Thread: This is new: stumbling/missing at idle/cruise speed
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Old 02-27-2011, 03:25 PM
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Dangerous Doug Dangerous Doug is offline
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Join Date: Apr 2004
Location: Scotts Valley, CA
Cobra Make, Engine: ERA 289 FIA #2108
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Default This is new: stumbling/missing at idle/cruise speed
This just started this afternoon. Heading down to the hardware store I noticed my engine sounded like it was missing a little while at a steady cruise---running rpm's just above idle. When I stop on it, it accelerates fine, but sounds awful at a steady cruise. Never did this before.

Checked the plugs and the cap/rotor, and spotted no issues. I haven't checked the timing yet, as I suspect the carb.

Engine is a 302, mildly pumped up with a Holley "Street Avenger" 670cfm. Checking it at home, it seems to idle okay, but if I start lightly feeding it some pedal it starts to stumble.

I did find a cracked vacumn cap, but I replaced it and there was no change.

Any suggestions?

DD
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