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P1506 obd code question

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  #1  
Old 02-07-2009, 09:56 PM
uno uno is offline
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P1506 obd code question

After getting p1506 overspeed code. Replaced iac and still have higher than spec idle ( 1100 + - ) and restarted the truck after disconnecting the battery and code is gone but high idle is still about 1100. Anyone have an idea what iam missing checked some of the top side vac hoses and they seem good.
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Old 02-09-2009, 07:23 PM
Gevans17 Gevans17 is offline
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1506

try cleaning your throttle body
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Old 02-09-2009, 08:14 PM
alloro alloro is offline
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I'd say look a little more for a vacuum leak.
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Old 02-12-2009, 09:25 PM
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i THINK its a vacum leak, hard to hear the spot. replaced the IAC hoping that was it. base idle should be 780 in nuetral. idles at 1100 nuetral,750-800 in gear and lower with air - point me in the right direction pls. ever had the same type problem yourself ?
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Old 02-12-2009, 11:34 PM
alloro alloro is offline
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I've had this problem on other vehicles in the past and it was always a vacuum leak.
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Old 02-13-2009, 07:06 AM
projectSHO89 projectSHO89 is offline
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Drive it for a few weeks until the MIL comes back on and then re-scan it. The new fault code should give you better guidance.

Steve
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Old 02-21-2009, 06:44 PM
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hey alloro, getting back to you after new IAC and TPS code cleared..........now its back with an idle at 1100 rpm, please help if you know a good spot to check for vac leak.....or ?
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Old 02-22-2009, 12:41 PM
alloro alloro is offline
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Did you try disconnecting the battery for 10 minutes to clear out the previous idle parameters?
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Old 02-22-2009, 07:57 PM
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Thumbs up solved

after a new TPS and IAC.......my only problem was the PCV, base idle 600-650, for a whopping $3 ( finacing available with approved credit ) haha
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Old 02-22-2009, 09:01 PM
alloro alloro is offline
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Ahh so it was a vacuum leak after all.
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Old 02-22-2009, 09:01 PM
 
 
 
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