2007 Jeep Liberty Turns Over, Won't Start - JeepForum.com
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post #1 of 6 Old 10-26-2017, 08:14 AM Thread Starter
Mgiffune
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2007 Jeep Liberty Turns Over, Won't Start

2007 Jeep Liberty Turns Over strong.

Ran fine 45 minutes prior.

I don't hear the fuel pump when I initial turn the key.

How do I jump the fuel pump relay, or is there another way to test it?

Anything else I should look for initially? Should I be checking the ASD relay first, and how do I test it?

New to troubleshooting this vehicle.

Thanks!

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post #2 of 6 Old 10-26-2017, 08:52 AM
jtec
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check fuel pressure - with a gauge.
Check for codes - even if light is off.

Try this as someone tries to start vehicle spray carb cleaner into TB - does it try to run on the spray?

TEST ASD - KOEO is there 12v at injectors? coils?
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post #3 of 6 Old 10-26-2017, 11:54 AM Thread Starter
Mgiffune
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I don't have a code reader or a gauge to check fuel pressure. I will check the other things.
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post #4 of 6 Old 10-26-2017, 04:20 PM Thread Starter
Mgiffune
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I swapped the fuel pump relay with the wiper relay, and the auto shut down relay with the radiator fan relay.

No change in symptoms.

Is this enough to tell me that the relays are not the problem?

Also, I sprayed carb cleaner into the throttle body, and it ran as long as the spray continued.

Last edited by Mgiffune; 10-26-2017 at 04:55 PM.
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post #5 of 6 Old 10-27-2017, 05:35 AM
Billwill
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You can remove the Fuel Pump Relay and inside the empty relay socket locate pins 30 and 87 and jumper them together...you should hear the pump run.

You should have the red LED for the SKIS antitheft system light up for a few seconds when ignition is turned ON...this LED should then go out if SKIS is working properly. If the LED flashes then the Jeep will fire up and then shutdown after a few seconds. If this SKIS LED stays ON the engine will turn over but not fire.

You need some codes to be read out....could be crank or cam sensor...these sometimes fail when engine is hot.

2002 2.5 Export CRD Manual 5 speed.
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post #6 of 6 Old 10-27-2017, 03:11 PM Thread Starter
Mgiffune
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Closing this one out.

Fuel pump was bad.

Thanks for the direction everyone.
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