Question about 1994 Ford Aerostar Extended
When you press on the gas, several things should happen all at the same time. -
More air should be admitted - by means of a butterfly valve or similar in the carb (if petrol).
Firing of the fuel should advance in line with the piston position being just before TDC.
More fuel obviously.
So, the question remains - which is it?
Check air feeds (fit clean new air filter), visually check operation of throttle controls and links. Check there isn't a vacuum line fault. This is most likely the cause, as it is the main method to control timing and air advance systems.
Check fuel delivery is not overfueling after making certain it is not an air issue. This is a progressive thing, wheras the vacuum line is more sudden.
Hope this solves it for you.
Posted on Jul 04, 2008
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