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1986 Mercury Grand Marquis Sedan Base

1986 Mercury Grand Marquis Sedan
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January 23, 2011, 2:19 pm

Eugene T
 

Question: what is symtoms of faulty map sensor?

Feels Like>> Vehicle is sluggish>> When I need passing power and press the accelerator to the floor>> Yes>> gas milage in half, slow to take off.hit a hill no power. replaced cats.ecm,coil,wires,ign module. hard to start also


January 25, 2011, 4:48 pm

Elizabeth K
Expert Mechanic

The MAP sensor will not cause a hard starting problem, so fix that first. You could easily be having a fuel or air delivery problem. If you haven't had a thorough tune-up done in the past year, start there (air filter, fuel filter, clean the throttle body...). That will cover most of the troubleshooting that a problem like this will require, and you need one anyway. Reply back with what you find.


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