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I have 249000 miles on this armada . It tow’s small trailers fine but when I tow a boat - after 18 miles engine stalls when I slow down or rpm is below 1000 while moving . I have to restart the engine and it almost feels it lost all gas and not getting compression . Once it starts with difficulty it will do the same . Also I cannot go over 3000 rpm when this happens. If I put it in neutral and keep rpm around 2k it does not stall on light but very pain to start once it stalls ; once the engine cools for few hours it runs fine with no towing load .

changed fuel pump bu it is something else ; any suggestions
 

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hello congrats on the mileage! shows the car can be reliable but from time to time maintenance will need to be performed.

Your issues are common and worth your time to search this sub forum. there are some common things that could be afoot.

1. check compression
2. coil packs/plugs
3. faulty petrol pump
4. dirty MAF
5. damaged cats/o2 sensors
6. ground straps/battery cables

check for any codes at the obd port
 
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