Mercury Grand Marquis Questions

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How much should i pay for this service?
ECU no codes, tune up, filters,plugs. hesitates on slow acceloration. Drives great under load. pronounce shifting at 40 mph accel or decelloration. I think trans due to SCT Programming I installed 2 years ago
AUTOMATIC TRANSMISSION-THE HARDEST GEAR TO 'FIND' IS REVERSE. THE SHIFTER BEGINS IN PARK, I SHIFT INTO REVERSE-AND CAR JUST SITS THERE LIKE I NEVER SHIFTED OUT OF PARK. I HAVE TO SHIFT BACK AND FORTH BETWEEN PARK AND ...
had new air bags installed and do have a small leak but compressor will only run for about 2 - 3 seconds when turning on the ignition. I can turn the ignition on and off continuously until the air bags reach the right...
The motor was making a noise when it use to work,once it quit working then it did again, but now nothing.
The gas cap has been replaced along with some of the vacuum hose located underneath/near the gas tank. Took it an Auto Zone and got a P0442 when they checked it. What's the cost to replace a purge and/or a vent soleno...
The engine cranks fine but will not start. Could this be a fuel pump failure? The car is clean and well maintained. It has 120K miles.
originally the check engine light came on, then went out after three days. bad gas was used then car wouldn't start at all. changed plugs and wires. No change. It tries to start but not hitting on all cylinders.
Is there a delay switch or fuse that causes this?
I was told to change to Fuel Pump control module. Would this help solve the vibration problem..!!
i just put in a 04 crownvic transmission I change the speed sensor
MY engine light came on right after an oil change. I took my car back and they told me and showed me 4 "spark plug" like things under my car and told me I had 4 oxygen sensors that were not functional on the diagnosti...