I've been fighting an on-going problem for a little while now. After I got my new engine broken in, I went to get it tuned, only to find that my 1300 secondary injectors weren't opening. Whenever the rpm's would get to about 5k, it would sputter and go very lean. I pulled them out and sent them to RC Engineering to get rebuilt. They found that one of them was stuck closed.

While they were gone, I checked my engine harness and got some strange continuity readings, but I got the same readings for my primary injectors, which work fine, so I decided to put it all back together and see if it runs.

I just got everything back together today and started it up. It idles at about 11:1 AFR, and when I tried to rev the engine, it wouldn't go past 4500 rpm no matter how little gas I gave it. The difference this time is that when the engine starts sputtering, my wideband reads about 12.6 AFR.

I pulled my front spark plugs and they were both a good tan color, so it doesn't seem to be that bad. I also have a Twin Power already installed.

Does this sound like ignition break up, or does it sound like I've still got the same problem. Thanks for any help you guys can give.

 

did you check the MAP sensor vacuum line to the UIM?

 

Thanks for trying to help, but the car's running fine, now. It must've just been some crud in my engine or something, because I took it out for a test drive after I posted and i ran all the way to redline with out a hiccup. Now I just gotta figure out a primary boost issue and I'll be set!

Thanks for all the help you guys have given me along the way to getting her back up and running.