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Unread 07-03-2012, 12:46 AM   #1
Kimiko
Registered User
2003 KJ Liberty 
 
Join Date: Apr 2012
Location: Brandon, FL
Posts: 4
Engine not starting

I have a Jeep Liberty 2003 with a 3.7 engine.

Here's what I've done so far.

I've recently repaired an engine that came with this used car I bought. Beforehand it was starting up but after the repair the car wouldn't fire. I repaired a bent valve and replaced the head.

I'd just like some idea of what could be wrong, any help or suggestions would be appreciated, thanks.

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Unread 07-03-2012, 06:57 AM   #2
streetglideok
Web Wheeler
2005 KJ Liberty 
 
Join Date: Jul 2011
Location: Colorado Springs, Colorado
Posts: 2,345
Need more information. You need fuel, air and spark for the engine to run. You've got air, but do you have compression? Do you have fuel pressure? Do the injectors work? Lastly, do you have spark? Get us some solid answers to those questions, then we can tell you where to go. Other then that, its going to be shotgun guessing.
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Unread 07-03-2012, 09:01 AM   #3
Kimiko
Registered User
2003 KJ Liberty 
 
Join Date: Apr 2012
Location: Brandon, FL
Posts: 4
I do have compression, fuel pressure, but the injectors aren't working but they were running before.
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Unread 07-03-2012, 08:43 PM   #4
streetglideok
Web Wheeler
2005 KJ Liberty 
 
Join Date: Jul 2011
Location: Colorado Springs, Colorado
Posts: 2,345
Which head did you replace, driverside, or passenger side? Passenger side has the cam sensor in it. If I remember right, earlier model 3.7L engines had a different config then the newer ones on the cam and crank toner rings for the sensors. Wrong one will cause issues, as the PCM cant identify cylinder 1
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