Question about 1994 Jeep Grand Cherokee
When i switch on the ingnition key there is only cranking, i check the input fuel line is ok (fuel pressure). Furthere more i check the ignition coil side and found the current coming out of it is very very small (check for arc). Ignition coil resistance is 1.1 ohms, is it normal? Was not able to check the input supply of the coil since by bateery now is down. Pleasant day and thank you for any assistance you can extend to me.
Remove one plug wire from an easily accessable plug. Stick a short screw or any metal thing that fits into the boot (where the plug usually is) and hold it near (abolut quarter of an inch) the block while someone turns the engine over. If you get no spark or weak spark, repeat, using dist cap end of coil wire. If good there, check cap and rotor for dampness or carbon tracking. If no spark, check +side of coil for voltage (should be close to batt voltage with key on.) If voltage Ok check output from crank/flywheel sensor. (they go bad frequently) If good, change coil. In all cases, spark should be able to bridge a gap at least on half inch. Blue spark is best but a healthy orange one is ok. there are more complicated things that can be involved but these are most common.
(I use plastic handle pliers to hold wire to avoid a bad shock)
Posted on Nov 07, 2008
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Posted on Jan 02, 2017
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