RE: [DML] CPR Testing

["John Hervey" <john@xxxxxxxxxxxxxxxx>]

Dave, It's a factory adjustment unless you have the equipment.
John Hervey
www.specialtauto.com



-----Original Message-----
From: dmcnews@xxxxxxxxxxxxxxx [mailto:dmcnews@xxxxxxxxxxxxxxx]On Behalf
Of drdhdmd
Sent: Saturday, June 11, 2005 12:55 PM
To: dmcnews@xxxxxxxxxxxxxxx
Subject: [DML] CPR Testing


I am trying to test my CPR and have the CIS pressure tester.  With
the
engine off at 80 degrees F, I get a system pressure reading of 72psi
and a control pressure of only 30psi.  According to the graph in the
manual it seems like the control pressure should be between 35 and 40.

Is this adjustable? The Bosch Fuel Injection book
by Watson says it is caused by a defective CPR. Can it be fixed?

Could I be doing something wrong in my measurement technique?  It
seems
rather simple. Engine off, gauge attached,  RPM relay jumpered.
(The technical information manual says to disconnect the intake
manifold vacuum hoses but with the engine off I can't see how this
could affect it...and it does not.)

What would a low control pressure when cold cause?  Excessivel rich
mixture, correct?

Any thought and ideas are welcome.

D² & 6530
Dave Delman






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