Slight miss in my 69 Z28

Home: Goto Homepage.
Subscribed: See all threads you’ve posted in or started.
Today's Posts: Posts made today. Bold = unread.
New Posts: Shows all unread posts since last visit.
New Thread: Newest threads by creation time.

**PxTx** · #1 04-16-2016, 10:48 PM

Can you verify what your initial timing, total timing @ 3000 is? How much vacuum advance?

Any chance you could get it on an O-scope and examine the ignition system. You could also use a wide band O2 probe in the tailpipe and dial in the carb too.

The cylinder pressure at low speed is greater than in the upper R's and increased cylinder pressure = increased resistance in the ignition system. Would seem like it ignition related.

**ssl78** · #2 04-16-2016, 10:51 PM

If you hold your hand over the top of the carb and restrict air flow does it die out or does the idle pick up? If the idle raises you could have a vacumn leak.

Thread Tools
Show Printable Version Email this Page
Display Modes
Switch to Linear Mode Hybrid Mode Switch to Threaded Mode

Dedicated to the Promotion and Preservation of American Muscle Cars, Dealer built Supercars and COPO cars.