Stalls when accelerating

220,000 MILES • 4.7L • V8 • 2WD • AUTOMATIC
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CHRISTOPHER DANET
  • MEMBER
  • 1 POST
2 days ago was sitting with engine idling and it started to look to shut off. I changed MAF but now I go down highway and when I mash gas it looks to stall.
Feb 28, 2020 at 6:32 AM
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KASEKENNY
  • ✓Experienced Mechanic
  • 18,907 POSTS
When you say it "looks" to stall, does it actually stall or just stumble?

If it is doing this at idle and wide open throttle, that sounds like fuel issues. I would suggest starting with getting fuel pressure to start.

I attached the range to of the fuel pressure spec. I would suggest testing this at key on engine off, idle, and then wide open throttle.
Feb 28, 2020 at 6:44 AM
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