PeachParts Mercedes-Benz Forum - View Single Post - Odd RPM behavior ... tranny? throttle linkage?

BodhiBenz1987 · #1 11-03-2005, 02:10 AM

... my 87 300D did something funky today which concerned me ... oddly enough, my Jeep did something similar a few weeks ago, and I had forgotten about it.

It was chilly this evening, but not remarkably cold. I started up the car aftet it sat for oh, 17 hours or so, and let it warm up for about five minutes. Everything normal. It was not at operating temp but I pulled out and started to pull out of my little parking lot at about 1000-1500 rpm (I try not to let it over 2000 until completely warm) ... well I got about 200 yards out to where there is a stop sign, and when I put on the brakes and came to a complete stop, rather than dropping down to 700 rpm where it idles, it stayed at 1000 and sounded a little "frantic" (does that description make sense?) for a couple of seconds. Because I was a little too far out in the intersection and someone was coming, I put it in reverse to back up and collect my thoughts, and at that point the rpms went back down. Everything went normal for the remainder of my errands. I know sometimes if the car is going at higher speeds, it takes a while for rpms to drop, but I was going at snails pace and under these circumstances, stopping usually causes it to go right to idle. Instead it definatley hung at 1000 for a moment. Any ideas why? It's possible it was a tach readout error, but I felt the engine pulling a little more than it should have. I can't really get my brain around how that might be a transmission problem that would cause that behavior ... my dad thought maybe it was a stuck throttle linkage, but it didn't exhibit that behavior again during the drive.

Any ideas? It may never happen again, but I'm going to worry about it anyway, at least for now. Heaven knows what I would do with my spare time if I didn't have this car to worry about.