Incorrect control pressure can can cause a rich condition, but my CPR is brand-new, and I've checked the power supply for the heater element. You have to have high enough Main Line Pressure to overcome the spring-loaded valve in the injectors. 5.0 bars or so. If the injectors aren't open, then what the plunger does, and the control pressure on it is irrelevent. This should occur immediately upon cranking when the fuel pump energizes. You're already partway there because the accumulator maintains a rest pressure to prevent vapor lock. My Primary Pressure Regulator (PPR) originally was rusted shut. The injectors REALLY chattered then because there was an overpressure condition. No fuel could circulate back to the tank. A lot of fuel ended up in the oil pan. I'm using a Hayne's fuel injection manual that deals specifically with the K-jetronic and Cohee's Volvo manual and they both support this. I've found a pressure gauge but I can't find the 3-way tee and fittings of the proper size. As far as injector cleaning, some shops have the equipment to hold open the injector valve while backflushing a cleaner through it to clear out the little screen inside. Some use an ultra-sonic sink. We had these on the submarines I rode. Very cool. --- In DMCForum@xxxxxxxxxxxxxxx, Jim Strickland <ihaveanaccount@xxxx> wrote: > "primary pressure regulator opens too soon preventing pressure from > building?" what does that mean? Since the Injection system is > continuous (eg, CIS), then the injectors do not "wait" for anything to > happen, so injector timing is irrelavent. The only thing that controls > how much gas gets into the engine (under normal running circumstances) is > the fuel pressure and the plunger position. If you think your pressure > is too low, you should check the control pressure regulator as it > "counteracts" the primary pressure. You might also have a fuel pump > issue, but this is less likely. You can get a fuel pressure guage and > all the plumbing to test the primary and control pressure for $50- $70. > > Streaming is usually the sign of a dirty injector. I don't know how > you'd clean one though..? I just bought a new set when the car was > running like S. > > Jim > > > > On Thu, 17 Jul 2003 01:44:55 -0000 "cruznmd" <racuti1@xxxx> > writes: > > New starter showed up today. > > > > Fast as fast can be, you'll never catch me! What a difference. With > > some actual speed, it was able to circulate the little bit of oil I > > put in the cylinders to pre-lube them and that squeal I had shut > > right up on the 2nd revolution. > > > > I have decided I can't screw up my fuel distributor any worse so I > > cleaned it up w/acetone & put the mix control unit back together. > > The > > airflow sensor doesn't bind anymore, and the metering plunger moves > > much more freely, but I still don't think it's quite right. Some > > more > > reading also leads me to believe that the primary pressure regulator > > > > opens too soon, preventing enough pressure from building to fully > > open the injectors. Combined with a sticking plunger, they just > > drizzled, and never shut off until the pressure bled off. > > > ________________________________________________________________ > The best thing to hit the internet in years - Juno SpeedBand! > Surf the web up to FIVE TIMES FASTER! > Only $14.95/ month - visit www.juno.com to sign up today! Yahoo! Groups Sponsor ADVERTISEMENT <http://rd.yahoo.com/M=194081.3551198.4824677.1261774/D=egroupweb/S=170512 6215:HM/A=1663535/R=0/SIG=11ps6rfef/*http://www.ediets.com/start.cfm?code= 30504&media=atkins> click here <http://us.adserver.yahoo.com/l?M=194081.3551198.4824677.1261774/D=egroupm ail/S=:HM/A=1663535/rand=612601816> To unsubscribe from this group, send an email to: DMCForum-unsubscribe@xxxxxxxxxxxxxxx Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service <http://docs.yahoo.com/info/terms/> .
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