2 cylinders not fireing? please help

[Mayday0017]

Engine is only running off first 2 cylinders after engine swap. Checked timing, perfect. Checked plug wires and swapped with known good still nothing. Swapped plugs from rear two cylinders that arn't working with front two that are no difference. Swapped known good fuel rail with known good injectors. Still no difference. Used a multimeter and checked voltage from computer to injector at injector harness all showed aprox 1 volt. Car has new fuel pump and filter also. All plugs are getting spark. What else is there to check? Can two injectors be getting fuel and two injectors not? How can I tell for SURE that the rear two are even feeding fuel? Please give any suggestions possible I am really lost at this point.

[logik23]

Is it me or are you really not lucky? I mean you had these problems with the last engine, you couldn't sell the car and now that you've swapped the engine, the problems are starting all over again....Can't you just take out an injector and check if fuel comes out?

[nissanfanatic]

I would check the compression in the back two. And make sure the injector insulator thingies(the little black rubber donuts) seal up with the injectors good. I would also check out the o rings.

To test if the injector o rings are good, hook up the feed and return lines to the fuel rail. Leave the fuel rail turn the key to the on position. The fuel pump shuts off after like 5 seconds if it doesn't detect 180* of crank rotation. To see if they work, haev someone crank the car over a few times with the same setup you had to see if they leaked and watch them to see if they spray. ******Keep a rag under the injectors during each test. If not, fuel is going to go everywhere if the o rings aren't sealed and/or when you test the injectors themselves.

[Mayday0017]

I am stupid, no problems at all.... dad thought he would help and changed the order of my plug wires on the distributor and I assumed they were the same way I had left them last weekend.... Don't you love when people play with your toys? Engine swap was a success runs perfect better then my daily driver.

[nissanfanatic]

Nice easy fix huh? Good luck with your new engine.