Where is the MAP sensor on 99 jeep grandcherokee 4.7 L 8 cylinder

why not post symptoms first so we can be on same page .
this is easy. super easy. do you know how to back probe connectors yet, if not learn the first (ask)
got a voltmeter???????
check it at key on, idle (does engine run?) and racing throttle fast.
get the 3 voltages.
here is the curve.
off my jeep
http://www.fixkick.com/sensors/tests/MAP-sensor-output-real.jpg

this data is weak on jeeps, not sure why, my guess is graphs scare folks, but is simple, jr.high 9th math.?
so keyon about 4v ?
idle is 20 inches HG, so 1volt? see that below
and then gun the throttle you can hit maybe 3v?
if yes, its good.
there are 3 pins, 5v power, ground and output the below is OUTPUT to ECU.
99% off all MAP replaced are good, due to not having this curve.

Check fuel pressure regulator for a rupture by pulling off the vacuum line and see if it is full of fuel.

Check this Jeep information about your engines...
3.7L -The Manifold Absolute Pressure (MAP) sensor is mounted into the front of the intake manifold with 2 screws.
4.0L - On the 4.0L six-cylinder engine the MAP sensor is mounted to the engine throttle body. On the 4.7L V-8 engine the MAP sensor is mounted to front of the intake manifold.
4.7L - The MAP sensor is located on the front of the intake manifold. An O-ring seals the sensor to the intake manifold.

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code 15 means ... no vehicle speed sensor signal
code 33 means... a/c clutch relay circuit
hope this helps..

map sensor would be a likely cause. check all service items first(air filter, fuel filter, etc.).

Go half way between the air cleaner box and the "carburetor". Up the 4" black air pipe, a wire harness plug plugs into the MAP sensor there. Also called MAS air flow sensor.

Hello osmanmackoy; My name is Roger and I will help you. First have you done a compression test? If so the compression must be over 100 psi. in order for the cylinder to fire. This would be a bare minimum. I would also look at the oil pump drive unit. This would be located where the distributor would have been on the older engines. There is a sensor mounted on the top of the drive. Remove the sensor and check the inner shaft. There should be no side to side play in the shaft.If the shaft moves side to side You need to replace it. This sensor is used by the computer to tell what cylinder to fire. The computer will not know which cylinder is next to fire. This will cause a no start or backfire condition.
Please rate the quality of the answer given as this way we know the answer was helpful. Should you need further help Please just ask . Thank You for using Fix Ya. Roger

check the idle speed sensor also the map sensor

well if you don't geta answer call auto zone or auto advance

get a 6 cylinder motor drop in this is best gas saver for most vehicles 4 cylinders dont have the ability to push all the weight of a vehicle but runs smoothly
6 cylinders are as i put in words are evenly balanced for everyday use and not gas guzzler either