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Old 05-26-2008, 03:40 AM   #1
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Default 97 turbo ms1ns issues

hello, i have built a ms1 v3.0 board with the braineack tutorial(thank you for guidance). however i have ran into a slight snag in the install process. i am getting no spark, and the LED's on the MS are not lighting as well during cranking(they do have 5 volts though?) and i have discovered that the stock mitsu igniter is non functional( i tried it on another miata:( ) the car has a pair of Gm coil packs from the previous owner, i think i have them wired correct( switched 12v into one side of the coil and apply ground to the other terminal gets spark..weak...but its spark.

a little background....

Car had a Halktek E6k installed on it with "custom turbo system" , never did run quite right and got around 6 mpg in the city. i heard of the megasquirt via GRM, and here we are.

the wiring is pretty hacked up, so wired everything new to the relay board, just to start fresh. No AC, aftermarket fans(w/ controller)

thank you to anyone that can help me, my faith is strong in the MS

it
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Old 05-26-2008, 12:11 PM   #2
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Did you flash the firmware onto the megasquirt with the coils still connected? If you are getting weak spark you probably blew ur coils out.

As for the lights not going on, well that could be incorrectly flashed firmware as well.
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Old 05-26-2008, 09:59 PM   #3
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any ideas why the leds would not be lighing up?
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Old 05-26-2008, 10:47 PM   #4
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Improperly flashed firmware.
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Old 05-26-2008, 10:58 PM   #5
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+1 Reload your firmware and MSQ and report back.
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Old 05-26-2008, 11:07 PM   #6
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any ideas why the leds would not be lighing up?
If your LEDS are installed backwards they won't light up...
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Old 05-27-2008, 11:20 AM   #7
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5 vdc on the short pin side(southern leg of the diode), ill try the firmware reflash tonight.

thank you
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Old 05-27-2008, 11:58 AM   #8
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Short leg side of the diode? positive should be the long leg of an LED.
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Old 05-27-2008, 02:01 PM   #9
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on the v3 board the pos of the D14 is towards the serial connector or at least that what i thought.

thank you for the feedback.
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Old 05-27-2008, 03:11 PM   #10
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flat/short side of the LED is towards the serial....

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Old 05-28-2008, 01:34 AM   #11
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i now have spark, thankyou to all that responded.

new problem, no fuel.....i show 12 volts on the injector wire in respect to ground but nothing when cranking on the other injector wire.

does anyone know what transistors run the injectors, so i can double check the board.

in addition the fuel pump does not run when wired correctly, i checked the fuel pump operation by applying 12 v and it does work.

i checked the fuse on the relay board, just fine.....

thank you for the continued help
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Old 05-28-2008, 11:15 AM   #12
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I think you have to jump the fuel pump in the diag box, or else the MS wont enable it.
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Old 05-28-2008, 11:40 AM   #13
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a 97 doesn't need to jump the F/P. Simply running the F/P ground wire to 2T should do it.

if no RPM signal, no fuel.
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Old 05-28-2008, 03:36 PM   #14
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i do have a rpm signal, when cranking it shows up anywhere 100 to 300 rpm, with the leds alternating on and off.

what do you mean by 2T? on the diagnostic connector?
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Old 05-28-2008, 03:39 PM   #15
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2T on the ECU harness. Light Green Wire.
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Old 05-28-2008, 03:43 PM   #16
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thank you, but i have found that the pump is working when i power it off 12v. it just will not work when hooked up to the appropriate spot on the relay board.
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Old 05-28-2008, 03:44 PM   #17
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Quote:
Originally Posted by jamiemiller View Post
new problem, no fuel.....i show 12 volts on the injector wire in respect to ground but nothing when cranking on the other injector wire.
I'm slightly unclear on this statement, specifically the difference between "the injector wire" and "the other injector wire". Are you saying that you see +12 on the white/red wire that feeds the injectors, or that you see +12 on the wires (Y, Y/B, G, G/W) between the injector and the MS?

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does anyone know what transistors run the injectors, so i can double check the board.
I think that the schematic for the 3.57 uses the same component numbers as the 3.0, so you'd be looking at page 4 of the schematic. Q1 is the primary driver for channel A, with Q14 / R37 acting as the overcurrent safety. Q5 is the driver for channel B, with Q15 / R38 acting as the overcurrent protection.
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Old 05-28-2008, 03:54 PM   #18
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thank you, but i have found that the pump is working when i power it off 12v. it just will not work when hooked up to the appropriate spot on the relay board.
The factory ecu harness gives the FP 12v. To turn it on, we trigger the ground at 2T through the provided standard output on MS. It couldn't be easier.
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Old 05-28-2008, 03:54 PM   #19
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thanks for the info joe, i had to run all new wiring in this car, so original wire colors are out the window. i had ran all new wiring to the injectors, 2 for bank one and 2 for bank two, and four common 12v to the relay board. as i understood, the MS modulates the ground channels to operate the injectors. which made sense considering how the relay board was laid out. How i tested them, i checked the 12v inj on the relay board to chassis ground and saw 12vdc. when i checked the inj1 and inj2 wiring i showed no change when cranking or at rest.

thank you for your help,
Jamie....
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Old 05-28-2008, 03:55 PM   #20
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thank you braineack, ill try that tonight
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