Thread: Odd running/ stalling issue.

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One of my daily drivers is an 84 Crown Vic Ford with 302/ CFI engine. Only has about 77,000 miles on it and generally runs strong and well. But over the last few months it has started developing a running problem. It happens most when I am slowing down for a redlight or going slow over speed bumps. If the road has a washboard surface the engine bucks just as if you were rapidly turning the key on and off.............kind of like if you had a stick shift car can forgot to shift down, how the motor would buck.

If I go over a speed bump it will even stall sometimes, but most times it just stumbles a few times then smooths out. If I am going through a construction zone where the pavement is very rough it will do it too. The guy at the auto parts store mentioned the MAP sensor, but I don't want to just start throwing parts at it. Oh, it stalls the most when I am making a sharp turn like parking in a shopping center or exiting a street, probably because of the load of the power steering pump?

When it comes to trouble shooting one of the newer cars (not that 84 is newer, but my expertise ends at about 1970 ) I am lost with all the sensors , computers, and fuel injection. Any suggestions you guys who know this stuff have will be appreciated.

Don