Dave, My 11004,Jan. 82 Idles at 900, I have also noticed that even thought the books say idle can't be adjusted. In another part of the service manual it shows you how to adjust the idle. John 11004 --- In dmcnews@xxxxxxxxxxx, "Dave Swingle" <dswingle@xxxx> wrote: > Thanks. The idle RPMs (750 vs 850) were estimated based on watching > the tach thru the back window, not with any fancy test equipment. > Strange thing to us was the difference between the two cars, one > going to 1200 and one (mine) going to around 900 by flipping the > microswitch. I did notice, though that it was impossible to make my > engine run at, say, 1000 rpm with the gas pedal, it was either above > or below. > > BTW - these two cars were within about 400 VIN of each other, both > 10/81 build. > > So - I guess the other car has a 1200 rpm ECU and mine has 900. Any > idea when the spec changed? I'll bet it was 10/81 or one of these has > been changed. My car is the slightly later build date of the two. > > Thanks!! > > Dave > --- In dmcnews@xxxxxxxxxxx, "DMC Joe" <dmcjoe@xxxx> wrote: > > Dave, > > > > There are two versions of the idle speed ECU both are set for 750 > +/- 50 RPM when switched on and 900 and 1200 RPM when switched off. > Although the 1200 RPM sounds high the effect will null out as soon as > a load is placed on the engine. > > > > BTW; your idle speed should be 750 RPM not 850. > > > > > > ----- Original Message ----- > > From: Dave Swingle > > To> Subject: [DML] Idle_Off-idle problem > > > > either idle at 850 rpm (normal) or, as you tip-in the throttle, > jump > > immediately to about 1200