98' GS-X boosts fine but no power fouled plugs

[bottlefedb16]

The car is a 98' GS-X DSM. Only mod.'s are upgraded greddy intercooler piping , Greddy BOV ran back into the instake like stock , intake , and a 3" thermal exhaust with a 2 1/2" down pipe and a high flow cat. The car boost fine and holds pressure but the car feels like it had no power and keeps fouling plugs I pulled the plugs and the base of the plug is black and the tips are white and you can smell fuel on them like it's running too rich. Here's a list of the things I've checked or replaced :
- 02 sensor has been replaced /
-I've tried swaping MAF sensor with another car, no difference
-Changed plugs and wire.
-Checked the resitance to each terminal for the coil packs and they're are with in normal range. and nothing is arching.
-took Cat. converter off to make sure it wasn't clogged and it's fine.
-Timing belt HAS NOT Jumped marks are on.
-Swaped out cam angle sensor,no difference.
-Swaped out fuel pressure regulator,no difference
-check all injectors resitance with a volt meter injectors are fine.
-Fuel filter was changed recently.
-Like I said car boost and holds fine so I can't find any boost leaks.

I'm open to any suggestions. I didn't just go out and buy parts I have alot of turbo DSM parts sitting around my shop so thats why I was able to just swap parts out.

 

[c5chris]

Check your intercooler couplers. They have a habit of popping and the results will be no power and a rich a/f mixture. check the one that connects the I/C to the UICP, usually that is the culprit.

Is there a CEL?

 

[karbon]

Because it boosts is not a good reason for it to have no boost leaks. The turbo just has to work harder to maintain the same boost level. Make or buy an intake leak tester to properly test the system. Also what is your fuel pressure?

 

[bottlefedb16]

I have a stuart warner FP gauge but you have to tap into the feed line to read it and DSM's have that funny flange so I'd have to make a adapter or cut the line and T into it unless there's another way. There is a no visible CEL's meanig no lights in the gauge cluster but my snap on scan tool won't communicate with the ECU or any other DSM for some reason even though I have the Chrysl. DSM adapter. I'm in the process of trying to make the tester using a air tank to test the intake but it's hard to leave and go get the parts. Thanks for all your guys input.

 

[bottlefedb16]

ok just did the pressure test for those people that work in shops like I do and do alot of spring or suspension installs this is what I use and worked great the shocks/struts that use a metal sleeve I use that for the tube and opened up the hole for the shock shaft alittle and put the valve there and used a old DSM i/c pipe to connect the tube to the turbo. First leak I found was the vacuum line going from the valve to the FPR. after that no more leaks I filled up the system up to 20lbs and then took the air line off. the pressure very slowly drops down. is it suppose to slowly drop ? I can't hear anything else leaking

 

[bottlefedb16]

Problem fixed thanks guys it was a broken vacuum line going to the fuel pressure regulator thanks everyone