by Ragtop George » Tue Sep 24, 2002 4:12 pm
Well, then, something has changed for 02. I was very careful hooking up the EBC, and since it was cutting boost during the shift, and at high RPM, I know it was working. So either the automatic has been beefed and the ECU signals are different, or the EBC has been changed. It would be interesting (at least for me) if someone with the lack of boost actually hooked a test light to the red/yellow wire (the one that controls the VSV) and watched to see what the EBC was doing as a function of what gear you are in.
I double checked the scanned EBC installation instructions from Jason Gibson's web site, they are the same as mine. In testing, it specifically says that the bypass actuator is activated for 0.6 seconds during the 1-2 shift. If there was no boost in first, this would not make any sense.
There are two ways that boost is controlled, one is from the EBC via the VSV which gets its vacuum from the vacuum resevoir, and the other from the other side of the VSV which is just normal intake vacuum, derived from between the throttle body and the blower inlet. The normal vacuum side bypasses the blower during light throttle so that fuel economy is not affected. If for some reason the normal vacuum was not dropping off during first gear, that could be the problem. That is where the test light on the EBC control wire would tell you.
Did anyone ever talk to somebody at TRD to confirm the first gear boost issue?
George