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

Check as soon as you come to overheating position whether at that time the fan is blowing. If not check for the fan switch,if is working or not.If the fan is blowing then switch the engine off and with the fan not in operation try slowly and carefully not to burn your hands touch the radiator ventilating core surface to all sides on the radiator whether are all on the same temperature feeling. If not means that the radiator is blogged or the thermostat is blogged.If is everything in working order,let the radiator to cool down and slowly and carefully remove the radiator cap or the radiator expansion tank cap and start the engine in idle and follow the water if is rotating. If not you have to check for your water pump if is working might have worn blades. Another possibility is the radiator or expansion tank cap faulty. Hope this helps. Good Luck.

I had one of these vans. They are fantastic for space, but commonly have electrical issues. The head lights are a single unit, and if you want to replace a bulb, the Whole unit has to be removed. There are several screws located on the top and bottom of the unit, that must come out. Then it slides out easily. Replace your bulb/s then reverse.

For the 2003 Mazda MPV 3.0L V6:

Firing Order:
1-4-2-5-3-6

Cylinders:
........(back).......
|...1....2....3...|
........................
|...4....5....6...|
.......(front)

Let me know if this helped.....

If it were mine... well, it's getting late in the season. Unless you live in a much hotter climate than I do, I'd leave it just like it is for the rest of the season. You may not even own that car next year.

Fuel injected or carby.

u may want to check bulbs first but the turn signals have a relay in fuse box

Make sure that your drive belt and ac belts are tight. A loose belt will look like many problems. Also could be your ac compressor. They have ac compressor lubrication in a can just like the freon. You can notice the extra strain the ac puts on the engine when you turn it on and especially at idle. So 1. Make sure belts are tight and in good condition, if not replace. 2. Check freon level in ac. If freon level is okay add ac oil conditioner.

check A/c compressor for seizure. if not stuck that, then the engine lacks power or the ISC is stuck.

I do not know about newer cars, but on my old standard ignition Ford, I found that the timing advance was not working (bad vacuum advance). On yours it would most probably be caused by a bad sensor associated with speed inputs to the computer. A quick readout of computer diagnostics will probably lead you to the problem. I hope this is helpful to you.