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Jeep 4.0 high idle when warm... driving me crazy
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<blockquote data-quote="whatthe?" data-source="post: 1471975" data-attributes="member: 18890"><p>You really need a scan tool. You need to know what the O2 mV are and the block learn value is. Whats your fuel pressure? I would think your IAC is fine, the computer is trying to fix something by having it open. Can you block the IAC port to see if it idles down? I'm going through the same thing with an aftermarket EFI swap onto my 454, idles high in closed loop. It was running lean (high block learn) so I'm having a new PROM made. A scan tool is really needed.</p></blockquote><p></p>
[QUOTE="whatthe?, post: 1471975, member: 18890"] You really need a scan tool. You need to know what the O2 mV are and the block learn value is. Whats your fuel pressure? I would think your IAC is fine, the computer is trying to fix something by having it open. Can you block the IAC port to see if it idles down? I'm going through the same thing with an aftermarket EFI swap onto my 454, idles high in closed loop. It was running lean (high block learn) so I'm having a new PROM made. A scan tool is really needed. [/QUOTE]
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Jeep 4.0 high idle when warm... driving me crazy
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