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Engine stalls at a stop light?

Tiny
SNOOKSLAYER06
  • MEMBER
  • 1 POST
  • 1998 FORD EXPLORER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 155,000 MILES
My 1998 Explorer with 155000 miles Stalls when coming to a stop light or stop sign. When the mechanic checked my car the diagnostics gave no codes. Ive had several mechanics look at it and no one can find the problem
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Friday, October 9th, 2020 AT 12:56 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Without codes, it's harder to identify. Make sure there are no vacuum leaks and you may want to check fuel pump pressure.

Let me know what you find.
Joe
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Friday, October 9th, 2020 AT 12:56 PM (Merged)
Tiny
DIANE1279
  • MEMBER
  • 2 POSTS
  • 1998 FORD EXPLORER
  • V8
  • AWD
  • AUTOMATIC
  • 160,000 MILES
The brake light is illuminated on the dash. The brake light above the rear window flashes when the truck is off. This morning after I got off the highway the engine stalled when I came to a stop. She started right back up. When I stopped at the next light the rpm's fell & she stalled again. Started right back up & stalled when I stopped in a parking spot. Any suggestions as to what to look for would be greatly appreciated!
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Friday, October 9th, 2020 AT 12:56 PM (Merged)
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Look on the brake booster for the vacuum hose, where it plugs into the booster is the check valve, remove it, and try sucking thru both ends, air should pass in only one direction, replace the valve if it fails, let me know what you find.
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Friday, October 9th, 2020 AT 12:56 PM (Merged)
Tiny
DIANE1279
  • MEMBER
  • 2 POSTS
The check valve is fine. Air only passes through in one direction.
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Friday, October 9th, 2020 AT 12:56 PM (Merged)
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Then the booster itself my have a bad diaphram, shut the truck off, pump the brakes untill all air is out (hard pedal) then while you hold the pedal down, start the truck, does the pedal sink a bit? If yes, the booster is ok, if no we have a booster problem. If you can gat a vacuum pump hook it up to the booster and pump it until you have 18 hg of vac, then wait, a minute, if the gauge holds, booster is good, if it drops, or no vacuum builds, replace the booster.
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Friday, October 9th, 2020 AT 12:56 PM (Merged)

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