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Old 21-01-2019
Bill S's Avatar
Bill S  Bill S is offline
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Default JK CRD hard to start when hot

Hi all
Have a 2009 CRD JK Unlimited
It starts fine when cold
Runs absolutely fine after it starts
Cranks no problem
In a Nutshell it's only misbehaving when you try and start it when it's been running and hot - apart from that totally normal

The fuel filter has been replaced
The crank position sensor has been replaced
All of the leads has been loosed and re-tightened
Checked all of the relays and fuses

Any ideas guys?


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Old 21-01-2019
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Check and clean the the battery cables at both ends, the starter contact area and the terminals on the battery. After that, I'd be thinking you have a tired solenoid on the starter thats getting heat soaked.
Also check the condition of the battery cables.....look for corrosion in the cable ends near the connections.
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Old 23-01-2019
MidnightMods  MidnightMods is offline
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need to confirm fuel pressure in the rail while cranking before anything. if its not 2200psi+ injectors won't fire. main 3 reasons is old battery, bad fuel sensor at the back of the rail. or crap in the starter motor/ bad starter
Old 25-01-2019
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