All:<p>I'm wondering if anyone else has the same experience...<br>When upshifting below 3,000 RPM, there is a noticeable<br>rise in RPM when the clutch is pushed in. At first, I thought<br>gee, this engine hangs onto the revs like the 1.8T. Then<br>I watched the Tach. Sure enough, the revs jump by about<br>100 or so RPM during shifting. It's not as noticable when<br>upshifting at higher engine speeds..<p>I have a 99 Passat, but I'm wondering if A4 owners have<br>the same experience since it's the same engine.<p>Any theories? <p>tnx, David<p>

<br>;

My '98 A4 2.8QMS does the same thing, and from what I've read on this board it's normal. I complained about it to my dealer. They agree the RPMs hang for a little bit, and their explanation was that all newer cars do this because of the tightening emissions regulations. Something about the ECU maintaining fuel delivery for a little bit to reduce the emissions between shifts. I talked to a friend who works in my dealer's parts department, and he said even the new Jettas do it. So it appears to be normal and unavoidable unless you want to reprogram your ECU (and pollute more).<p>Jim Meyer

I know of other makes that do it, too, as an emissions control function...

I have noticed this too, and is something I intend to talk to my dealer about when I bring it in for the 7500 mile service. As far as driving, I have gotten into the habit of releasing the gas slightly BEFORE disengaging the clutch- eliminates the "overspeed", but still takes an excessive time for engine to "spool down" to RPM appropriate for next higher gear. I find it most aggravating on a 1-2 shift.<p>Was just wondering; would an aftermarket chip help? This to me is only reason to go to one; I don't think they can gain noticeable add'l power on non-turbo engine.<br>

Recently added a Neuspeed chip to my 30v-fwd<br>5spd-Makes a big difference-no more lag/drop between 3500-4000rpm-much better response and noticeably faster-also have ram-air and scorpion exhaust.(It winds up fast in all gears).<br>

<br>My '99 QMS exhibits this as well. Seems like it's controlled by a vacuum operated dashpot connected to the throttle linkage. It is visible on the top rear of the engine once the plastic shroud is removed. You might try removing and plugging the vacuum line to this device if you find the "hanging rpm" to be a problem. A number of cars from the late '60s used a similar device, also in an effort to control emissions.

This Sunday AM took off the plastic plenum shroud (nice deisgn - 1/4 turn per screw and its off!) and looked at this dashpot. Assume one you meant was at driver's side rear of engine, with a vacuum hose connected at the top and a linkage rod below it disappearing down into the engine. Well, it isn't a dashpot - it's the vacuum actuator for the cruise control. Pulled the vacuum hose and capped it, then went driving. Didn't seem to make a difference in RPM 'hangup', but cruise was totally dead. <p>Any other insights? I would be interested in hearing them.<br>