Engine Cooling problem
1996 Mazda 626 4 cyl Two Wheel Drive Manual 150000 miles
My 1996 Mazda 626 is doing a few strange things.
When the weather turns cold the car revs up and down between 1500 and 2500 rpms very rapidly while I sit idle. This will go away after it warms up and I drive it past 3rd gear, but will often return when I am in stop and go traffic. After I get off the highway and sit at a stop sign or stoplight it will worsen when I start moving again. It also is very jerky when I'm in 1st, 2nd or 3rd. I've read that this may be an oxygen sensor problem?
Also, the car seems to start overheating when I have the heat on. I don't think it's actually overheating because the minute I turn the heater off the temperature drops back to normal within 10 seconds.
I currently have a small crack in the radiator and have to add fluid more often then normal (maybe once to twice between oil changes). I added some radiator leak sealent today and some fresh antifreeze. The car idles much better and is not jerking in low gears, but I still am having a problem with the thermostat rising while the heat is on. I have no idea what's wrong, but it seems like it may be a combination of a few things. Help! I live in Minnesota and it's cold! I need the heater! I don't seem to have this problem in the summer.
have the same problem?
Tuesday, November 18th, 2008 AT 8:35 PM