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Jeep Wrangler YJ
YJ General Discussion
Couple questions about new YJ and engine code
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<blockquote data-quote="Gary747" data-source="post: 428335" data-attributes="member: 19207"><p>Carburetor... if it ain't broke, don't fix it. 600 CFM is the capability, but the engine won't draw more airflow than it needs. As for piston ring wash, well, for that to happen the fuel system would have to be operating amazingly rich. It's possible... I've seen engines running so rich that there was a little flame at the tailpipe. In fact, I used to be able to induce that phenomenon by applying manual choke while driving down the road. BUT, if you were running that rich, there is no way you could make statements like "It runs good with more pep than others I've had in the past". Your spark plugs and tailpipe would show over-rich carbon residue. The Jeep would run terrible and your fuel mileage would be way down. I'm sure there are adjustments to optimize your fuel/air ratio if required.</p><p></p><p>It looks like you have an electric automatic choke... if your cold starts are good and the choke fully opens when the engine is warm, you are likely good to go with your current set-up.</p></blockquote><p></p>
[QUOTE="Gary747, post: 428335, member: 19207"] Carburetor... if it ain't broke, don't fix it. 600 CFM is the capability, but the engine won't draw more airflow than it needs. As for piston ring wash, well, for that to happen the fuel system would have to be operating amazingly rich. It's possible... I've seen engines running so rich that there was a little flame at the tailpipe. In fact, I used to be able to induce that phenomenon by applying manual choke while driving down the road. BUT, if you were running that rich, there is no way you could make statements like "It runs good with more pep than others I've had in the past". Your spark plugs and tailpipe would show over-rich carbon residue. The Jeep would run terrible and your fuel mileage would be way down. I'm sure there are adjustments to optimize your fuel/air ratio if required. It looks like you have an electric automatic choke... if your cold starts are good and the choke fully opens when the engine is warm, you are likely good to go with your current set-up. [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
Couple questions about new YJ and engine code
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