2015 Wrangler Vapor Lock?

Asked by Jul 04, 2017 at 09:36 AM about the 2015 Jeep Wrangler

Question type: Maintenance & Repair

I have a used 2015 (purchased in April 2017)....it has been in service 4 times
with an intermittent starting issue. NO ONE has been able to figure it out.  It
runs fine, but short bursts of starting and stopping is when it has a problem.  
It cranks but doesn't turn over.  If it has time to cool, then it will start fine.  
Under MFG warranty b/c it is under 36,000 miles.  finally have it somewhere
that diagnoised Vapor Lock?  Does that sound right?  From what I am
reading, that happens on older cars.   It has been in service longer than I
have been driving it!  Help!

1 Answer

75,585

What you need to determine is what's missing, fuel or spark, when it refuses to start. Then go from there. Vapor lock is virtually unheard of today. I doubt it's that. My first guess would be an ignition (no spark) problem. Try spraying some starting fluid down the throttle body when it refuses to start. It should run a few seconds on the starting fluid. If so you have spark so it's a fuel problem. Such as a dying fuel pump or fuel injectors not spraying. If it won't run on the starting fluid it's an ignition system (no spark) problem. HTH. -Jim

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