20 Most Recent 2003 Mazda Protege - Page 4 Questions & Answers

start with a full tune up and oil change. dont forget to change air filter also

check behind your turnsignal indicator light sometimes there is also one or more screws there hope this helps

sounds like two seperate problems need more info to try to help

Reversing the battery connections can cause any electric components to fail, like the computer(ecu). Does the car crank but wont start? Do you have an obd device?

Could have blown a head gasket and now have liquid coolant in one cylinder.

It won't cause any overheating, that fan is only suppose to come on when the a/c is on. Since it's cold, it's not going to come on because the engine has at least 2 sensors that tell the temp and it can see it's not needed. Now, if you turn it on during the summer and it doesn't come on and your a/c doesn't work, you may have blown the relay or your a/c may be low/out.

I purchased a used 2003 Mazda Protege w/170k on it. I knew it had a rod knocking at the time. It was still running. I bought a used motor 35k from Japan. I swapped everything But could never get it to run. I took it to the Mazda dealer (why not just flush cash in the toilet) They lied and said it needed a new computer. Finally discovered that the harmonic balancer / lower pulley had Japanies spline for the crank position sensor. It ran great after I put the old pully on. In the intake the butterfly valves had come lose and fallen into the intake valves and shredded and then gotten into the crank. If you are hearing rattling remove your intake and you will find the butterfly valves have come loose.