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Engine won't restart after long periods of driving
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historia
New User
Jul 12, 2023, 5:46 AM
Post #1 of 6
(767 views)
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Engine won't restart after long periods of driving
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Vehicle is a 2019 Ford Explorer XLT with 47,000 miles. Battery is new, oil changed about 1600 miles ago.
Problem: After driving continuously for at least a few hours or so at highway speeds (60 to 80 MPH) and then stopping at a rest area, turning the vehicle off, it will not immediately restart until it sits for a half hour or so. It only does this after relatively long periods of driving. No indications at all of a problem on the dash board, no warning lights of any kind. Otherwise it runs great, always runs smooth with no hesitation.
I called a Ford dealer and they are basically as clueless as I am as to why this problem occurs. I read/researched about the evap solenoid or related vapor lock issues but the dealer said he doesn't think that's the problem.
Any ideas?
(This post was edited by historia on Jul 12, 2023, 12:15 PM)
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Hammer Time
Ultimate Carjunky
/ Moderator
Jul 12, 2023, 6:03 AM
Post #2 of 6
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Re: Engine won't restart after long periods of driving
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There is no such thing as a vapor lock on a fuel injected engine.
Please be more specific on your problem.
Is the engine cranking but won't start or is it just not cranking?
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Hammer Time
Ultimate Carjunky
/ Moderator
Jul 12, 2023, 12:24 PM
Post #4 of 6
(730 views)
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Re: Engine won't restart after long periods of driving
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No, you are wrong.
I'm going to give you the reason once
The fuel supply for nearly all fuel injected cars is a circulating system and 90% of the pumped fuel is returned to the fuel tank and fresh fuel is pumped.
You are arguing with professional techs so don't come here asking for advice and then tell us we are wrong. I don't care what Dr. Google told you.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jul 12, 2023, 1:25 PM
Post #6 of 6
(713 views)
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Re: Engine won't restart after long periods of driving
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? OK, lived it for a while, Denver and drives lots higher altitude going on interstate up to and thru Eisenhower Tunnel about as high as you can drive at speed that long if you come back. No issues even with carbs, just serious loss of power to keep up speed over 10,000 ft.
Plain water boils a lot lower temp than 212F so fuel could too.
This fuel is under pressure (injection) would defeat that like also using a pressure cooker to not boil so low to speed up that.
IF that's how and where you use this isn't the fuel sold all full of additives to match that AND can use lower octane rating or not on how aspirated. Vapor lock was fuel bowls in carbs ambient pressure did boil out had long cranking times to fill back up. Still worked you got used to that.
IF somehow route of fuel line is catching engine heat under such loads it's designed wrong we'd hear about it all the time and don't.
How hot is was the weather sun is lots stronger heats road surfaces fast. OK some 1 time issues for super extremes but still would start.
There really isn't any place to drive fast higher than that.
If that's it not all the time probably an additive out there or one used expires? Ask a local tech if that's the case it's under what to do.
That's it TMK for higher speed driving at altitude IDK of another.
No vapor lock now - something is wrong if really boiling fuel still it wouldn't last that long before starting up again.
Dump the Vapor Lock ideas those issues solved mega decades ago.
Dealer wasn't useless he/she you spoke with like us never heard of this so there's some reason if you are sure it's lack of fuel test fuel pressure anytime it wouldn't like being hot as Hammer said it's recirculating fuel I plain don't know if you were way too low on fuel or a bad habit running it way too low, nothing likes that pressure could be intermittent is going to fail and end the search for what's wrong has to be wrong when it happens would be a trick to do,
Tom
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