Miss under pressure....

[JTesta1966 at aol.com]

In a message dated 6/28/00 9:35:38 AM Eastern Daylight Time, 
sabatine at epix.net writes:

<< The car had a pretty severe miss at idle, seemed like a lean skip.  No
 >ign. scope available.  Replaced plugs, ohm checked wires, bench tested
 >coil, changed cap + rotor.  Replaced coil for testing.  Injector
 >balance test showed no problems, fuel pressure was at the low end of
 >specs but matched several other cars on the lot.  Richening engine
 >seemed to help, but not cure.  Problem was apparent at all temps but
 >worse with heat, maf connected or no, open or closed loop.  The miss
 >was bad enough that the ecm would sometimes increase idle speed at a
 >stoplight, making the driver work to keep the vehicle stopped.  The
 >problem went away as loads and rpm i >>

Is it possible you missed the vacuum line that goes to the cliamate control?  
Or a vacuum line that comes off ONE runner in the intake tract somwhere?

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Jim Testa                                                         TType86 on 
#BuickGN
ASE Master Technician                                     
buick.fiendish.net:6667
L1 Advanced Engine Performance                          NJ Lic MV Inspector
jtesta1966 at aol.com                                  NJ Lic Emission Repair 
Tech
http://members.aol.com/jtesta1966/buick.htm
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