hey guys, I need some help identifying a faulty clip or connection.

only one of the injector clips on the primary rail is spitting out fuel, when i swap clips it does the same

so Its not a faulty injector, cuz i just had them cleaned too,

its one of the clips but how do i confirm that,

 

It is not a clip.The clip is electrical.
So it would have to be a grommet or an Oring on the injector.

 

i dont think so, when i swap the working clip to the other injector it fires,

 

I think there's a misunderstanding of the meaning of "spitting out fuel".

There should be a procedure to check the injector signal in the FSM as well as the resistors if your car has them.

 

a clip is an electrical connection. no spitting of fuel.

now, if there is fuel, its an injector oring or grommet. i had this happen to me before. no fun.

 

Yeah let me clarify, only one of the injectors is firing. When i switch the electrical connection clips the other injector fires. So i guessing theres a faulty clip not getting a signal.

 

You can get four Bosch EV1 style fuel injector clips on eBay for CHEAP. (These will work for the series four fuel injectors.)

Check the ECU pins associated with fuel injectors. It will help to clarify which series you're dealing with.

 

If the wiring connector off the one injector that is not firing is switched and is able to fire the "other " injector then I would look the the "non firing" injector as faulty. It could have a bent pin at the connector,or just had the biscuit( shot).

 

the injectors have been freshly cleaned

 

Who serviced them?

 

I think we can eliminate the injectors as an issue.

I would check the clip that does not work. Look for bent or broken connectors in it.

Ring it out with your DMM (check for continuity). It should be pins 3H and 3F. 3H is the front secondary.

 

check for voltage off the black wires with the key to on. connect the injectors and then you can watch the voltage at the green wires connected to the ECU end, the faulty wiring injector will likely drop to near 0v when cranking.

do a resistance check on that one driver wire to the clip and also to ground as it may be cross feeding. the junctions also fail, as mazda simply stripped the wires that feed voltage to the injectors off the black wires, these simple brass crimps can become corroded and cause a lack of amperage through the junctioned circuit.

 

Wiring on 20+ year old high temp producing wankel engines can be pretty toasty and brittle. I'll bet in moving the wires around R&R-ing the injectors one of the wires broke somewhere between the injector clip and the harness it runs to.

 

unless the car came from back east i doubt it is a crimp junction, more likely an injector clip due to age and a simple bad connection.

be sure to look at the pin end inside the clips, tug on the wires a little and see if one pulls out more than the few mm that the others do.

 

The only reason I ask is because... "the injectors have been freshly cleaned" could translate to "I put injector cleaner in the gas tank."

It definitely seems like a wiring issue... Just figured I'd ask.

 

he did say earlier he swapped the wiring between the injectors and the problem followed the wiring so i'd also rule out the injectors.