In a message dated 1/24/99 5:40:19 PM Mountain Standard Time,
snyler@ix.netcom.com writes:
<< My 70 1600 is tuned and carbs balanced, but it ain't perfect. On a
trip out to the grocery store (7 mi) the car runs beautifully,but on the
trip back I notice some pinging on hills. Idle speed also changes from
just under 1k rpm when cool to about 1500 when well warmed up. Is this a
vacuum thing? do I have a crack opening up (or closing) as the engine
reaches operating temperature?
I retareded the timing a bit more and with octane boost the ping is
gone, but the idle change still happens.
Still, it's running well enough to meet up with folks interested in
a Hill Country run :)
Marc Tyler
1970 1600
Boerne TX (Actually Sisterdale TX)
>>
Marc,
I can't think of anything else that would affect the idle other than a vac
leak. A good way to check is to take a can of Berryman's Carb cleaner with a
plastic tube on it and spray it at suspected areas and see if the idle speed
changes. Be careful not to get it on the exhaust and keep a fire extinguisher
handy.
Joseph Berkenbile
70 1600
Albuquerque
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