Ok so my car on the way home from work all of a sudden started it started running on 3 cylinders, I was like right down the street from my house so i limped it home. anyways so I started diagnosing things and its on cylinder #4. The car kinda spits a little on cylinder #4 but its just like little pops. So the spark plug is definitely firing, and the injector has current, just I am gonna guess its the signal to the injector? Soooo anyone have any idea on where to start? I already took the harness off the car just got off work and I'm tired and having trouble thinking

 

check voltage to #4 coil pack

 

probably should get a noid light and check injector pulse.
i think a whole set of lights with the one you need and 5 you dont is only like $6 at harbor freight.

it will show if the wiring to the injector is right, compare it with the other cylinders, if its the same, try swapping #4 to a different cylinder and see if the problem moves cylinders.

 

Yea thats a good idea, unfortunately I need this shit fixed like now since I gotta drive it to work tomorrow. Already swapped injectors and coil packs so I know that is not the issue. I think I'm gonna say screw it and tear apart my whole harness and trace everything back and find it.

 

ok checked all the injector wires with an ohm meter and ripped the harness down and traced the wires and it appears all that is straight, so I guess its the signal on the coilpack, I'm guessing it was firing just not at the right time.

 

If the other 3 cylinders are firing at the right time, it's impossible for the 4th to be wrong.

This is KA?

 

This is SR hense coilpacks I've foiled your diagnosis... no dizzy

 

so the coilpack is firing and the injector has power and I tested the connections with a ohm meter and everything is how it should be so is there anyway you guys can think of to narrow down the problem to spark or fuel?

 

you have compression in cylinder 4? just saying you might wanna check to rule it out.

 

ringland / broken rocker / burned valve