Installed Walbro 255, AFPR, and 750cc, car wont hold boost

[Kiwi]

I just installed the Walbro 255, AFPR, and 750cc injectors, and set the idle with the vacuum line off at 43.5 PSI (it is a 1998 GSX). Before I installed everything I had no boost leak and no trouble at all going to 15 PSI of boost. However, now I read the gauge as going up to 16 psi of boost, but the car dosent really go anywhere, or accelerate at all. I know it is a tuning problem and I am going to get a wideband 02 sensor and DSMlink, but for now I just wanted to know what is wrong. I know that my fuel pressure should increase 1:1 with boost, but it is either running too lean or too rich. ,and I am wondering if anybody knows if I should adjust idle fuel pressure, or what may be happening.

I did a lot of research and all I gathered was that it should be at 43.5 psi and my fuel system should be able to handle the 61.5 psi I want it too, and that seemed to clear up most people's problems who didnt have any afpr or who were setting it incorrectly or what not.

 

[TSITurbo95]

Firstly, you should not install injectors without a way to dial them in. That is your problem, your car is running maaaaaaaaaaaad rich. Install the stockers until you get the correct tuning platform (dsmlink)

 

[kchaazz]

The problem is that you put those huge injectors in with no way to compensate for them. The motor is running extremely rich. You must put the stock injectors back in right away before you wash the cylinders and contaminate your oil with fuel to the point of destroying the motor. When you put the 450cc injectors back in, you should go ahead and change your oil immediately and be done with it.

Edit^ What he said

 

[MY1GDSM]

As said you need a way to compensate for the Extra Fuel you juat added

You can just Flash your Stock Ecu for the Injectors with an Openport 2.0 being you have 98-99 Ecu or use some other form of Engine management to accomplish this... .

 

[Kiwi]

Okay, thanks guys. I will switch out to stock injectors asap, and wait until I can get a tuning system.

 

[n0de]

How the hell did he even get the car to start without a tuning solution? put 550's in my 1g and reset the dsmlink to factory, the car maybe barely starts let along drive.