Today, I checked voltage at each injector plug wire connector and they were all within a few .10th/volts of each other. I ruled out a faulty connector by doing that. I then check it with the motor running and pretty much the same result but just at a higher voltage for all of them.
Thereafter, I drove it to meet my friend who works at a salvage yard. He said he had a 93/94 NA Legacy motor on hand so maybe I can grab the injectors from it. However, on the way there the engine began to run normal again (all cylinders firing). Then, something I noticed after I stopped at a traffic light was that it was a little rough compared to normal idle though.
So I tell my friend to let me see the motor and it's got red injectors rather than black like the ones that are in my '90 AT LS AWD model. I remember seeing in a pdf that the AT injectors are different than the MT ones. SO I said thanks but they won't work with the basic ECU that I've got.
So I've got three questions. 1.) Is the injector likely getting lazy? Again it was not working at all and after driving it, it began to work again (but not perfect). It stopped working again just a moment ago after going WOT toi redline. Then I turned the car off and after starting it again was almost okay with the slightly missing idle. 2.) Are those red injectors from that 93/94 Legacy from an MT or AT? Can they work? 3.) I've got access to an '02 Forester complete manifold. The injectors are top feed but I wonder if the entire manifold harnesses would be a direct fit?
Sorry guys I'm at a bit of a loss with these more vintage Subarus, not to mention OBD1 LOL!
P.S. I spliced in an extra WRX knock sensor that I had with the original Legacy sensor connector and it works perfectly.
I may bump up the static rail pressure a little. Seems that it is a little more flat now under WOT as the rpms go up. Where the beige ones seemed to pull a little better. The injectors are rated the same flow rate but have slightly different bottom designs.