2018 6.2 Starting Issues
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Cross-Country
Joined: Aug 2019
Posts: 56
Likes: 0
2018 6.2 Starting Issues
Hi everyone,
I have a 2018 XL 4x4 short bed crew cab with the 6.2 engine; 20K miles on it and I've owned it since new, it's had a pretty easy life so far. I've noticed an issue that seems to be appearing with greater frequency as time goes on. I'll drive the truck for an hour or so on the highway, stop, then get back in it after a few hours and it hesitates to start. To clarify, it cranks just fine, but it acts like it's misfiring and has trouble actually starting. I recently hauled a trailer with a total weight of about 4500lbs. After stopping, the hesitation issue happened and it was the worst it's ever been. The engine struggled to start so badly that the starter engaged and disengaged several times.
I've been looking around and it sounds like maybe it's the fuel pump? Is there a way to override the auto-start feature (keyed, not push-button)? I don't want to put undue stress on the starter.
I have a 2018 XL 4x4 short bed crew cab with the 6.2 engine; 20K miles on it and I've owned it since new, it's had a pretty easy life so far. I've noticed an issue that seems to be appearing with greater frequency as time goes on. I'll drive the truck for an hour or so on the highway, stop, then get back in it after a few hours and it hesitates to start. To clarify, it cranks just fine, but it acts like it's misfiring and has trouble actually starting. I recently hauled a trailer with a total weight of about 4500lbs. After stopping, the hesitation issue happened and it was the worst it's ever been. The engine struggled to start so badly that the starter engaged and disengaged several times.
I've been looking around and it sounds like maybe it's the fuel pump? Is there a way to override the auto-start feature (keyed, not push-button)? I don't want to put undue stress on the starter.
Cargo Master
Joined: Jul 2017
Posts: 2,297
Likes: 553
Hi everyone,
I have a 2018 XL 4x4 short bed crew cab with the 6.2 engine; 20K miles on it and I've owned it since new, it's had a pretty easy life so far. I've noticed an issue that seems to be appearing with greater frequency as time goes on. I'll drive the truck for an hour or so on the highway, stop, then get back in it after a few hours and it hesitates to start. To clarify, it cranks just fine, but it acts like it's misfiring and has trouble actually starting. I recently hauled a trailer with a total weight of about 4500lbs. After stopping, the hesitation issue happened and it was the worst it's ever been. The engine struggled to start so badly that the starter engaged and disengaged several times.
I've been looking around and it sounds like maybe it's the fuel pump? Is there a way to override the auto-start feature (keyed, not push-button)? I don't want to put undue stress on the starter.
I have a 2018 XL 4x4 short bed crew cab with the 6.2 engine; 20K miles on it and I've owned it since new, it's had a pretty easy life so far. I've noticed an issue that seems to be appearing with greater frequency as time goes on. I'll drive the truck for an hour or so on the highway, stop, then get back in it after a few hours and it hesitates to start. To clarify, it cranks just fine, but it acts like it's misfiring and has trouble actually starting. I recently hauled a trailer with a total weight of about 4500lbs. After stopping, the hesitation issue happened and it was the worst it's ever been. The engine struggled to start so badly that the starter engaged and disengaged several times.
I've been looking around and it sounds like maybe it's the fuel pump? Is there a way to override the auto-start feature (keyed, not push-button)? I don't want to put undue stress on the starter.
4wd Low
Joined: Jun 2005
Posts: 12
Likes: 4
The fuel pump assembly typically has a pressure check valve.
Turn the key to Run, but do not crank the starter, wait about 5 seconds while the fuel pump "primes".
Turn the key to Off, repeat @ Run for 5 seconds then Off. Repeat, THEN crank the starter.
If it reliably starts when you prime it 2 or 3X, expect/plan to replace the fuel pump or get used to doing that prime key dance.
Turn the key to Run, but do not crank the starter, wait about 5 seconds while the fuel pump "primes".
Turn the key to Off, repeat @ Run for 5 seconds then Off. Repeat, THEN crank the starter.
If it reliably starts when you prime it 2 or 3X, expect/plan to replace the fuel pump or get used to doing that prime key dance.
Laughing Gas
Joined: Jul 2012
Posts: 1,210
Likes: 20
From: prince george, bc canada
As said its the fuel pump. It was a flaw in the pump. My 2017 did this intermittently new and has been doing it while warm steadily for about 3 years now! Makes me pucker but it starts every time!
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