gutted Cat & replaced FPR

Started by GPChief, May 30, 2006, 03:00:15 AM

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GPChief

May 30, 2006, 03:00:15 AM
This weekend I was able to work on my car, I gutted the Cat, it was 3/4 clogged.  I also replaced the FPR & EGR.  What a difference no idle issues going up and down - just smooth :icon_biggrin:

Just curious, after others have done this did boost go down? I am only seeing 4 LBS now. 

2004 GTP -  3.8 Blown - Only modding for MPG.
1997 GTP  - 3.8 Blown - Too many mods to list.
1996 GTP - 3.4 DOHC - Twin to my 1997.
1995 SE - soon to be a 3.8 turbo car.
1990 TSTE x 2 white cloth
1990 TSTE x 1 maroon leather
1990 TGP - 5 speed.

TGPilot

#1
May 30, 2006, 08:31:22 AM
With the increased exhaust flow you are probably taxing the W/G actuator to a point it is opening from backpressure. ONLY AS A TEST...wire the Wastegate closed with some Military Spec safety wire ;) and see if your boost increases.

If it does increase then check how are you running the pressure line to the W/G solenoid and actuator? 4 lbs is what the wastegate actuator preload is. I have never checked...but maybe the solenoid is normally open and you did not plug it back in allowing for free flow through the solenoid back to the actuator?

GPChief

#2
May 30, 2006, 11:53:52 PM
This A.M. driving to work I hit full boost.  Ran the rest of the storage fuel out of it yesterday and found a shell station that sold 92 octane and filled it up.  I fugure it was the old gas & sitting for a year and a half.
2004 GTP -  3.8 Blown - Only modding for MPG.
1997 GTP  - 3.8 Blown - Too many mods to list.
1996 GTP - 3.4 DOHC - Twin to my 1997.
1995 SE - soon to be a 3.8 turbo car.
1990 TSTE x 2 white cloth
1990 TSTE x 1 maroon leather
1990 TGP - 5 speed.

TGPilot

#3
May 31, 2006, 08:48:44 AM
Maybe she was still sleepy when you first drove it...now she is awake and ready to go! ;)
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