Xj crank no start when temp drop

[sbjuice]

96 cherokee sport

I am new here so I apologize in advance if this is posted in the wrong location

I am having issues with a crank no start when the temp changes or gets colder. It doesn't need to be below freeze just a big enough drop. Other times it starts fine. I have replaced the battery, all new cables, new starter, new crank position censor.

I'm not really sure what to check since it is just when it's cold or colder. So it is hard to track down and when I get it to start I just forget about. I am going to get a pressure gauge on her to see if it's fuel. I did replace the filter. Also replace the injectors.

Thank you in advance for any help or tips.

 

[Tim_MN]

Suspect a low voltage issue from:

• dirty, corroded, damaged, or loose battery terminal or start/charge wire connections
• confirm all of the grounds under the hood are clean and tight
• internally corroded battery wires
• a short circuit or parasitic drain
• a failing battery
• a failing alternator
• leaving the lights on

Perform routine maintenance of the start and charge systems. Remove, clean, and firmly reconnect all the wires and cables to the battery, starter, and alternator. Look for corroded or damaged cables or connectors and replace as needed. Copper wires should be copper color, not black or green. Battery terminals and battery wire connectors should bright silver, not dull gray/black and corroded. Do the same for the grounding wires from the starter to engine block, the ground wires at the coil, and the ground wires from the battery and engine to the Jeep's frame/body. You must remove, wire brush, and clean until shiny the cable/wire ends and whatever they bolt onto.

Jeeps do not tolerate low voltage, bad wire connections, or poor grounds.


Place your DVOM (Digital Volt Ohm Multi-Meter) on the 20 volt scale. First check battery voltage by placing your multi-meter's positive lead on the battery's positive post ( the actual post, not the clamp ) and the negative lead on the negative post. You need a minimum of 12 volts to continue testing. Next, leave your meter connected and take a reading while the engine is cranking. Record this voltage reading. Now connect your positive lead to the battery terminal stud on the starter and the negative lead to the starter housing. Again, crank the engine and record the voltage reading. If the voltage reading at the starter is not within 1 volt of battery voltage then you have excessive voltage drop in the starter circuit.

Typical voltage drop maximums:
• starter circuit (including starter solenoid) = 0.60 volt
• battery post to battery terminal end = zero volts
• battery main cable (measured end to end) 0.20 volt
• starter solenoid = 0.20 volt
• battery negative post to alternator metal frame = 0.20 volt
• negative main cable to engine block = 0.20 volt
• negative battery post to starter metal frame = 0.30
• battery positive post to alternator b+stud = 0.5 volt with maximum charging load applied (all accessories turned on)

Have your helper turn the ignition key to START while you tap gently on the starter with a hammer. If the engine starts, you probably need a new starter.