Having problems with your 1994 Mercury Grand Marquis ?

94 grand marquis driving at highway speed or up incline engine has intermittent power loss til i pull over then it runs fine. changed fuel filter and gas cap. engine codes are 172 and 176

Posted / edited by AnonymousUser on : 18-03-2019

Answers :

Your codes indicate both sides of your engine are running lean. You may have success with a throttle position sensor. The TPS tells the engine how much fuel is wanted and to advance spark. It is behind the plastic ductwork, on the metal body called an airhorn. Usually on the drivers side. It has 2 screws and 1 electric plug and rides the butterfly flap outside the airhorn. Used to be $25.
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\015\012I see you have codes and I can not tell you why it did not pull up the TPS. The alternative is to have someone check your fuel pump pressure.
Repair Help & Product Troubleshooting for 1994 Mercury Grand Marquis

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