Last Ditch Effort Before I Say "Screw it"/Rough Ru
Posted: Thu Nov 03, 2005 4:03 pm
I will spare you all the other stuff that I have tried and didn't help.
First the car: 1992 Legacy Sport Sedan 2.2l Turbo , engine completely stock. Now my girlfriends, she is driving my winter beater and I want it back.
Next the Problem: Rough running, no power, bucking when gassed, won't rev past 3000 RPM
What I have found: It appears to be somewhere in the 3rd cyl fuel injector system. The #3 cyl injector will not inject the fuel.
How I came to this conclusion what I have tested:
-Replaced the computer(ecu)- no change in performance.
- I switched the cyl 3 and 4 injectors problem stayed at cyl 3 so its not the injector itself.
- Switched the cyl 1 and 3 wiring harness (cyl 1 harness to cyl 3 injector and vice versa) problem moved to cyl 1 so its def not the injector/block ground (if it exists)
- Pulled the injector plug on each and every injector one at a time, each time the car ran worse except for when I pulled cyl 3. also got a check engine light and code for each injector EXCEPT cyl 3.
So far everything points to the harness being bad, Now the fun part. I checked the harness based on the fsm directions everything checked out fine. Also did my own continuity checks and those checked out also.
Now I am at a loss. What are the chances of buying a used ecu with the exact same problems as the one I already have? Could some strange short in the wire ruin the ecu? Why won't it throw a code when I pull the #3 injector plug? Is there anything else between the ecu and the injector that I missed?
IS THERE ANYTHING ELSE I CAN CHECK?!?!?
Is anyone near Mankato, MN that would be willing to give me a hand in exchange for some good food and beer? perhaps with a Turbo motor car so I can check if both of my ecus are infact bad or good?
Please help me. I am desperate and out of ideas.
Jay
PS. as a last ditch effort would it be possible to split the harness for a different injector and use the signal for both cylinders, I know the timing of the fuel injection would be off but would it be close enough to work?
First the car: 1992 Legacy Sport Sedan 2.2l Turbo , engine completely stock. Now my girlfriends, she is driving my winter beater and I want it back.
Next the Problem: Rough running, no power, bucking when gassed, won't rev past 3000 RPM
What I have found: It appears to be somewhere in the 3rd cyl fuel injector system. The #3 cyl injector will not inject the fuel.
How I came to this conclusion what I have tested:
-Replaced the computer(ecu)- no change in performance.
- I switched the cyl 3 and 4 injectors problem stayed at cyl 3 so its not the injector itself.
- Switched the cyl 1 and 3 wiring harness (cyl 1 harness to cyl 3 injector and vice versa) problem moved to cyl 1 so its def not the injector/block ground (if it exists)
- Pulled the injector plug on each and every injector one at a time, each time the car ran worse except for when I pulled cyl 3. also got a check engine light and code for each injector EXCEPT cyl 3.
So far everything points to the harness being bad, Now the fun part. I checked the harness based on the fsm directions everything checked out fine. Also did my own continuity checks and those checked out also.
Now I am at a loss. What are the chances of buying a used ecu with the exact same problems as the one I already have? Could some strange short in the wire ruin the ecu? Why won't it throw a code when I pull the #3 injector plug? Is there anything else between the ecu and the injector that I missed?
IS THERE ANYTHING ELSE I CAN CHECK?!?!?
Is anyone near Mankato, MN that would be willing to give me a hand in exchange for some good food and beer? perhaps with a Turbo motor car so I can check if both of my ecus are infact bad or good?
Please help me. I am desperate and out of ideas.
Jay
PS. as a last ditch effort would it be possible to split the harness for a different injector and use the signal for both cylinders, I know the timing of the fuel injection would be off but would it be close enough to work?