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Re: Fuelie Loads up when cold--HELP
Bad coolant temp sensors can make the system run rich cold or lean cold. If you can get your hands on a scan tool, check to see if the coolant temp and the outside temp are close to one another before cold start. If the oudside temp is 40° and the coolant temp reads -10° then you need to replace the coolant temp sensor. On start up the O2 does not control the fuel mixture until the system goes into closed loop, IAC just regulates the idle speed and has no effect on amount of fuel going into the engine.
Another area to look at is the vacuum hose too the MAP sensor and if the MAP sensor can fail causing a rich condition, but it usually will happen all the time not only when the engine is cold.
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02-16-2012, 07:38 PM
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