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Clean the throttle body, it is gummed up. When you changed the battery, you reset the computer and it is running with the factory default settings. Make sure to clean the front and rear sides of the throttle body thoroughly.
6 YEARS IS A LONG TIME FOR A BATTERY TO LAST. YOU ARE LUCKY. I WOULD GET A NEW INTERSTATE BATTERY & CHECK THE CHARGING SYSTEM, TO MAKE SURE IT IS OK. MOTOR RUNNING, THE VOLTAGE AT THE BATTERY SHOULD BE BETWEEN 13.90 & 14.80.
If it has a problem bad enough to stall, it should record something on the computer. Autozone or Oreillys will scan for free. You should have a circuit or sensor to speed up the idle or at least turn on a cooling fan to bring down the engine temperature.
Some of the DOHC engines use a part called a "Cam Phaser" to adjust the variable cam timing. You may want to have the Dealer run your VIN for a Recall. Ford was extending the Years and Mileage coverage and it can be a $2400 repair. If you hear a "tapping" noise that disappears after 2000RPM, thats another symptom.
if this happens while the defrost of ac is turned on, it could be a seized ac compressor which will cause the serpentine belt to squeal and drag making the engine sometimes stall. if it happens with the ac off and the selector on say the floor, or dash vents, the issue could be a bad alternator and battery. this is confirmed when the blower motor engages and the lights dim and then the truck goes dead.
try changing the air filter ,i had a problem ,at ilde in drive my trailblazer would stall, changed the air filter now it's not stalling and got my power back ,there is a secondary air pump that i have to change ,
not sure were it is ? still not running perfect but it's running better .and my service light is on too.
i got it put on scope ,it's the pump .
not sure if this helps ,but i'm start to run in to problems too,i have a 2004 trailblazer.
i like to do fix things myself ,i hope i can.it's the cost if you know what i mean.
This happened to me recently on my 2004 Grand Cherokee. It stalled out three times in a month. No one came up with any codes except that my throttle sensor needed to be replaced ($80). After it was replaced, it stalled two more times, but this time the check engine light never came back on. My local Jeep mechanic looked it over for around six hours and could not find anything. However, my amps on my battery was half of what it should be. He stated that the computer may not have enough juice to control the throttle idle that activates when the vehicle is in low idle speeds. He also stated that once you remove the old battery to touch the battery cable terminals together (you can use a wrench if terminals won't touch) for around ten seconds. This is supposed to drain any remaning juice from the jeep and is supposed to reset the idle memory and computer for the vehicle. After replacing the battery, crank the Jeep up and let it run for at least five minutes without ever touching the gas pedal. Leave it to idle and I repeat, do not touch the gas during this time. The mechanic stated that letting the vehicle run for at least five minutes without touching the gas pedal will set the computer for the Jeep to run efficiently with the new battery and will also set the idle memory for the jeep. I did so and you could actually see the RPM's going up and down until the Jeep found an efficient idle setting. Try that, I know it sounds simple, but I tried every else before this, and it has not stalled out since a couple of weeks ago. I'll write back if it does before the end of next month. Hope this helps.