Need help diagnosing lean condition, poor acceleration. Have had two shops try to fix with no luck. Did some parts shot gunning myself but still no change.
In 1986 almost all manufacturers decided to go with excessive vacuum controls on the engine. The most common cause of a lean condition is related to a vacuum leak. With this engine having so many vacuum lines I would start there first and then consider the intake gasket may also be leaking due to age. Lastly check the fuel injectors. There is a technical service bulletin out that concerns the fuel injectors becoming clogged and causing a lean condition and a lack of power.
TSB# 03-06-04-030F
