EFI University

iloveuall · Joined: 04 Apr 2009 Posts: 4

i have a megasquirt v2.2 that i am installing on a 92 gmc typhoon. truck has a standard gm style distributer with a 7 pin ignition control module. basically what i am looking 4 is a start up cal 4 the ignition isde of things. sorry in advance for my lac of info! thanx in advance for any one with help! truck has a 70 mm turbo 65 lb hr injectors,68psi base fuel pressure.

Matt Cramer · Joined: 25 Sep 2007 Posts: 278

One thing to remember is maps don't cross over between code versions, so even if you get a map for your engine, if it was for a Megasquirt-II and yours is a I, you will only be able to pry some bits and pieces out of the map instead of loading the whole thing. You may be able to find some work done on this engine in the MSRuns.com forum, but chances are your best bet will be to work out your own start up map. I can point you to where you can get the information to do that with if you let me know what code you are running.
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Matt at DIY Autotune

iloveuall · Joined: 04 Apr 2009 Posts: 4

hey matt thanx for the response. i have a megasquirt 2 v2.2 i am looking for trigger setup. and a couple other Qs i cant seem to fingd the awnser to on the other forums. i have a box assembled by rs auto sport that is marked neon 420a and i am using a 7 pin hei ? do changes inside the box need to be made? it also says msnspark extra ms2-0267 ? any help would be great.

Matt Cramer · Joined: 25 Sep 2007 Posts: 278

This one is likely to be running MS2/Extra code, so you'll want to look here:

http://www.msextra.com/ms2extra/

This section covers how to make a startup map:

http://www.msextra.com/ms2extra/MS2-Extra_Tuning_Manual.html#start_idle

It's likely to need some changes to work with HEI.
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Matt at DIY Autotune

iloveuall · Joined: 04 Apr 2009 Posts: 4

i understand that hardware might need to be changed but that is my ?

Matt Cramer · Joined: 25 Sep 2007 Posts: 278

It's hard to say as I don't have a complete description of what Rodney did with the 420A setup. Could you post pictures of the MS with the case off?
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Matt at DIY Autotune

iloveuall · Joined: 04 Apr 2009 Posts: 4

will do matt. thanx 4 responding. i took the cover off and took a look at the board and the jumpers and everything looks set up right. i made a jumper harness to put it in the truck without any mods to the stock harness. i pluged it in last night it powered up but i could not connect to it with megatune? will post a pic later of the board. thanx again !

Matt Cramer · Joined: 25 Sep 2007 Posts: 278

Time to see if something besides MegaTune will connect. To do this check, you'll need the program portcheck.exe, which comes with most MegaTune versions, including the one on the DIYAutotune.com website. You'll find it in the MegaTune2.25 folder. If you don't have a copy, download it here:

http://www.diyautotune.com/downloads/tuning_software/portCheck.zip

Power up the Megasquirt and connect it to your PC. You do not need to open the case and should not put the boot jumper in place for this test. Close MegaTune if it's running, and run the portcheck.exe program. When this program starts, it will scan the available COM ports.

If the port it's scanning is not connected to a working Megasquirt, or it's on the wrong speed, it'll say "No connection made." If it's on the right port and right speed, it will give you the version of the Megasquirt firmware that's on the Megasquirt. Note that some Megasquirt firmware versions will look like earlier versions with this test - for example, 029V identifies it as 029Q. This is for backwards compatibility.

If you get a port where it replies with "S" or something else that doesn't look like a firmware version, this port is probably a fake COM port that echos back everything that's typed.
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Matt at DIY Autotune