I would suspect a malfunctioning or improperly connected pressure regulator and/or frequency valve. Harold McElraft - 3354 --- In dmcnews@xxxxxxxxxxxxxxx, "cruznmd" <racuti1@xxxx> wrote: > My car is experiencing a loss of power. Symptoms are: > Flat acceleration curve. With 1/3, to 1/2 pedal applied, car > accelerates smoothly but slowly, depress the pedal further and the > engine stumbles mightily and the car bucks. Swapping CPR's with a > fellow owner did not correct the problem. RPM relay was checked and > is operating correctly. All fuel components are new except for the > accumulator. (1.5 years old or less). I'm currently getting 21.45 > MPG, and the lambda system is operating correctly. > > A Bosch K-jetronic pressure test rig reads the following values: > > When the rig is installed with the T-valve towards the distributor, I > get the following pressures: > > Valve open: 0 (zero) bars/psi. > Valve shut: 4 bars. > > This didn't seem right to me, so I turned it around so that the T- > valve was towards the CPR. (John H. later confirmed this for me) With > the engine off, RPM relay jumpered I read the following values: > > T-Valve open: 3.7 bars (control pressure) > T-Valve shut: 4.5 bars (primary pressure) > > Engine running (RPM relay installed normally), the following values: > > Valve open: 3.7 bars > Valve shut: 4.6 bars > > The manual states that the nominal values are: > > Primary pressure: > Checking pressure: 4.9-5.5 bars > Setting pressure: 5.1-5.3 bars > > Control pressure: > Max: 3.5 bars (when hot) > Min: (when cold) 1.4ish bars > ------------------------------------------------------------------- > Assuming that I had the rig set up right (I'm fairly confident), my > control pressure is a tad high, and primary pressure is a tad low. > Combined with possibly dirty injectors could this account for such a > dramatic loss of power? I also discovered that my air filter is > filthy already too. (9 months old) > > To put this in perspective for my fellow Americans; > > I have as much as 3 psi too much control pressure, > and anywhere from a 7.25-14.5 psi LOSS of main line pressure. > (1 bar= apprx. 14.5 psi) (Which primary pressure value do I > use? "Checking" or "Setting"?) See the fuel section of the workshop > manual. Am I making too much of this small variation in values, or is > that enough to make a difference? Personally, I think my fuel pump is > too loud even though it's only been installed for 1.5 years. I > believe it's NOS, old style. Internal check-valve. Maybe it's dying? > > > What say you? > > Rich A. > #5335 To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/