Tapped into the - wire from a fuel injector for

[hotmustang331]

my Eboost 2's RPM signal wire. Is this and ok thing to do? I had tapped into the - wire from one of my COPs, but apparently our ignition is a CD type. I was getting random readings from 500RPM to 30,000, so that didnt work. So I remembered someone on here saying that you can use the - wire thats coming from a fuel injector. Spliced into that wire on cylinder # 8 (again not the hot/red wire) and the RPM function is working normally....just had to tell it my engines a 1 cylinder motor because its only looking at one cylinder.

So is this going to cause ANY problems with the injector or lean/richness of that cylinder due to the EEC not seeing enough return voltage or something crazy like that? Just want to make sure because the LAST thing I need is a lean cylinder under boost .


BTW I have NO idea where the RPM signal wire that supposedly comes from the EEC is located or I would have used that.

 

[BennyBlown2v]

It should be fine, that's what they use at the dyno. Good luck, when is the dyno appointment again?

 

[hotmustang331]

Awsome! Makes me feel better...thanks.

March 19th! Im stoked! We leave this Sunday...so almost everything is inorder. Video camera goes in the car saturday night....so yea I forgot to get you guys a vid this week, but ill get one on the dyno and hopefully have some fun on the way back.

 

[Mike97gt]

It should be fine, that's what they use at the dyno. Good luck, when is the dyno appointment again?

+1 you will be fine unless you really badly botched your connections.

 

[thomas91169]

i would think if your ecu saw a injector was not sending back the correct signal output it would think the injector was dead/dying and pull a code.

 

[the98stang]

You are fine. I used that same wire with my window switch.

Can't wait to see your numbers!

 

[hotmustang331]

Great! Thanks all for the responces! One less thing to worry about haha.