Where is the MAP sensor located?

2000 FORD RANGER
100,000 MILES • 2.3L • 4 CYL • 2WD • AUTOMATIC
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SHIRLEY DYSON
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Changed everything we could think of. The truck sometimes cranks up and runs smoothly then after it warms up a little it starts idling rough and you can cut it off and it won't crank back. After it cools off it will crank back. My husband is a mechanic, but he has never been through this before. We talked to another mechanic, and he said the only other thing it could be is the MAP sensor, but we don't know where it is located. Can you help?
Aug 10, 2022 at 2:50 PM
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JACOBANDNICKOLAS
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Hi,

Just to confirm, this is a 2.5L, correct? The 2.3L wasn't offered in 2000.

If that is correct, the vehicle doesn't have a MAP sensor. In its place is a mass air flow sensor (MAF). Has that been replaced? Also, are there any diagnostic trouble codes?

What you described sounds like a faulty crankshaft position sensor. When they start to fail, they are affected by heat. When they cool off, they work again and the vehicle will restart until it heats up, and then the cycle continues. Do me a favor.

Take a look through this link and let me know if it seems to mirror what you experience:

https://www.2carpros.com/articles/symptoms-of-a-bad-crankshaft-sensor

The crankshaft position sensor is located behind the water pump inlet tube.

Here is what I suggest. If you have a live data scan tool, when the engine won't start, check for an RPM signal while cranking. Or see if there is spark to the plugs when it won't start.

Here is a link showing how that is done:

https://www.2carpros.com/articles/how-to-check-for-ignition-spark

If there is no spark or no RPM signal when cranking, this is my first suspect.

Let me know if this helps and what you find.

Take care,

Joe
Aug 10, 2022 at 3:28 PM