installed Nelson tune and 42lb injectors, runs no good??!!

ok well i just installed my nelson tune and 42lb injectors on my truck,i have two issues , one - my truck will idle fine until i apply any amount of gas even a tap then it drops to about 2-300 rpm and sometimes dies or stumbles .ive tried the idle re-learn procedure and no luck,

second- my truck has lots of hessitiation and runs horrible at open throttle or anything more than 60% throttle,

im wondering if it could be my fuel pump? im trying to locate a walboro 255 right now.any help is appreciated !

did you put new orings on the injectors or reuse the old ones? Might be a vacuum leak. Definitely check your fuel pressure. Check it while driving if possible.

Didn't disconnect the MAF, EVAP or MAP sensor did you?

I had a connector break in a MAP sensor connector once and it ran like that.

i installed new O rings provided with the injectors, and i have not touched my MAF. it has me kind of confused.

If the fuel pressure proves to be good, pull the PCM and remove the covers on the PCM connectors and look to see that all the connectors are fully seated in their sockets and didn't push back in the holder. I'd also ohm out the MAP wiring from the PCM connector to the MAP connector. Just make sure there is a solid wire and no breaks.

Not sure if you can try your old pcm or not. But when i first got my tune from nelson something happened to the tune and it did not work and my truck ran like crap. Had him send me another and the truck ran great. Might just try there.

yea im leaning more towards the computer being the problem,i think something is either wrong with it or something was flashed incorrectly. allen said he will check the tune and see if anything is wrong with it for me.
hope it will just be a simple fix.i need to drive my truck!! my girlfreinds accord is starting to feel nice for the past 2 weeks! lol first the truck was down for a week for the oil pump,then i finally got the pump on friday installed it then UPS came at 6pm that night with computer and my injectors and once again a problem. oh well its all part of the game!!!

There is no idle relearn, my bet is a failed download.

im sure allen will take care of it

ok just did a fuel pressure check and at idle is steady 60 no hesitstions at all.i havnt done it driving yet but will in a bit, whats a good PSI range for the fuel pressure specs?

Did you do a crank relearn?