-----Original Message-----
From: John Korsak [mailto:jkorsak@heath-bloxom.com]
Sent: Thursday, October 25, 2001 3:51 PM
To: Sally or Dick Taylor
Subject: RE: Stumble, miss & hesitate
Dick,Jim and Jay
Thanks for your replys. The car idles great at either 12 or 32 deg (albeit
usually idles @ 1000 RPM not 850). The miss occurs between 1500 and 3000
RPM under load.
I purchased the car this past June. PO hadn't done much to the car for some
time. I changed all the hoses, fluids, brake lines, etc. I installed
Pertronix soon after the car started missing. I put points back in, but it
made no difference. As a result of a List search on the problem, I ordered
new distributor springs and installed them. No difference in performance.
Should I put old springs back in?
Miss (range of RPM) seems to be altered as I advance timing (it moves up the
scale). For example, @12 deg miss occurs between 1000 and 2500 RPM when
under load. @18 deg miis occurs 1500 to 3000 RPM under load. @32 deg miss
occurs on occasionally.
I,m not sure about your "on the rocks" statement. What does "on the rocks"
mean?
I will try to remove ERG valve tonight and let everyone know of my results.
John
-----Original Message-----
From: owner-6pack@autox.team.net [mailto:owner-6pack@autox.team.net]On
Behalf Of Sally or Dick Taylor
Sent: Thursday, October 25, 2001 1:27 PM
To: John Korsak
Cc: 6Pack@autox.team.net
Subject: Re: Stumble, miss & hesitate
John---You gave a lot of good information regarding your symptoms. The
one about getting better mileage when the timing is set at 12 BTDC, but
idles better when set at 32 BTDC and returns poorer mileage is
troublesome. Do Frank's suggestion on checking the EGR valve, as it can
certainly affect idle if stuck in the open position, but a real pain to
block this off.
You didn't state when this started, and it would be helpful to know when
this all came about. Did you replace the points with Pertronix when
'normal' points replacement didn't solve the idle/stumble? How about the
advance control springs? Either of these two can cause a low rpm
problem.
What I am going to suggest for your mechanic to check could only
happen during a rebuild, not during the course of normal wear. See if #6
valves are "on the rock" (an English expression that took me years to
figure out) when the timing pulley pointer is exactly on "0" with #1
firing.
We all like feedback on juicy topics such as yours!
Dick T.
|