1997 Mazda 626

Engine Cooling problem
1997 Mazda 626 6 cyl Manual 301k miles

My check engine light has been on since I bought my car 2yrs ago. The cat converter is supposedly bad, but it hasn't messed up anything else so far. I recently got my a/c fixed. The next day my fuel pump was messed up. I got that changed along with the strainer. The next day the car wouldn't start up. I got a new crankshaft sensor and it worked again but it still had a bunch of codes like heated o2, oo range iat and maf. Then the alternator went bad. Got that replaced and the sensors went off. Then the car started overheating. I figured it was because I did a radiator flush and left it in a couple miles over and it probably clogged it up. Flushed the radiator like 20 different times, from the top 2 openings, the bottom hose, and the hose leading off the firewall headed to the thermostat incase it clogged up the heating coil. Car still is overheating and now the engine light is back on but is reading multiple engine misfires. Idk what could be the problem now. Possibly the thermostat and need of annual tune up? Had a tuneup last October when replaced the engine.


What were the trouble codes retrieved? The only code showing up is multiple cylinder misfire. The ones from b4 the alternator was fixed are heated o2 sensor bank 1 and 2, oor maf, oor iat,

When does the overheating occurs? I can't get 1 mile without it starting to get hot

Are the cooling fans turning on? Yes

Do you have coolant losses issues? Not any more. The water pump has been replaced twice. Also the harmonic balancer and camshaft sensor b/c of water damage from the 1st water pump leaking b4.

Was the system bled of air? Idk. Heat will come out when the heat is turned on and cool air will come out when the a/c is turned on.

Is the lower hose hot or cool? Warm. The top is hot. It is definitely not as hot as the top hose. No leaks anywhere.