[Main 9000 Bulletin Board | BBFAQ | Prev by Date | Post Followup ] Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos Re: rough ridin' continued Like This Post: - Subscribe to Daily Digest for this Bulletin Board Posted by Craig [Email] (#3854) [Profile/Gallery] (more from Craig) on Sun, 10 Dec 2000 14:26:15 In Reply to: rough ridin' continued, bg, Sat, 9 Dec 2000 23:45:47 Alert me when someone posts in this thread: Members see ZERO ads on the bulletin boards and get more feature. - Help Keep This Site Online - Signup

Pull off every vacuum hose that goes to the intake manifold one at a time. Suck on each line. If you can draw air from any of them then you have a vacuum leak. I guess the exception to this is the line that runs to the valve cover as part of the PCV system. Aero Guys advice is good too, pinch hoses while its running to see what hapens. The charcoal cannister is located in the (US) passenger side fender and is connected to a fat and a skinny hose that disapear in that direction from the intake manifold. Both should hold vacuum. You can remove the passenger side turn signal to access it if a hose has popped off. Another likely culprit is the hooter valve, a small cannister connected to the air intake with a small vacuum line going to it. Again, the small line should hold vacuum.

Where is your engine idling? It should idle around 900 rpm, if it is lower than this the AIC valve could be bad (though these normally fail in the "high" position) or your base idle could be too low, both of which would cause similar symptoms. If it only does this when cold then I would suspect the AMM. If only when hot then maybe the O2 sensor. Often vacuum leaks only show up when cold too so this might point towards something in the idle system.

Good luck,

Craig

• rough ridin' continued, bg, Sat, 9 Dec 2000 23:45:47
  • Re: rough ridin' continued, Craig , Sun, 10 Dec 2000 14:26:15 <-- Viewing This Message
    • 900 idle? Problem with idle surge w/ alternator use, Bob, Mon, 11 Dec 2000 08:54:23
      • Hmmm., Craig , Mon, 11 Dec 2000 12:06:16
        • Oh, Clean the Throttle Body too (n/m), Craig , Mon, 11 Dec 2000 18:05:31
        • Should have included 1997 aero = computer controlled idle, Bob, Mon, 11 Dec 2000 15:57:57
          • Also, Bob, Mon, 11 Dec 2000 16:01:19

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