Question about 2000 Cadillac DeVille
The most common overheating problem with the Northstar engine is a blocked purge line. It's job is to purge air out of the cooling system.
There is a small diameter hose coming from near the top of the coolant tank,this is the purge line.
With the engine idling,pull the purge line from the tank,if there is no coolant flow from this small hose,it is blocked and this will cause overheating.If the hose is clear, check for blockage at the nipple on the tank.Or trace the hose back until you find the blockage.The hose goes in to the engine to a crossover and comes out the other side to near the thermostat housing,the blockage may be there.
Posted on Mar 09, 2010
SOURCE: Very High Idle speed
no prob not and i had the exact same problem and bought the part from advance auto it was like $80 and it's a diy thing i'm an 18 year old female and could do it my self just need the part and 6 star screw driver...it's right there on the right side when you open the hood
Posted on Mar 17, 2010
throttle position sensor replace it. also in rare cases the map sensor will be bad . go to a junk yard and get your replacements it wont cost near as mutch. compared to the retail stores
Posted on Apr 03, 2010
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