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Jeep Wrangler YJ
YJ General Discussion
Idle drops when I coast in neutral
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<blockquote data-quote="deadpool1" data-source="post: 439324" data-attributes="member: 21229"><p>Hello Louie</p><p>what is under this hood.? <strong> what year Yj,</strong> 4cylinder or the inline 6. (3 engines used) a/t or m;/t gear box?</p><p>500rpm if spark is good and fuel good. (is it a daily driver or found in barn all crusty?)<<< bad fuel>/?</p><p>500 means IAC is dead on injected engine, is it? or is this a 1987 carb monster.</p><p>500 RPM on the most old engines had that nasty EGR that sticks open</p><p>please fill out profile and tell drive train. so helpers do not guess and lead you astray.</p><p>and jeeps have this habit (open hood , and huge shock,OMG what is there?, wow that is not stock.!?</p><p>the fire well VIN decodes online to say what was there new. google FREE vin decoder.</p><p>or the service manual free has it too, under VIN page.</p><p>good luck?</p><p>the automatic in DRIVE uses more energy than Neutral.</p><p>the PCM controls the IAC at all times, if not injected there is no IAC (idle air controller)</p><p>There are no PCM idle adjustments (by law) but on carbs YES. The PCM has tables for hot/coldde and neutral and DRIVE if A/T is there)</p><p>on carb the settings are all very different. (do tell if is carb)</p><p></p><p>so how did you set 750rpm , what method,?</p></blockquote><p></p>
[QUOTE="deadpool1, post: 439324, member: 21229"] Hello Louie what is under this hood.? [B] what year Yj,[/B] 4cylinder or the inline 6. (3 engines used) a/t or m;/t gear box? 500rpm if spark is good and fuel good. (is it a daily driver or found in barn all crusty?)<<< bad fuel>/? 500 means IAC is dead on injected engine, is it? or is this a 1987 carb monster. 500 RPM on the most old engines had that nasty EGR that sticks open please fill out profile and tell drive train. so helpers do not guess and lead you astray. and jeeps have this habit (open hood , and huge shock,OMG what is there?, wow that is not stock.!? the fire well VIN decodes online to say what was there new. google FREE vin decoder. or the service manual free has it too, under VIN page. good luck? the automatic in DRIVE uses more energy than Neutral. the PCM controls the IAC at all times, if not injected there is no IAC (idle air controller) There are no PCM idle adjustments (by law) but on carbs YES. The PCM has tables for hot/coldde and neutral and DRIVE if A/T is there) on carb the settings are all very different. (do tell if is carb) so how did you set 750rpm , what method,? [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
Idle drops when I coast in neutral
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