Jeep JK won’t start when warm, help!

M

mdearmon10

New Member
Joined
Apr 2, 2024
Messages
3
Location
Florida
2017 Wrangler Sport 2 door
125k miles

Jeep has trouble starting when the engine is warm. Have already done: new battery, new spark plugs, cleaned throttle body, replaced filters, oil change, new crank shaft position sensor, new cam shaft position sensor.

I can hear the fuel pump engage when the key is turned. Problem only occurs after driving. Does not have a problem restarting in the few minutes after driving, but if I let the Jeep sit for roughly half an hour it won’t restart. When cranked the engine sounds like it’s getting a super rough idle then normally dies. New this afternoon, the engine is giving itself one shot to fire up then it’s killing itself.
 
mdearmon10 said:
No, last CEL I got was for an O2 sensor probably 2,000 miles ago. Replaced it and haven’t gotten any codes since. That’s what’s really frustrating me, I can’t seem to diagnose this issue.
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To understand better the starter turns over but it just doesn't want to start running?
 
BLACKJKU said:
To understand better the starter turns over but it just doesn't want to start running?
Click to expand...
Yes, sometimes the engine will even “start” with a horrible idle then it will die on its own within about 3 seconds. Most of the time it’s like it just won’t fire up.
 
mdearmon10 said:
Yes, sometimes the engine will even “start” with a horrible idle then it will die on its own within about 3 seconds. Most of the time it’s like it just won’t fire up.
Click to expand...


Since it's not having a CEL it seems to me it's a fuel issue, i'm not sure if there's a way to test fuel pressure on that year of a Jeep.
 
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