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99 ford e150 4.2 v6 auto with od 163,000 miles was running perfect shifting fine it had 1/4 tank of gas i drove around most the day no promblems then i stopped and filled gas tank up 30 some gallons and added some stp cleaner its the stuff in a bottle like sea foam added a little to the oil and the rest in gas tank went home about an hour later i went for a drive i got around 3 miles and engine started losing power and hesitating then transmission didnt want to shift this happened at around 40-45mph so i manually down shifted and it regain power and i took off then i shut overdrive off with button and no shifting promblems finished my 7 mile trip to other property tranny fluid showed on cold when i checked it so it was low but then it cooled down took it 2miles down the road and ran perfect passing gear kicked in ran like new on the way back it lost power and van shut off battery light and oil light came on wouldnt start got it started and made the 1/4mile back to property just bought the van i noticed when i filled gas tank it had a key lock gas cap said click 3 times it diddnt click later after battery light came on put it on the charger and it was at like 30% just letting you know these 2 details thinking it could be the fuel cap or battery causing promblems thanks john
