Originally Posted by Bibi
Short of setting my Liberty 03 Jeep ablaze, I don't know what else to do. It cranks but just wouldn't start. I've changed the Sensors, serviced the engine, changed the fuel pump, checked all my wires which seem to be in order,and even bought a new battery. Everything seems to be in good order but the damn car has simply refused to start. I'm really frustrated here and need help urgently. My mechanic seems as confused and clueless as I am (even though he won't admit it.)
Dunno what to do anymore
Wow, there really are a lot of threads lately on this Forum and other KJ forums I frequent about 3.7 L KJs turning over and not starting!
Firstly, the ON/OFF sequence of getting codes out should be done rapidly and on the forth ON action the codes should read out.
The fact that you are getting fuel pressure would seem to indicate that the ASD relay is energizing but it is worth putting a meter onto the ASD relay to see that it is energizing and that the normally-open contact is closing and has power on both sides.
There is a large capacitor that sits across the spark plug coils to maintain a high voltage when the plugs fire. The fact that you have a poor spark may mean that the capacitor is dis-connected or has failed.
You may need to trace the wiring of the crankshaft sensor and the cam sensor all the way to the PCM in case there is a break.....if you need a link to a wiring diagram I can provide you with one.
I presume you do not have the SKIS light ON constantly or flashing?
This is the amber Key Symbol with a line through it on the left of the console...only present if you have the SKIS security system fitted.