So my car when I started it up this winter, idle funny and when driving, it would go lean and cutout at roughly 3500 rpms. This didn't matter what load the car was on, it would always cutout at 3500. If I was under boost, it would cutout at 3500 then run full boost and run good all the way to 8k. I changed all I could think of before finally swapping in my buddies 2150s. Swapped his injectors in, car ran fine. I raced it the next weekend and won my class at streetcar takeover in St. Louis. Lol

So I figure it was my old dirty injectors, which had just been cleaned by the way, at fic. So I send them back to fic, they test them and say they are reading a bit low. They clean them, get the flow back to spec and send them back. I put them in my car, car sputters and cuts out at 3500 again. I take those injectors, put them in my buddies Evo, his car runs just fine with them. So I take his "dirty" injectors and put them in my car, my car runs just fine.

So my car is basically only running on my buddies dirty set of 2150s. His car runs on either set just fine. Can someone explain what could be causing this?

 

When you swap the injectors are you using the seals from his injectors or the seals from your injectors?

Regardless of the answer..... swap them too...

 

I wanna say the seals stayed in my car when injectors were swapped.

 

Sounds like a leak somewhere. Did you do a boost leak? Did you order new seals when you sent them to fic?

 

Boost leak test has been done on the car numerous times. It only wants to run when this specific set of injectors are in. Ive put them in a buddies car and his car ran just fine. His injectors dont run in my car, but run fine in his car.

 

What injectors are you running? What ecu are you running? Did you test the voltage at the injector?

 

Also any fuel pressure or afr logs?

 

Test your fuel pump. And how is your injector resistor doing? Lots of basic things to inspect. 1 st fuel pressure 2 nd voltages and ground signals etc..

 

I'm surprised no one asked this sooner.

 

Injectors are fic 2150s. Stock ecu. I have not done any voltage testing on the injectors. Does fic not doe that?
If there was a fuel pump issue, wouldn't it screw up the drive no matter what injectors are in? This car runs fine with the current injectors. I've raced on these injectors with no issues. Throw in my original injectors that have been cleaned and tested from fic, and it runs like ****. Cuts out at 3500 no matter what load is on the car.

 

He said car runs fine when he uses his buddys 2150's, pump cant be bad..

Visually inspect the rail and injectors at idle, see if you have fuel coming out of any of them, you can also tell you have a leak somewhere if that certain spot looks really clean compared to the rest of the surrounding area. if all those check out, disconnect the injectors and look at the electrical pins, maybe you have a contact issue on one of them.

basically. if the SAME injectors your bud owns run fine on your car, your problems are your set of injectors. end of story.

 

my injectors, set A, make my car run like ****. His injectors set B, my car runs great. Set A or B in his car run fine. Only set B allows my car to run. Set A have been sent to fic for cleaning and testing twice, my car won't run right with them.

I haven't seen any signs of any leaks when running set A injectors. My manifold is black, but I haven't seen or smelt any signs of leaking fuel when running set A injectors.

 

If everything else is good the sounds like an electrical issue either with the car wiring or the injectors. How did you do the wiring for the injectors? If there are solder joints after time the can break. When I last redid my harness I had weird injector issues, so I ran all brand new tefzel wire and crimped the pins on so no solder.

Or it could be on injector in the bunch. Try swapping one injector at a time maybe you have one injector that tests fine but in the real world is bad.

Did you call fic and tell the what you are seeing maybe they have some ideas.


But at the end of the day the best way to see what is going on is to test the voltage at the plug and the very best is to scope it if you have an ocilliscope laying around.

 

I have thought of all the scenarios mentioned, but if it were wiring, why would one set work jsut fine and another set the car isnt driveable through the powerband? The set that make the car not able to drive is the set that has been to FIC twice now for testing and came back with passing results. So I thought that eliminated the wiring issue. And to say one of the injectors is bad is contradicting, cause the "bad" set of injectors in my buddies evo run just fine. So to me that eliminated an injector issue lol.

FIC was working with me until I put the cleaned and tested injectors in my car the 2nd time and they made it run like poop still. I asked what would cause both sets to run just fine in my buddies car, and yet only one of them runs in my car. never got a response.

I may just ditch the 2150s all together and get some id2000s and a retune

 

https://www.evolutionm.net/forums/sa...ve-2-sets.html