Skip the auto shop - Our mechanics make house calls

Q: Starter

asked by on

I have a 998 mercury grand marquees and I have been having trouble start g it sometimes like like if I don't put it in drive right away it will die and some time when I turn it over it clicks I have power but it won't start to run
My car has an automatic transmission.

Hi There, It sounds like you may have two possible issues. When the car dies as you put it into gear, this suggests you have a problem with what is called a MAP sensor. The Manifold Absolute Pressure (MAP) sensor senses engine load and generates a signal that is proportional to the amount of vacuum in the intake manifold. The engine computer then uses this information to adjust ignition timing and fuel enrichment. When the engine is working hard, intake vacuum drops as the throttle opens wide. The engine takes in more air, which requires more fuel to keep the air/fuel ratio in balance. When the computer reads a heavy load signal from the [MAP sensor]((https://www.yourmechanic.com/services/manifold-absolute-pressure-sensor-map-sensor-replacement), it adjusts the fuel mixture to slightly more rich than normal so the engine can produce more power. The computer will then retard (back off) ignition timing slightly to prevent detonation that can damage the engine and decrease performance. This may also be caused by other closely related components such as a dirty or failing mass air-flow sensor, a faulty throttle position sensor or potentially a vacuum leak.

With regard to the clicking sound when turning it over, this may be related to a faulty starter solenoid. A faulty starter solenoid will generally produce a clicking sound when turning the key. The starter solenoid is located on the starter and has internal electrical contacts that transmit electricity to the starter. As electricity is supplied to the starter a small gear comes out and engages the flywheel to spin the engine over as you turn the key. When this fails, it may cause a clicking sound and will not allow the starter to engage the flywheel when you turn the key. I would recommend having a professional from YourMechanic come to your location to diagnose and inspect your vehicle.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Can't shift bugger into neutral after a battery drain

Try putting in the key and only turning it to the first position before the key turns on and try to shift the shifter to neutral. If this does not work then you can open the hood and use a...

Q: Where are the pivot nuts on my wiper arm for a 1998 chevy lumina car

Hey there, thanks for writing in. These should be located right at the base of the wiper blade arm where they connect to the spline gear. If you need help with wiper arm(s) replacements, a certified technician from YourMechanic can...

Q: Tire has slow leak

Hello. If your tire has a slow leak, this is likely due to a small hole being in it. It is very common for people to drive over a nail, screw, or road debris. When the object is stuck in...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.