Question about Jeep Cherokee
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Posted on Jan 02, 2017
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
Has any one soled this yet???????? Because I have the the same prob. but mine is only when it is could out blow 65 it will start but I have to keep my foot on the gas like a carb with no choke
Posted on Dec 27, 2009
SOURCE: 93 jeep cherokee country 4.0
OK, here are all the things to check for.
Spark on all ignition wires,
compression test all cylinders,
good fuel(not old or contaminated),
injectors firing (have voltage pulse).
Is the crankcase flooded with fuel? Smell the oil. Drain it if it's full of gasoline and put in fresh oil.
I have seen spark plugs that have been flooded that won't fire, even if they look clean.
If the distributor cap and rotor are old...toss them, they are cheap to buy new. Old ones can crossfire internally and rotors can short to ground.
Putting your fuel pedal to the floor while cranking shuts off the fuel injectors. This is called "clear flood mode"
I am telling you this for two reasons.
One that it may be handy to get it started and two to tell you that a shorted throttle position sensor can cause a no start.
Are there any codes stored in the computer? If there is, start there. It may lead you to your no start issue.
There you are, a few ideas, I hope that one of these helps get you running again.
Thank you for using FixYa.
Posted on Nov 28, 2010
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