20 Most Recent 1990 Mazda Protege Questions & Answers

After all those works did they bleed the cooling system
Id test the coolant temp sensor if you havnt done so already

1990 Mazda... | Answered on Sep 24, 2017

I found this info for horn relay.
If more than one relay, hopefully you can see wiring colors at relay, then look at horn relay wiring diagram and match the wire colors to the
I'd check applicable fuses first. Any electrical circuit needs voltage and ground.

1990 Mazda... | Answered on Apr 27, 2016

Fuel is metered to the injectors based on a signal from the Engine coolant sensor. When the sensor goes bad usually the engine is slow to start. turn off and it start as normal. A cold engine signal will cause a rich supply causing smoking and misfire when the engine is at operating temperature. The gauge may read right but that does not mean the sensor is sending the right signal to the computer.

1990 Mazda... | Answered on Sep 10, 2014

PAG oil is best if its totally empty 40 ml will do

1990 Mazda... | Answered on Apr 07, 2014

run the engine at fast idle run the ac in maximum cooling and after a few minutes check the sight glass if bubbles present in the sight glass there is insufficient amount of refrigerant you'll need to recharge freon and about 10 ml of refrigerant oil PAG is best.

1990 Mazda... | Answered on Apr 07, 2014

check relay then starter.

1990 Mazda... | Answered on Dec 19, 2013

Remove the return hose at the pump & add a
piece of tubing & put into a bottle under car

Remove the injector fuse & crank engine to
flush out fluid until clean

Just as with brakes -- don't let the reservoir run dry

1990 Mazda... | Answered on Oct 20, 2012

Sounds like your water-pump bearings are siezed. Check how many pulleys the belt goes around... the very bottom one will be the crankshaft. That'll be very stiff (normal)... but any others will be the alternator, the water-pump, or even the power-steering pump. These pulleys should turn freely by hand.

1990 Mazda... | Answered on Oct 10, 2012

Look from the outside of the driver window and take down the vin number and give that info to the parts store clerk and it will give them all the info they need

1990 Mazda... | Answered on Jul 20, 2012

I have gotten away with it with a 1992 Mustang. Some people will tell you that you have to replace the seals in the whole system but you may not need to worry about it for as long as you own the car. Just replace them if you need to down the road and save your money now.
There is a difference in the weight of the oil in the different types of refrigerant. The converted systems never seem to cool as well as the old refrigerant but once your car is cooled then it stays cool in most cases.
I had my Mustang for 5 years after the conversion and it worked up until the day I sold it. I live in FL

1990 Mazda... | Answered on Aug 29, 2011

Your Protege has a dedicated fuse for the tailight circuit, as well as a relay. The fuse should be located in the passenger compartment fuse box, but it could be located in the main fuse box in the engine compartment drivers side inside fender area. It should be labeled TAILIGHT, and be 15A, or 20A. The relay is most likely in the main fuse box as well, but I can't tell from the attached drawing so you'll have to track it down if necessary.

Click here to enlarge.

1990 Mazda... | Answered on Mar 21, 2011

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