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Old 01-20-2011, 03:09 PM   #2 (permalink)
EcoModding Apprentice
Join Date: Aug 2008
Location: Kc KS
Posts: 148

Dart Lite - '76 Dodge Dart Dart Lite
90 day: 18.34 mpg (US)

Beater..with a Heater - '94 Isuzu Rodeo LS
90 day: 16.19 mpg (US)
Thanks: 4
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You might consider a sea foam treatment, to help clean valves and combustion chambers of carbon buildup. Carbon can cause pre igntion, so a sea foam treatment, letting it sit overnight, might clean things back up enough to allow you to advance the timing back to stock. I would also hit the carb with some carb cleaner, and check PCV valve. PCV is a mixed blessing as it catches the blow by, but reintroduces the oily blowby into the intake manifold. I good carb spray down should help remove some of the blow by gunk.
Current MPG driver:
1994 Isuzu Rodeo - Beater with a Heater...
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