Question about 1999 Jeep Grand Cherokee
An a test for spark be made with the coil rail off and the plugs removed from vehicle than put back onto rails?
Posted by Anonymous on
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Posted on Jan 02, 2017
Back up a minute...Do you have spark from the coil wire? (juice from coil) If so, change or check rotor and cap (wires do not all go bad at same time so unless they are wet, likely at least good enough to start engine)
Posted on Mar 05, 2009
OK...I have a 93 outside...one diagram I have shows an ignition module next to coil...but there is none on mine, (4.0 engine)
Two items to check are crank sensor and cam sensor inside distributor. Test procedure can be found in just about any manual including haynes.
You will need a decent volt/ohm meter to do testing. You can also check codes by turning ignition switch on/off three times, leaving it on the third time. Check engine will flash code #'s (ex: one flash, pause two flashes= the number twelve.then followed by a longer pause then another set of flashes etc.)
Posted on Mar 05, 2009
If computer sees no crank sensor signal it shuts down pulses to the injectors. But, you bring something new into the mix. Make sure fender grounding is good so the relay can operate properly and make sure power going to it is not restricted by a loose or dirty contact on the power side.
Posted on Oct 23, 2009
Testimonial: "Sounds like a good start"
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Nov 21, 2014 | 1999 Jeep Grand Cherokee
Jun 11, 2013 | 1999 Jeep Grand Cherokee
Locate the spark plug wires in the Cherokee cylinder head. In the 4.0 liter engine, the spark plugs are below the coil rail assembly. On the 4.7 liter engine, the spark plugs are located under each corresponding engine coil.
Read more: How to Replace Spark Plugs in a Jeep Grand Cherokee ' eHow.com http://www.ehow.com/how_4484626_replace-spark-plugs-jeep-grand.html#ixzz27zi6736d
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