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1987 Wrangler ignition failure
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Hotrod19
New User
Nov 2, 2009, 8:58 AM
Post #1 of 8
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1987 Wrangler ignition failure
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1987 Jeep Wrangler(130K miles), 4.0L , Weber Carb. Standard shift. Engine cranks, but no spark, I changed the ignition module and coil, no help. There seem to br three major parts to the system; the distributor, ignition module and coil. There is voltage at the coil, but I want to check/test the dist. Any ideas using DVM, o'scope... . Thanks, Hotrod19
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Loren Champlain Sr
Veteran
/ Moderator
Nov 2, 2009, 7:52 PM
Post #2 of 8
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Re: 1987 Wrangler ignition failure
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Hotrod; Check the crank sensor.
Loren
SW Washington
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Hammer Time
Ultimate Carjunky
/ Moderator
Nov 3, 2009, 3:49 AM
Post #3 of 8
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Re: 1987 Wrangler ignition failure
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Are you sure about what engine you have. They didn't offer a 4.0 in an 87 Wrangler
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Hotrod19
New User
Nov 3, 2009, 5:22 AM
Post #4 of 8
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Re: 1987 Wrangler ignition failure
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I am not an expert, but I don't think a
carbureted engine has a crank sensor. I if did where is it located? Thanks
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Hotrod19
New User
Nov 3, 2009, 5:23 AM
Post #5 of 8
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Re: 1987 Wrangler ignition failure
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ok, 4.2 L.
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Hammer Time
Ultimate Carjunky
/ Moderator
Nov 3, 2009, 5:51 AM
Post #6 of 8
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Re: 1987 Wrangler ignition failure
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No, it doesn't have a crank sensor but it has a pick up coil in the distributor that does the same job as a crank sensor.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Hotrod19
New User
Nov 3, 2009, 5:53 AM
Post #7 of 8
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Re: 1987 Wrangler ignition failure
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Agreed. I am trying to find someone who knows how to test the distributor, such as pick up coil resistance.
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Hammer Time
Ultimate Carjunky
/ Moderator
Nov 3, 2009, 6:00 AM
Post #8 of 8
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Re: 1987 Wrangler ignition failure
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Measuring resistance will help but to be sure you need a portable lab scope to view the wave pattern. You could rig a noid light at the -side of the coil and a power supply to determine if the pick up is working also.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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