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Without more detailed info, it's kind of hard to diagnose. I would check the cooling system first, if it's getting too hot, the cars computer won't let it re-start because it would cause damage. How quickly does the engine temp rise?, and does it go past "normal"?, which is usually under 2/3 rd of the way up. If it's going into the "red" then overheating is the issue. Go to a parts store and pick up some "Radiator Flush" as well as enough coolant/anti-freeze to completely change it afterwards, you can get premixed stuff that you just pour in, but the regular stuff you water down yourself is a lot cheaper. Just be sure to follow the instructions on the bottle of "Flush" exactly, any deviation can make things worse. Other than that, assuming that overheating is not the problem, it may very well be the starter itself. My old Miata wouldn't start again until it cooled down because of that. Different starter from a junkyard and it was fixed. And one final thought, running some fuel injector cleaner through it might help, also could be build up from cheap gas. I hope some of that helps. Grimm
they say you cant mix different coolants but you can go to auto-zone etc, and buy a cheaper anti-freeze for general motors products. its a 50/50 mix for all gm cars and trucks.you can add this coolant to any brand of anti-freeze. its called universal type anti-freeze. to run a differant anti-freeze in it, you have to flush out complete engine and radiator because the dex-cool and the green stuff do not mix well and cause engine corrosion etc. dex-cool is reccomended for all chevy engines. good-day !
REPLACE AIR FILTER.CLEAN FUEL INJECTORS,CHECK TIRE PRESSURE.LOW TIRE PRESSURE WILL CAUSE LOT OF FUEL CONSUMPTION.CITY DRIVING WILL BURN LOT MORE GAS,STOPPING VECHICLE THEN GOING WILL CAUSE MORE GAS BURNING, YOU NEED POWER AND FUEL TO GET VECHICLE IN MOTION,BY IT BEING HOT WEATHER, USING AIR CONDITIONING TO KEEP COOL INSIDE WILL CAUSE MORE FUEL CONSUMPTION.
I usually recommend a cooling system overhaul to my customers. It can go a long way in preventing damage from cooling system failure. I replace the water pump and ALL cooling system hoses including heater hoses, bypass hoses and radiator hoses. Then I flush out the radiator and the heater core with all the hoses removed. I go to the dealer and ask them to get me every colling hose that goes on the car. They are a lot more expensive at the dealer, but my 36 years of experience has taught me that the aftermarket hoses don't fit correctly and many have to be modified to get them to fit and they don't last as long as original equipment. It can be a little expensive, but it is a LOT cheaper that having to replace an engine or buy a new car.
When changing a timing belt, you should also replace the "timing components" which include idler and tensioner pullies. These pullies have as many miles on them as the belt and will not last as long as the new belt if you don't replace them. Failure of these pullies will cause the new timing belt to come off and cause serious engine damage. (ALL Mitsubishi engines are interference engines, meaning that severe engine damage will result from a failed timing belt.)
A transmission fluid and filter change is probably also appropriate at this time - especially if it has not been done in the last 30,000 miles or so.
That could be caused by one or more of three things;
1) Bad Thermostat
2) Water pump problems
3) Yes the cooling fans not running properly and not cooling the water could do it.
I would start with the thermostat because that is the number one cause of this problem, remember you can buy a brand new thermostat and it be bad. Then check to see if the water is being pumped thru the motor by the water pump by removing the thermostat and just let the motor run and look in the radiator for circulation. Then watch when the cooling fan comes on and at what temperature because a faulty sensor could be the cause.