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Old 07-08-2015, 06:24 PM
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Join Date: Jul 2011
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JK Delayed Start

I have an 2011 JK Sport that has shown a delayed start over the past year. I started digging into it by adding another ground from the battery to the alternator bolt. I didn't notice much difference.

I replaced the original battery last night, and for some reason when I start cold, the delay is now longer. If I do a warm start, it fires up quick.

I checked the grounds, they look clean, unless I missed one.

I searched the forum, didn't really find any definitive answers. Any ideas? Thanks!

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Old 07-09-2015, 09:14 PM
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Bump!

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Old 07-09-2015, 09:26 PM   #3
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What does it do. Just cranks longer? And how long does it crank for?
It's fuel injected and the battery doesn't really determine how fast it starts. In a way yes, but you replaced the battery and it's still doing it. I would look towards fuel pressure next. Maybe clogged injectors? Perhaps try an injector cleaner added to the fuel. May help.
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Old 07-15-2015, 02:22 PM   #4
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If you're talking about the brief delay between when you turn the key and when the engine starts to crank, that's normal. It's not a direct connection from the switch to the starter...you're telling the computer to start the engine, then the computer does it's thing.

If it cranks forever...it's probably fuel or spark. Weak spark is my first guess. How many miles? Original plugs and wires?
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Old 08-13-2015, 02:46 PM
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The delays before starting are now increasing. How do I do a fuel pressure test? I noticed there isn't a Schrader valve.
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Old 08-13-2015, 11:56 PM   #6
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Quote:
Originally Posted by fsrtwo View Post
The delays before starting are now increasing. How do I do a fuel pressure test? I noticed there isn't a Schrader valve.
No way to give you any suggestions without more information. Read Little Greens post and describe what is going on in a way that would allow someone to help.

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