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Jeep Wrangler YJ
YJ General Discussion
1990 YJ 4.2 sometimes sparks and runs some time not.
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<blockquote data-quote="Jharp59" data-source="post: 429302" data-attributes="member: 19527"><p>1990 yj. Did a 4.2 nutter bypass, 2100 carb, new distributor cap, pickup. fires sometimes. I have driven it. Most no fire. I put a different ECM and it seems more sensitive to some issue with it sparking. When it runs it runs great. i cant see a crank position sensor anywhere. I bought Jeep with this problem. i have 12 volts to the coil and going to the distributor thru the coil wire to yop of distributor. I cant figure it out. It will start after the battery is unhooked sometimes and runs for a a bit this shuts off. Any advice?</p></blockquote><p></p>
[QUOTE="Jharp59, post: 429302, member: 19527"] 1990 yj. Did a 4.2 nutter bypass, 2100 carb, new distributor cap, pickup. fires sometimes. I have driven it. Most no fire. I put a different ECM and it seems more sensitive to some issue with it sparking. When it runs it runs great. i cant see a crank position sensor anywhere. I bought Jeep with this problem. i have 12 volts to the coil and going to the distributor thru the coil wire to yop of distributor. I cant figure it out. It will start after the battery is unhooked sometimes and runs for a a bit this shuts off. Any advice? [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
1990 YJ 4.2 sometimes sparks and runs some time not.
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