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I HAD THE same problem.... 87,000 2000 grand Cherokee 4.7l

when i let off the gas it might stall. happens 1 to 4 times a day.

so far i have

replaced the crank shaft sensor - it stopped stalling for 3 days $130

cleaned the throttle boddy free

replaced the throttle position sensor $72

replaced the idle air control sensor $132

replaced the map manafold airflow sensor $125

no luck it is still stalling. by the way i have done all the work myself. it was about 30 minutes for most parts

i just ordered a rebuilt ecu or pcu engine control unit. they program in the vin, mileage and part nbr so you gc will recognize it. $185

installed ECU 2 days ago...... so far so good.

good luck

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12y ago
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14y ago

This is probably fuel related but it could also be a vacuum problem or even electrical. I suggest you take it to a large parts store and have them read the computer for an error output which will help to narrow the problem down some. This should be done by them for free since they want to sell you the part that fixes the problem.

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13y ago

it could be the crankshaft position sensor, it may be loose and not lined up to send signal,or it may be bad.

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Q: What makes your Jeep Grand Cherokee run great for a while then die?
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