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Old 04-02-2014, 12:55 PM   #38 (permalink)
jedi_sol
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Location: Tustin, CA
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2013 STi *SOLD* - '13 Subaru Impreza WRX STi
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65% confirmed? Voltage meter

Hooked up my voltage meter to an injector. Setting a baseline

Idle: 14.25v

Accelerating: voltage drops (11v-13v)

DFCO in gear: 14.36v (steady)

14.36v is my assumption that injectors are not spitting fuel because we all agree that DFCO-in-gear shuts off the fuel injectors

If I do my neutral-throttle-blip while coasting: voltage fluctuates between 13.5v, 14.36v, and 14.25v. Pretty much all voltage values show (as measured above). Therefore, my assumption is that while im on the throttle (13.5v), I step off throttle to shift to neutral (14.36v injectors shut off), rpms drop to idle (14.25v). Then as I continue to throttle blip, voltages fluctuate between 13.5v and 14.25v…then every once in a while 14.36v will flash up.

I’m sure my voltage reader refresh rate is too slow. Therefore, I slowed down my throttle blip. I drove up to 40mph, shifted into neutral, started coasting, then I rose revs up to 2000rpm and held the throttle so that the volts read a steady 13.25v. Then I released the throttle, meter shows 14.36v, then down to 14.25v (idle).

I did it again…initiated the coast….held the throttle at 2000rpm…meter shows 13.25v steady…then I step off throttle, meter shows 14.36v, then down to 14.25v (idle)

Thoughts? Comments? Suggestions?

I’m getting ready to hook up the mpguino soon. Just gotta find a 12v source….or buy extra wire to reach the car batter 
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