99 F150 stalling issue
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99 F150 stalling issue
My truck has developed a stalling issue that is getting worse. It first did it in November while I was getting to my hunting spot. I pulled up to where I park, and when I shifted from drive to reverse, it quit. Started right back up and never had a problem again that day. A couple days later, I was sitting at a red light, and when it turned green I let off the brake and as soon as I touched the throttle, it quit. It is to the point now that it does it almost every time I try to take off from a stop. It seems to be only when it is hot, because if I let it idle in the driveway up to operating temp, as soon as shift into drive or reverse, it quits. I don't have a fuel pressure tester at home, and it's like 3 outside right now. The thing doesn't quite fit in the garage. My scan tool doesn't show any codes, but mode 6 data shows misfires in cylinders 7 and 8, but not enough to turn on CEL. Oh yeah, it's a 5.4. All the temp sensors appear to working properly looking at live data, as does MAF and IAC. The baro reading seems a little low, but nothing drastic. Has anyone run into this before?
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It had one blow out a few years back, when my Dad owned it. As far as I know the plugs have been done, but the other 7 coils are motorcraft.
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