I have a 1997 chevy lumina 3.1.the car has 146,100 miles.It has been running rough and lose of power.I changed the EGR valve no luck.I noticed when changing the spark plugs they had a white residue on them.Around the same time another probem started to occure.When in idle the car will start to run hot the radiator fans dont seem to be coming on.Is there a sensor that could be bad.

SOURCE: Running "rough"

I had the same issue with my venture. It turned out to be the number 5 plug wire, backside of engine ended up breaking out of the plug carrier and burning in half on the manifold. Your best bet is to trace all the wires to start off with and change the plugs. If that doesn't help, it may be internal. Good luck

SOURCE: 2000 chevy lumina. Is fan supposed to come on when car started

no fan comes on when engine cold start up .but it will come on when you turn on air conditioning or defrost on .if engine idling a while when temp get 190 degree the fan will kick on.if over heating you got air in system .wait until cools check coolant add more .crank engine let it idle few. minutes when start warming up turn off engine wait a while before removing radiator cap so you wont get scald.add more coolant .crank it again starting warming up turn off engine wait a while .add coolant .keep doing this procedure until your coolant stop dropping off .if you do this more than 6 times you got a leak some where.check crank level for signs.if oil level higher than normal.if everything looking good.when engine cool make sure add coolant to over flow jug cold level mark.

Marvin

• 85242 Answers
• Posted on Sep 16, 2009

SOURCE: I have a 1994 chevy s10 pickup. When you start it

what is the trouble code for the check engine light? to run the trouble code test and get that code from the computers memory go to the link and follow the instructions, post the trouble code back here.
http://check-engine-light-codes.blogspot.com/2006/03/gm-1983-95-vehicles-obd1-codes-self.html

SOURCE: 1990 chevy lumina, idling problem... to rich.... stalling......

check egr valve for vacuum leak. pull hose from manifold. put hose in your mouth like a straw and **** on it. if the valve moves, then it's good. if it doesn't, you need a new egr valve. WARNING, they are fricking expensive! auto zone price $204. NO JOKE

SOURCE: 1998 chevy blazer running really rough. It used

I had a similar problem and just happened to unplug the temperature sensor for the computer and the engine started running smooth.
So I replaced the temperature sensor and all was well!