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The computer is not the problem. Could be a defective coolant temp sensor causing the computer to keep the engine running rich after it has warmed up. Check for OBD1 codes. Could also have an intake manifold air leak or defective EGR valve.
Smokes blue on cold startup = leaking valve seals, which really don't affect drivability if it stops 1-2 seconds after startup. To fix you need new valve seals/heads rebuilt.
If it smokes while under load, then the rings are worn, letting oil seep past the rings into the compustion chamber.
Have you let this car run low on oil? Leaking valve seals usually present themselves if the car has been sitting a while, drying out the seals/cracking them. Worn rings should only present themselves after very very high milage, such as 300,000 miles or more. Somebody has not changed the oil on a regular basis, or just never changed the oil, or only changed the oil like every 20,000 miles.
To bring your engine back to normal, you will have to overhaul the engine and have the heads rebuilt as well.
This is a social web site, like facebook,so no prices
The only way to get a price is to have the motor at an engine shop & apart,for quote or guess at the cost of necessary repairs or a compete already rebuilt engine replacement
I am led to believe that from 2000 the ecm of the mazda cars could be programmed for better performance with the use of a laptop with a special mazda program
try talking to performance shops as they are most likely to have the programs or can advise if it is possible to reprogram
SOUND LIKE YOU NEED A TUNE UP.ENGINE LOW POWER OUT PUT..YOU NEED NEW AIR FILTER, SPARK PLUG + WIRES ALSO CHANGE FUEL FILTER.CHECK INTAKE MANIFOLD FOR LEAKING VACUUM HOSES.
This is catastrophic for the engine and there will be damage beyond the inevitable bent valves. This is the cost of poor preventative maintenance. Rebuilding the engine will be expensive as will installing a replacement unit. Get some quotes but I suggest it's probably not worth it given the market value of the vehicle.
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