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94 Chev S10 Blazer 4.3 cpi has a rough idle and it surges going at a low speed Changed the plugs and the passenger side has black soot on them while the drivers side looks good Gas mileage terrible?
Wiki User
∙ 14y ago
Regulator leak can be inspected by removing valve on top of plenum and looking for fuel leak in plenum when key is cycled. When regulator leaks, the fuel drains into the passenger side of intake runner. Dry, black sooty deposits. Will cause weak spark and eventually misfire. Fault: over-rich fuel mixture. Check: carburetor mixture settings, float level and jet sizes; choke operation and cleanliness of air filter. Plugs can be re-used after cleaning. Learn to Read Your Plugs Today�s fuels vary in quality and additive treat levels. Although a certain level of detergent additive is required by law to be formulated into gasoline, cost restrictions cause refineries to use low quality additives in the lowest additive concentration (LAC), a level insufficient to prevent deposit accumulation. As a result, deposits accumulate on fuel injectors, intake valves and combustion chambers, often within just a few thousand miles, disrupting spray patterns, affecting electronic sensors and causing a multitude of problems. Your Injectors if you have them more then likely need a good cleaning, then help to keep them clean as you drive. Good Luck and Remember.
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See My Bio For Information & Contact Details.Regulator leak can be inspected by removing valve on top of plenum and looking for fuel leak in plenum when key is cycled.
Wiki User
∙ 14y ago
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