help with gas gauge have standalone

[nightshiftgarage]

just notcied that my gas gauge isnt working anymore, thanks to wonderful megasquirt. anyone know how to or have any ideas on how to wire it up on its own without the factory ecu. thanks

[Matt Cramer]

Post what year you've got, and whether you have a HUD if it's an S13. I'll check the wiring diagrams. On most years, the stock ECU isn't connected to the fuel gauge at all. Do all your other gauges work?

[MegasquirtCA]

Like Matt said, all the stuff on the cluster except Tach are seperate from the ECU. So megasquirt wasnt the cause it was either it failed or YOU.

It doesnt matter if its analog or HUD I've used both and they all worked fine.

[sean350z]

Megasquirt will not cause your gas guage to break...

Sounds like a wiring issue seperate from the ECU or your sender is busted.

[nightshiftgarage]

matt. its a 97 .

other dudes, i didnt think ms broke my gauge
my car had some weird electrical meltdown, thats when i decided to do ms.now i cant get the ms to communicate with the laptop. im using a usb cable to comm port.it just seems like its been one thing after another.getting a lil frustrated.

[the head]

Originally Posted by nightshiftgarage

matt. its a 97 .

other dudes, i didnt think ms broke my gauge
my car had some weird electrical meltdown, thats when i decided to do ms.now i cant get the ms to communicate with the laptop. im using a usb cable to comm port.it just seems like its been one thing after another.getting a lil frustrated.

try assignng a specific com port to the USB in your computer settings I had that issue with my Haltech initially because the USB was COM 27 on my system and the Haltech can only support single digit COM assignments.

[nightshiftgarage]

i didnt know the cable cane with a cd to load. after that its been good. still have no tach signal and or spark tho.

[Matt Cramer]

On this model, the fuel gauge just wires straight to the sending unit. Check to see if you're getting a voltage at the sending unit from the gauge.

You won't get a spark until the Megasquirt gets an RPM signal. Does the Megasquirt work on a Stim?

[nightshiftgarage]

if thats something extra, mine didnt come with that

[Matt Cramer]

Originally Posted by nightshiftgarage

if thats something extra, mine didnt come with that

It's an extra diagnostic board. Without it, the first thing to check is if it's getting a signal in at pin 24 that is going from 0 to 12 volts and back again as the distributor turns.