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Old 08-13-2012, 05:40 AM
kickstart kickstart is offline
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1997 Truck
 
Join Date: Dec 2011
Posts: 4
Default Engine wont rev past 2500 rpm

97 pickup 2.4 and auto tranny.Not good at explaining but here it goes.When engine is cold and first start up of the day it runs fine till engine reaches operating temp.Once it warms up it will not rev past 2500 acts like a rev limiter kicks in.Checked codes only one it has is MAF sensor p100.Replaced and checked all wires and connections related .I have checked for vaccum leaks and have none.What really confuses me is while the engine is running i can completely cover throttle body with my hand and it will not choke the engine down .it appears to me air is entering the engine somewhere past the throttle body but where? and only when engine is warmed up.When engine is cold it will cause it to die.
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