Question about Jeep Liberty
It was a little slow to crank lately I thought because it is now winter, maybe a weak battery from not driving it daily. It died while driving in a parking lot. Cranks, but not starting. Wore down battery, jumped it without luck of starting, and recharged it again without start. Tried starting fluid into intake but still not starting. Check engine light indicated emission canister previous to not starting. History of Jeep: new plugs due to misfire code and flushed coolant 2 months ago. Check engine codes now read no codes found. I did switch some relay fuses, fuel with wiper, no change. Wipers still work and no starting.
Posted by Anonymous on
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Posted on Jan 02, 2017
have you checked all ofyour fuses? usually when you hook up a battery backwads you end up blowing a fuse and or fry your alternator on older modeled vehicles as there is no protection for it.
Posted on Oct 18, 2008
You can try to test the relay for function by swapping it with a known good working relay. If this does not work, you can put a jumper between the terminals that energize the pump (relay removed, ignition off). (On the Bosch Jetronic systems I used to work on, the pump would energize even with the ignition off). If there is still no sound, briefly turn the ignition on, and listen for the pump to energize. If you heard nothing, assume the pump is defective. I found most fuel pump problems and failures to occur in vehicles with 125,000 to 175,000 miles of use.
You may also try to check the Hall effect sensor ( a magnetic pulse detector that controls both spark and fuel flow) located within the distributor body (where the spark-plug wires attach to the distributor.
And finally, if that is good, check the ignition module within the distributor. It's a sealed transistorized circuit bolted to the inside of the distributor body with 5mm bolts.
Posted on Mar 26, 2009
If the data link is not talking to the computer check your ground at the computer and at the data link connector to see if the computer is even alive ground pin 3 on DLC with the key off then turn key to the run position if it flashes the check engine codes record them, if no engine light, does the engine light come on when you turn the key on then go off? if not, check fuses if not check power for pin on computer, if it has power you have a bad computer. But TEST THE GROUNDS IT IS THE BIGGEST FAILURE For these rigs or any manufacture. check that you have power also at the DLC too. if not you need a digital ohm meter and a subscription to http:///.www.alldatadiy.com and start reading the campaigns on that vechile for computer and trouble tree for dead DLC and computer. I don't have that subscription or I could tell you more where to look, if you need anymore help let me know. Also if the crank sensor could cause it not to run the fuel pump but so can the cam sensor. You need to find out if the computer gets it's pulse for the pump at the computer if it does then you need to test them both. There are three wires a ground a colored power wire and a wire to go to the computer you can test these sensors with a meter to see if there is a pulse to each. sometimes the fuel pump gets it's signal from the coil pack so it's important to have the subscription, you can do a search for each item and test them as needed and has a wiring diagram.
Posted on Jul 27, 2009
There may be no injector pulse if the computor does not see a RPM signal.
There will be no spark if the ignition module does not see a dist pulse from the dist pickup.......a RPM signal.
Because you do not have both ......I would suggest to check/change the dist pick up.
Follow the wires from the ignition module inside the dist to the pickup which is also inside the dist.
If it is just a bad dist pickup....keep all your old parts as good spares.
Also...is the dist turning? to provide a RPM signal?
You will have to remove the dist to change the pick-up.....mark your timing locations......"rotor position" and "dist body location"before removal.
A quick test before installing the "repaired dist" .....plug it in the the truck wiring and turn on the key....DO NOT CRANK THE ENGINE OR YOU WILL LOSE YOUR DIST ROTOR CORRECT POSITION......as you spin the dist by hand .....the injectors should spray.
Posted on Aug 23, 2009
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