Slight "run on" after shutdown, Any thoughts? Options

[oakdalecurtis]

'76 California 2.0 F.I. stock, 119,000 miles, passes smog every 2 years. Using 89 octane gas and Brad Penn 20/50 oil. Engine starts and runs well, but lately the engine has been "rough running" on for one or two seconds after ignition shutdown. Any thoughts on what might be causing this and what I might do to fix it?

[Tom_T]

Also Curtis, unless you've had knocking &/or increased the compression ratio on your 76 2L, is should run fine - even better - on the basic Regular 87 for which it was designed to run, back when that was the only "Unleaded Regular" around.

There should be no reason to run 89 or higher octane gas on any stock CR 73-74 GA 2.0L nor 75-76 GC 2.0L 914.

In some states where they have 85, 89, 91 choices only - then yes, cuz you don't have the 87 option.

In today's ethanol octane boosted world, I've heard that the over-octane rating can cause carbon build-up & other issues resulting from more ethanol than needed to prevent knocking.

Octane rating only prevents knocking, & in no other way makes any car rated for a lower octane rune better .... but it does fatten the profits of the oil companies! (IMG:style_emoticons/default/dry.gif)

(IMG:style_emoticons/default/beerchug.gif) (IMG:style_emoticons/default/santa_smiley.gif)
Tom
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