So let's move on to the VRIS system.BLUMX6 said:OKAY, I CHANGED MY O2 SENSORS. THAT HELPED MILAGE ALOT BUT POWER ONLY A LITTLE(I POSTED A WHILE AGO "WEIRD POWER CURVE"). I STILL HAVE NEXT TO NO POWER BELOW 4300 RPM OR SO, THEN IT KICKS IN HARD. WHAT ELSE CAN IT BE??? PLUGS N WIRES MAYBE??? HELP PLEASE!!!
It's a good test of the vacuum motor at idle. The problem with trying to use it all the time is that at WOT, there's little vacuum in the manifold, so the motor will probably close again. That's why the VRIS system is fed from those two black vacuum chambers under the intake manifold (you can just see them peeking out from under the plenum): they store vacuum and supply the VRIS system, through a one-way check valve, when needed.BLUMX6 said:OH YEAH, I FOUND THE VAC LINE GOING TO THE CRUISE CONTROL. IF I CONNECTED THIS TO THE VAC MOTOR DIRECTLY(RESULTING IN ALWAYS OPEN) SHOULD I BE BETTER? IT'S OPEN FROM 3250-6250 ANYWAY. THATS THE REAL POWER BAND ANYWAY,RIGHT?
Just leave it for now. That "vacuum" line isn't actually a vacuum line at all. It's a fresh-air feed for the EGR solenoids. That line plugs into the airbox so it gets filtered air. If you plug it, the EGR valve won't get the correct air and you'll probably set a code 16.ALSO WHILE SNOOPING AROUND BY MY THROT BODY, I FOUND A HOMELESS VAC LINE. GOING INTO THE MANIFOLD TO THE LOWER RIGHT OF THE OPENING OF THE T/B. IF YOU'RE LOOKING STRAIGHT INTO IT. I THINK IT USED TO BE CONNECTED TO THE OEM AIRBOX, WHICH I NO LONGER HAVE. IS THIS ANY RELATION AT ALL? THE AIRBOX IS PART OF INDUCTION, AND WE ARE TALKING ABOUT variable resonance INDUCTION system. AT LEAST YOU SEE MY LOGIC, BUT IS IT RELATED? SHOULD I PLUG IT OR APPLY VAC OR APPLY BLOW? THERE'S NO SUCTION ON IT NOW.
Hmmm. The only thing that immediately comes to mind is the HVAC (heating, ventilation A/C) vacuum feed. Are your vents working & heater working properly?I ALSO FOUND ANOTHER ONE (HOMELESS) BEHIND THE VRIS SOLENOIDS BY THE FIRE WALL. JUST BELOW THE VRIS ACTUALLY. SAME QUESTIONS FOR THIS ONE TOO. EXCEPT I HAVE NO CLUE WHERE THIS ONE CAME FROM.