I NEED SOME HELP!!!

[RBinside]

Alright hows everybody doin out there. I am new to doing this hole forum thing . I am lookin for some advice and heard this was the place to come. I recently swapped an RB25 into my 94 nissan d21 pickup. I love it. I just have a couple of questions cause this is starting to get expensive. Its pretty much a stock RB except for a 91mm throttle body, greddy intake manifold, blow off, and the FMIC setup. I have the stock RB25 ecu. Its been giving me alot of problems breaking up in low rpms. I have played with a wide range of spark plugs. It will fix the problem for a little bit then it goes right back to the same old song and dance. This is also my first turbo motor. I figured if i was gonna do it mind as well do it right. So i guess what i wana kno is what kinda problems seem to be the most common when swapping these motors? What kinds of engine management does everybody reccomend? I appreciate any insight anybody wants to give. Any advice as far as making more power and the steps i should be taking to get there is also great. Thanks

[the converted]

Moved to RB forum.

[WhatsADSM]

First things first check for boost leaks.

[Carl H]

did you change the fuel pump when you did the swap?

[Coolwhip]

Like Carl had mentioned... changed fuel pump?

as well, what fuel filter are you using?

and pop a fuel pressure gauge on that system and check what your engine is seeing in fuel pressure. Might very well be stupidly high.

[toadx8u]

hey man i live about 2 hrs away from you if the truck drives well enough to get to my house or if you want me to come take a look at it id be willing to check out what you got goin on

[RBinside]

I did swap out the fuel pump from the truck to the skyline fuel pump and have already put a pressure gauge on it and it is getting plenty of fuel. The plugs dont show that i am getting to much. Do u think it could be more or less the stock turbo and exhaust manifold with the bigger intercooler, throttle body and intake manifold? I have also gone back through all of my lines i did find one with a crack in it so i have checked that also. It makes a consistant like 8.5 lbs. What fuel pressure is it suppost to have. All this started like two weeks ago. i dropped the front of the truck like 2 more inches. I tucked all of my wiring harness so part of it runs inside the wheel house. the clip i had holding it up broke and i smashed my harness between my inner wheel house and my tire which broke a bunch of wires. I fixed all that and replaced the stock ecu and it hasent started since.
Modified by RBinside at 9:17 PM 10/16/2008

[USMCgetsome]

with vacuum source off set it to 43PSI. When you put the vacuum source back on it will adjust itself like 38-42 psi range.

check that then move to the boost leaks.

[RBinside]

what do u mean by vacuum source??