496 ho mag helppppppppp!!!!!!!!
07-31-2017, 12:12 PM
#21
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Join Date: Jul 2008
Location: Crystal Lake, IL
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IAC reporting what PWM % at idle and thru out rpms while running is ? not all sensors report faults - IAC a lot of times does not, for a jist, IAC for MERC 2001 and up can be a problem child. It is best to change them out especially if proper maintenance has not been done. You can test the connector with a volt meter. And there is proper installs for an IAC as well. Gasket and clean - flat surfaces are need - the hose needs to be clear and unrestricted and always a new IAC muffler once min per year. All intake tracts need to be clean for IAC longevity period.
09-24-2017, 06:12 PM
#22
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Exhaust leak casing engine to stumble at idle
so we have been trouble shooting a bad idle (worst when cold), after changing the iac, figrured bad gas, district cap, fuel water separators, its an exhaust leak between the riser and my tailpipes. The engine is ingesting exhaust fumes and its wreaking havoc at idle.. open the engine compartment send issue subsides. Going to add high temp gasket Sealant, and bet it will go away...
09-24-2017, 11:51 PM
#23
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so we have been trouble shooting a bad idle (worst when cold), after changing the iac, figrured bad gas, district cap, fuel water separators, its an exhaust leak between the riser and my tailpipes. The engine is ingesting exhaust fumes and its wreaking havoc at idle.. open the engine compartment send issue subsides. Going to add high temp gasket Sealant, and bet it will go away...
Exhaust Riser and tail leak - you would see water leaking as well ?
