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496 Mag HO - slight miss, poor mileage, loss in rpm

Old 08-14-2018, 07:41 AM
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I'm planning on changing my Idle Air Control (IAC), Crank Position Sensor (CPS) , and Spark plugs. Also cleaning my fuel boost pump screen and IAC muffler and then going to check my Throttle Position Sensor (TPS) to make sure I'm hitting 100% at WOT.

Last edited by Sunsation25NY; 08-14-2018 at 07:48 AM.
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Old 08-14-2018, 03:26 PM
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You better watch which IAC you use. I understand the Merc one is expensive. I can sell the OEM IAC and new OEM gasket inwhich is needed shipped to your door for 115. YOU NEED THE OEM GASKET along with the NEW IAC cause no one else has the gaskets period.
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Old 08-14-2018, 05:04 PM
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Originally Posted by BUP
You better watch which IAC you use. I understand the Merc one is expensive. I can sell the OEM IAC and new OEM gasket inwhich is needed shipped to your door for 115. YOU NEED THE OEM GASKET along with the NEW IAC cause no one else has the gaskets period.
I already ordered AC Delco 2131556 CPS and Motorcraft CX1766 IAC from Rock Auto. Then ordered IAC gasket and IAC muffler from my local dealer. Thanks for the heads up though. Any other suggestions?
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Old 08-14-2018, 10:47 PM
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My next suggestions per request --- Find the Rock Auto techline or their forums --- have to start messing with some of you guys - Yikes sorry man could not resist had to slide that in there. The door was open just had to - just had to -- just had to. .

Last edited by BUP; 08-14-2018 at 10:54 PM.
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