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Jeep Wrangler YJ
YJ General Discussion
Jeep starts and idles for a minute, then sputters out
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<blockquote data-quote="Jackson LeBlanc" data-source="post: 438559" data-attributes="member: 21054"><p>I start my jeep, it turns over no problem, its a 6 cylinder 4.2 L from 87. once it starts, it runs fine for about a minute, then slowly sputters out, and when i press on the gas to keep it alive, it spits blackish grey smoke, and then i let it die. my dad and i think it is a vacuum leak, which is preventing air from getting into the engine block, and making the air fuel mixture too rich on fuel. I tried looking into the carburetor to see how the screws were adjusted, and they were adjusted just fine. I will note my dad when rebuilding the engine took out the idler air control valve, which may be causing this problem, but it ran fine without one for 2 years. I will also note that a tube connecting the air filter to the valve cover is loose, and there is a valve that is missing a cover, and has depressurized. there are 5 other of these little valves that all have covers on them and the one that is missing hasnt had one on there for a while.</p></blockquote><p></p>
[QUOTE="Jackson LeBlanc, post: 438559, member: 21054"] I start my jeep, it turns over no problem, its a 6 cylinder 4.2 L from 87. once it starts, it runs fine for about a minute, then slowly sputters out, and when i press on the gas to keep it alive, it spits blackish grey smoke, and then i let it die. my dad and i think it is a vacuum leak, which is preventing air from getting into the engine block, and making the air fuel mixture too rich on fuel. I tried looking into the carburetor to see how the screws were adjusted, and they were adjusted just fine. I will note my dad when rebuilding the engine took out the idler air control valve, which may be causing this problem, but it ran fine without one for 2 years. I will also note that a tube connecting the air filter to the valve cover is loose, and there is a valve that is missing a cover, and has depressurized. there are 5 other of these little valves that all have covers on them and the one that is missing hasnt had one on there for a while. [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
Jeep starts and idles for a minute, then sputters out
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