Question about Jeep Grand Cherokee
The issue lies with any of the following three things 1) can sensor 2) crank sensor and 3) ignition coil. Check the quality of the spark at the plugs as a way to check on the coil output. Next some Jeeps have one coil per two plugs and some have coil on plug. If you have one coil per two plugs disconnect the two plug leads to one of the coils (on four cylinder engine they are arranged plugs 1 + 4 on one coil and plugs 2 + 3 on the other coil). Turn the engine over and sparks should jump between the terminals on the coil. If this happens the crank sensor continuity is OK and that it is detecting crank position, if not then this a strong indication that something is wrong with it. Check it for cracks and check the wiring all the way back to the ECU and check the connection is clean. Replace it if suspect. Now physically check the cam sensor. Any cracks or distortion in the body of the device replace it. Check connections and wiring back to the ECU. Generally the cam sensor goes wrong when the engine is hot. If you get random shut down even when starting up this indicates that it is more likely to be the crank sensor or coil.
Posted on Sep 08, 2010
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Posted on Jan 02, 2017
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