Question about Jeep Cars & Trucks
My 2008 Jeep Liberty limited randomly doesn’t start. It doesn’t do it all the time. It seems when the weather is warmer and I run multiple errands and start and stop it multiple times it won’t start. The engine turns over but it doesn’t start. When I let it sit about 30 mins then it will start again. I was told it could be the fuel relay switch or fuel pump fuse but probably not the fuel pump. My mechanic is having a hard time locating the fuel relay. Where is it located? Any ideas what else it could be? It runs great otherwise.
Sorry ,but you need a better mechanic . This wouldn't be the relay .if it was the relay it would do it all the time . Hooking up a professional scan tool an checking sensor input data to the PCM- engine computer is what should be done . What are the fuel trims at ? short & long trims , are the O2 sensors switching normally , what's the mass airflow sensor data ? any codes stored . It just so happens the relay on your vehicle is a PCB relay . Printed circuit board relay . Which means it's inside the under hood fuse , soldered to the circuit board . Do yourself a favor an take it to a qualified repair shop.
Posted on Mar 21, 2019
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Posted on Jan 02, 2017
how cold is it? below 32 degrees any water in your fuel will turn to ice the particles could clog your filter or freeze in the line try adding adding liquid heet its isoppropyl alcohol it will help
Posted on Jan 14, 2009
good old ford lol, try looking at the crank sensor its located at the front of the engine tucked in right hand side of exhaust manifold and gearbox, two pin plug, i have also known these to have no end of faults with the fusebox.
easy to remove, and solder the connections inside they all suffer eventually, if your not to handy with cars i recommend taking to a auto electrician, easy if you know how. Good luck Davelee
Posted on Mar 24, 2009
I checked all of the fuseable links and they were all good. Next I decided to check all the power wires to the ECM and also the grounds from a wiring diagram because the Mil is controlled by the ecm and the bulb was good. The ecm is located behind the glove box. Bingo, the orange wire was only reading 3-5 volts at the ECM, but 12.5 volts after the fuseable link at the underhood fuse block (passenger side firewall). I ran a temp wire directly from after the fuseable link to the orange wire at the ecm and the ecm turned back on and the Mil or "check engine soon" light came on too. The truck started up and has never run smoother.
Note that at first the truck just stalled out and I could restart it right away with no error codes. Eventually the stalling became more frequent with longer reset times required. Once it threw a "code 54" and I thought it was fuel related as each time the gas stopped and I could still start the truck with gas poured into the TB. Ignition ok. My fuel pump turned on and ran if I tested it. I even checked the pressure regulator and the fuel filter to no avail.The orange wire that powers up the ecm is technically part or the fuel pump relay circuit as it also feeds the fuel pump relay 12.5 volts all the time. The thin orange wire from the fuse block is joined to two other thin orange wires in the large group of wires that heads to the ecm along the firewall behind the engine. I had to dig it out of the many wires to find it and remove a lot of tape. It is amazing to me that this one little orange wire could cause so much grief and be so hard to track down. I could not have afforded to take this problem to the Dealer.
Posted on Mar 26, 2009
Hello, I would assume this is your fuel pump inside your tank. I would first however do some basics like a general tuneup. For starters I would replace your spark plugs and wires, rotary cap and button and check your fuses. Run some injector cleaner through your system. You know quick simple cheap things before you get to the fuel pump inside the gas tank which can be kinda expensive. The warm up then dies can be caused by, "blownout or fouled," spark plugs. I hope this gives you a general direction in which to go. A sidenote is that coil packs do not normally run an igntion code and I for one do not like them becuase they are expensive.
Posted on May 20, 2009
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