1998 Mercury Mystique • 6 cylinder FWD Automatic • 40 miles

1998 Merc Mystique 40K mi, cranks, won't start. OBD codes P0171, P0174, P1131
February 26, 2011.

You have a lean fuel condition with those codes

Lean fuel condition could be caused by one of the following below: 1. Vacuum leaks
2. EGR and PCV valve.
3. Low fuel pressure.
4. Dirty fuel injectors.
5. Mass Air Flow Sensor.
6. Oxygen Sensor.

Cranks over and w/n start-Also do below

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine at least 3/16 away from ground -have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, Do you hear the fuel pump come On when you turn key on? If not check fuel pump fuse and fuel pump relay if so, check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs, coil's resistances, distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it

Feb 26, 2011.
You could squirt some gas in the intake and see if it starts. That would narrow it down to fuel issue.

Feb 26, 2011.
There should be a reset button on the inside drivers door. Atleast there is on a 96, push that button and it should start if not check the manual.

Jul 7, 2011.