Relay board injectors

For discussing how to choose sensors and create a wiring harness for all Bowling and Grippo versions of the MegaSquirt® EFI controller.
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dart73
MegaSquirt Newbie
Posts: 7
Joined: Tue Sep 21, 2004 10:12 am
Location: Brazil

Relay board injectors

Post by dart73 »

Hi,

I have a question regarding the relay board. I have a V8 with 2x4 injectors bbench (1 for each cylinder). I have wired it to INJ1/INJ2 in relay board and INJ2 was not working.

I realized that there´s INJ1/INJ1/INJ2/INJ2 in the board so when I pluged INJ1/INJ1 both benchs worked. Is this correct?


Regards,
1973 Brasilian Dart megasquirted
trakkies
Super Squirter
Posts: 1162
Joined: Tue Dec 30, 2008 3:06 am
Location: SW London, UK

Re: Relay board injectors

Post by trakkies »

There are two injector drivers inside MS. Each one goes to two terminals on the DB37 connector. Inj1 to 32&33, Inj2 to 34&35. Two terminals are needed as the maximum current can exceed what one DB37 pin can handle.
Dave P, London UK.
Rover V-8
MSII V3
EDIS
Tech Edge Wideband
dart73
MegaSquirt Newbie
Posts: 7
Joined: Tue Sep 21, 2004 10:12 am
Location: Brazil

Re: Relay board injectors

Post by dart73 »

Ok,

so if my INJ2 was not working this could be due to a burnt transistor? Which one drives INJ2? Know the circuit part number?


- Maybe if I turn 8 injector into 1 drive this could burn this transistor algo correct? Too much current...

Regds,
1973 Brasilian Dart megasquirted
trakkies
Super Squirter
Posts: 1162
Joined: Tue Dec 30, 2008 3:06 am
Location: SW London, UK

Re: Relay board injectors

Post by trakkies »

There are schematics for all the various PCBs in the manual. Refer to the appropriate one and find the injector drivers. That gives the component number and part number.
Dave P, London UK.
Rover V-8
MSII V3
EDIS
Tech Edge Wideband
dart73
MegaSquirt Newbie
Posts: 7
Joined: Tue Sep 21, 2004 10:12 am
Location: Brazil

Re: Relay board injectors

Post by dart73 »

Hi all,

Thanks for your input. Q7 had a broken pin. Soldered and its working.

Rgds,
1973 Brasilian Dart megasquirted
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