1990 pathfinder no start

[Stevenchevy1992]

Just bought my first nissan a couple weeks ago bought it and it ran really rough (low idle around 300 400 ) so i changed idle air control valve with one from junk yard that was working now it doesnt start at all it floods right away if i pull fuel pump relay it will fire and run till its out of gas then if i plug relay back it starts for about 2 seconds and dies and is flooded again i have check all the easy stuff regulator plugs injectors arent stuck open they do pulse

[snowboard419]

When you pull the relay and it runs does it run well or still rough? If it runs well I would think leaking injector/s if still rough I would look at ignition timing. First things I would check would be good spark, timing, compression, We know your getting fuel just perhaps too much. And definitely check those 3 before you purchase any parts because not doing so has bit me in the ass big time a few times.

[Stevenchevy1992]

Its has good spark when it starts it runs on all 6 just still idles low ill have to check compression if i open up the intake butterfly with the screw on the bottom it will run at 2000 rpm

[Stevenchevy1992]

Has good compression i can get it to run if i turn in thr screw on the butterfly

[Citron]

You can try cleaning the MAF and throttle body and see if that helps. Have you checked for codes?

[Stevenchevy1992]

I tried another maf sensor from junk yard off a running one still been same results also have a question as to what the valve is on the back driver side of intake im guessing it has something to do with air intake but not sure