parallel MS does.
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Old 03-11-2008, 01:09 AM   #4
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Originally Posted by cjernigan View Post
Are you kidding me?

The link is in my signature and atop the MS forum as a huge "SUPER important" sticky.
No, I'm not kidding you. There are indeed a number of links & stickys here. I've been reading for weeks and I probably haven't covered 1/2 of whats here. I'm looking for shortcuts to the specific info I've noted.
Perhaps there should be an area of the forum for people who are still learning, where they could ask questions and get helpfull answers.
I understand that you and many others here are sick of the same questions over & over, and would prefer a forum where you only deal with new and interesting problems.
If buying a MegaSquirt, installing it and using it require reading thousands of pages of information then perhaps it's not for me. I had hoped that reading what I did, then asking a few question would help me make a decision. You seem to suggest that "there is a link here to all knowledge about the MS. Read it".
Btw, what link were you refering to? I don't see an obvious answer to any of my questions in the title of any of your links.

Thanks
Vince
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Old 03-11-2008, 01:13 AM   #5
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Originally Posted by paul View Post
get an MSI.

have Scott or Chad build it.

https://www.miataturbo.net/forum/showthread.php?t=13676




a parallel MSI controls fuel and spark

a standalone MSI can be made to control idle and fans

the MSPNP is a standalone that controls your idle, your fans, and AC in addition to all the things a parallel MS does.
Paul, I thought I'd read that to keep the A/C you need to retain the factory ECU. When I talked to a friend with a MS installed he thought I could delete the Factory ECU but would have idle problems due to the load of the A/C.
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Old 03-11-2008, 01:15 AM   #6
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You dont see the link that says DIY MS How-To ???

Click that one, if you can't figure it out from that how-to then it really isn't for you because pretty much everything from wiping your own *** when you're done is covered.
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Old 03-11-2008, 01:41 AM   #7
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Oh that link.
Yup, 6 pages on how to build from scratch & overcome various problems.
Thanks for your help but as I mentioned I don't want to build my own board.
Vince
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Old 03-11-2008, 01:45 AM   #8
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Then buy the MSPNP from diyautotune and be done with it please.
http://www.megasquirtpnp.com/
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Old 03-11-2008, 01:45 AM   #9
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wow, i thought i was blind.

you know that first page has the diagrams on how to make the wiring...right?
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Old 03-11-2008, 01:49 AM   #10
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Quote:
Originally Posted by StarGehzer View Post
Paul, I thought I'd read that to keep the A/C you need to retain the factory ECU. When I talked to a friend with a MS installed he thought I could delete the Factory ECU but would have idle problems due to the load of the A/C.

DIY Makes the MSPNP which handles the AC and idle as a standalone. You unplug your stock ECU, plug in the MSPNP, connect a vacuum line to it. Calibrate some settings. No idle problems.
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Old 03-11-2008, 02:05 AM   #11
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Originally Posted by StarGehzer View Post
Perhaps there should be an area of the forum for people who are still learning, where they could ask questions and get helpfull answers.
There are several of those, except you can't post in them and only the most knowledgeable people post in them. They are called FAQs.

Quote:
Originally Posted by StarGehzer View Post
I understand that you and many others here are sick of the same questions over & over, and would prefer a forum where you only deal with new and interesting problems.
We do prefer that type of forum; it's why we all hang out here. You'll notice that most of us are HIGHLY intolerant of newbies asking questions that are covered in the FAQs, and you are very dangerously close to that category right now.


Quote:
Originally Posted by StarGehzer View Post
I've been reading for weeks and I probably haven't covered 1/2 of whats here.
Looks like you have some reading to do, then. We aren't going to spoon-feed you this information; it's all in the FAQs or in the MegaManual. You need to help yourself.
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