The car I'm working on is a 2000 oldsmobile alero 4 door automatic 2.4L Shortly after the car started to stall out it was limped home. where it was noticed to be 2 quarts low on oil, put the oil in runs fine. Go to check under the spark plug cap on the motor looked alright, put it back starts misfiring. Threw in new Spark plugs made sure everything was reinstalled correctly and it's still acting up just as badly with misfires.
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If you are looking for some sort of water valve that diverts water to/from the heater core, forget it. They don't exist anymore. They went away shortly after the widely adapted use of air conditioning in today's modern cars. Now, hot coolant is routed thru the heater core at all times, but is controlled by a cable-operated, or vacuum operated "blend door" located inside the heater box. If you are not getting heat to the vehicle, there are a few possible problems:
1. Bad thermostat - thus low coolant temperature and lack of heat.
2. Clogged heater core - no water flow thru core, thus no heat.
3. Broken control head - loss of cable or vacuum actuation of blend door.
4. Broken heater box/vacuum tank - no actuation of blend door.
Of the items listed above, based on the age of the vehicle and the likelihood of occurrence, I would investigate them in the order of 2, 4, 1, 3.
if it's a V6 then you prob have intake gskts/head gskts leaking coolant to cylinder and causing it to hydro lock, filling cylinder with coolant and filling radiator with cylinder pressure causing coolant to blow out of radiator and reduces your cooling of engine.....see a mechanic looking at a big repair bill or engine swap
IF YOU DONT SEE PLUGS WIRES RUNNING DOWN SIDE CYLINDER BLOCK TO SPARK PLUGS.YOUR SPARK PLUGS HAS COILS SETTING ON TOP OF THEM.YOU HAVE A INDIVIDUAL COIL FOR EACH CYLINDER.SOME ENGINES HAS SPARK PLUGS IN VALVE COVERS LIKE CADILAC.SOME ENGINE SPARK PLUGS UNDER ENGINE HEAD COVER WITH COILS ON TOP OF SPARK PLUGS.
The EGR valve and MAP sensor are indeed different and unrelated parts. An EGR valve that is stuck open can however cause the system to set a false MAP sensor code due to the loss of vacuum in the intake which will cause the sensor to read low but the engine should run very bad, if at all, when this happens. The MAP sensor is located slightly to the drivers side of the throttle body housing on the front side of the motor and is easy to replace. I'd make sure that your EGR valve isn't stuck open or that you don't have another large vacuum leak that could mimic a faulty MAP sensor before replacing it however. Hope this helps a bit and good luck!
SOUND LIKE EVAP PURGE VALVE CONTROL SOLENOID GONE BAD ITS LOCATION ON THE 4 CYLINDER ENGINES IS ON A BRACKET NEAR THE AC COMPRESSOR AND 6 CYLINDER ENGINE ITS LOCATION.NEAR REAR FIREWALL SIDE CYLINDER HEAD BELOW THE IGNITION COILS.CHECK THE EVAP PURGE VALVE CONTROL SOLENOID FUSE AND IT WIRES AND CONNECTOR BEFORE BUYING A NEW ONE.