Misfiring

SimplicityFB6

SimplicityFB6

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Location
Houston, Tx
Vehicle Model
Civic
Body Style
Si
Does anyone know if it matters which wire (positive or negative) goes on what side on the injector? I put negative on the right side and positive on the left side of each injector and when I turn on the car it misfires. Before all that I installed rdx injectors on the rbc manifold and the rdx injector clips came with long pigtails so I cut them so that the wires won't stick out weird. I also soddered them to the stock wires. If anyone can take a picture of their injector wires that would be great.
 
I believe the injector connectors will only clip on in one direction. A wiring diagram may help you figure out if you have a wire crossed somewhere. Is the misfire only in one cylinder or is it across the board? If you get an obd scan tool you should be able to find out.
 
Flightmaster127 said:
I believe the injector connectors will only clip on in one direction. A wiring diagram may help you figure out if you have a wire crossed somewhere. Is the misfire only in one cylinder or is it across the board? If you get an obd scan tool you should be able to find out.
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It sounds like it's misfiring more then one and can flash pro read it?
 
Is your check engine light on? If it is flash pro should be able to read any logged codes.
 
If you post the codes up here as well I'm sure others can chime in to help.
 
Turns out I'm only running on two cylinders
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Wiring diagram would be the best way to make sure they are wired correctly. But a shot in the dark is reversing your wires on the cyl 1 and 4 and see if it goes away. Also this is a personal opinion but I'd rather crimp and heat sink wires. It's a little easier to me and has a less chance to vibrate apart compared to solder.
 
I switch the positive and negative wires on injectors 1 and 4 and noticed a difference but still misfiring so I diagnosed and it said injectors 1 and 2 malfunction. I ended up buying new rdx clips and pigtails to put it back how it was hopefully it gets here Friday.
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Where are you grounding the injectors? A bad ground point can cause injectors to malfunction
 
Good point, kinda like the ground relocate for p2r thermal IM gasket. With out it you wont get a ground or poor at that.
 
Darkout said:
Good point, kinda like the ground relocate for p2r thermal IM gasket. With out it you wont get a ground or poor at that.
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323 said:
Where are you grounding the injectors? A bad ground point can cause injectors to malfunction
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I have it grounded to the manifold. I'll take pictures once I get home from work. I had it grounded there for a year with no problems but I want to see what you guys think.
 
You don't have a thermal(non metal) intake manifold gasket do you?
 
Yup, it'd probably the ground point. Follow what ^ he said
 
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