Posts Tagged ‘Ford Crown Victoria | Mercury Marauder | Grand Marquis’
When it was on the car engine light came on for a split second while I was racing the engine to see if that would get it to turn off. It was idling strangely too but after I shut the car off and back on everything was fine.
Will it come back?
I read it could be Throttle Position Sensor going bad..
The problem is sporadic, sometimes going a couple of weeks in between episodes, but somewhere at the 40-50mph speed, between 3rd gear and overdrive, and usually on a slight upgrade, the car jumps as it decides whether or not to stay in 3rd or shift for more power. The jerking effect can be so severe that it stalls the car. I’ve taken it for a diagnosis test at a transmission place but I can’t duplicate the problem for them. There are no codes showing, and the transmission fluid was changed last year, with a friction modifier additive. Best guesses have been torque convertor and/or solenoid, fuel pump (that tests fine), throttle position sensor (again, no codes), egr system (all replaced and throttle body cleaned) and overall tune-up, which has also been done. I really don’t mind having to spend the money on the transmission work but don’t want to do it if the problem lies elsewhere. Any suggestions out there what my next step should be? I need to rely on the car for long trips and right now I don’t have the confidence.
Thanks.