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if your megasquirt only ran on 2 cylinders, what would you check?

Old May 13, 2011 | 08:40 AM
  #21  
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the mods look done correctly.

one the harness, make sure the brown and white/green wire labeled ignitor goes back to these spots:





If they do, make sure the white/green wire that's labled pin 31, acutally goes back to pin 31 on the db37 side of the harness. If it doesn't, check to see if pin 31 is acutally going to position 1V on the harness connector labled Clutch.
Old May 13, 2011 | 05:13 PM
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okay. i've never really dealt with wiring diagrams and pinouts but....

as far as i can tell, the white/green wire in 1G on the car side of the harness goes to pin 26 on the MS side. the brown wire in 1H goes to pin 21. the green/white wire labeled clutch in 1V goes to pin 28.


this is from my dumb *** looking at the picture you posted here, and this pic in your MS tutorial

Old May 16, 2011 | 05:22 PM
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anyone else have any ideas?
Old May 16, 2011 | 05:56 PM
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ok, so to make this simple ill list the wires from pin 20 to 37

your post above has a few of them mixed up, see bold items


20- 2P
21- 2Q
22- 2L
23- WB/2N
24- 2E
25- 2G
26- 1N
27- 1R
28- 1B
29- 1V
30- 2w
31- 1G
32/33- 2v
34/35- 2U
36- 1w
37- fuel pump
Old May 16, 2011 | 06:53 PM
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left to right:

brown, green to 2 pins, blue 2 pins, white/green, green, green/white, red, black, grey, white/blue, white, pink, blue, yellow, orange

the other row of pins are all black, grounds i assume
Old May 16, 2011 | 10:46 PM
  #26  
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unless you brought the 2nd ign trigger out on a different wire you have it wrong, should be black, brown, big green, big blue, green/white, green, white/green, red, white/blue, gray, blue/white, white, pink, blue, yellow, orange


this is assuming your using the default colors as well
Old May 17, 2011 | 08:31 AM
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you cant go by the color. you have to follow them back to the pin on the yellow connector.
Old May 18, 2011 | 10:18 PM
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Originally Posted by Braineack
you cant go by the color. you have to follow them back to the pin on the yellow connector.
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Old May 20, 2011 | 05:35 PM
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looking at this pic, my harness seems backwards.



is my harness good or no?
Old May 20, 2011 | 05:37 PM
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Fine if you are looking at the connector from the wire (harness) side, not from the plug side.
Old May 20, 2011 | 05:42 PM
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Originally Posted by Reverant
Fine if you are looking at the connector from the wire (harness) side, not from the plug side.


so my harness is correct?
Old May 20, 2011 | 05:43 PM
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im assuming the black unlabeled wire goes to 1P?

everything related to spark looks correct from here.
Old May 20, 2011 | 05:50 PM
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Originally Posted by Braineack
im assuming the black unlabeled wire goes to 1P?

everything related to spark looks correct from here.
1p is not used. all the black wires go to 2a-d
Old May 20, 2011 | 06:41 PM
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(zack morris's phone)

the blacks between 1b red and 1n gray does as well? Not that it should matter for spark. Which set of plugs did you say wouldn't fire?
Old May 20, 2011 | 07:46 PM
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Originally Posted by Braineack
(zack morris's phone)

the blacks between 1b red and 1n gray does as well? Not that it should matter for spark. Which set of plugs did you say wouldn't fire?
I haven't traced the wire, but the only black on the car side are six i believe in 2a–d, and one that connects two pins on the yellow harness.


No spark on two and three
Old May 23, 2011 | 10:13 PM
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Originally Posted by DrewLGT
I haven't traced the wire, but the only black on the car side are six i believe in 2a–d, and one that connects two pins on the yellow harness.


No spark on two and three
.
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