I wanted to let everyone know about my discovery this evening...all to the great support of Paul at Turbosunleashed.com.
I've been chasing a lean WOT condition on my TII conversion. In addition, I've had a very shaky boost guage. At wide open throttle, the boost needle would bounce around +/- 3 psi, my A/F gauge would read lean, and my EGT would climb to 1600F as I would get off the throttle. The problem was with my vacuum routing. I had used basically one vacuum source for the fuel pressure regulator, map sensor solenoid, and wastegate solenoid. Herein lies the problem, the wastegate solenoid opening and closing created a vacuum leak, making the FPR see lower manifold pressure and thus supplying less fuel pressure. The map sensor must have been going crazy based upon what my boost gauge was showing. Anyways, I rerouted the vacuum lines. The FPR, manifold solenoid, and boost gauge all share one source. The wastegate solenoid now sees WOT manifold reference pressure at the throttle body small nipple. The boost gauge is now steady as it climbs to 14 psi. The A/F gauge reads a beautiful shade of blue (.9 volts) and EGT maxed at 1550F on a sustained 4 gear pull at max boost. Please support our vendors, especially Paul and Chris at TurbosUnleashed.com. They work tremendously hard and provide us with invaluable information. -----------------------REMOVE-FOOTER-WHEN-REPLYING---------------------------- Questions? Visit http://www.sdml.org/ To be removed, visit http://www.sdml.org/pages/leave.html
