Question about Mazda Cars & Trucks
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Posted on Jan 02, 2017
You're getting a condition known as "vapor lock" or hydrostatic lock. This happens when you run your fule lines too close to a heat source (exhaust, engine, etc). You can solve it by re-routing it away from those heat sopurces...this should help.
Posted on Aug 07, 2009
The check engine light should be on with the engine running. The coolant temperture senser may be open at some temps the fastest way to test this is to change the senser ( it's cheap and a high failure rate part all auto parts stores will haveplenty of this high failure part in stock and they fail many ways. If the car ever overheated it's damaged or truly bad. A very good one will optimize fuel mileage so if it's suspect change it anyway as money well spent a working but wrong senser can cost alot of gas on any fuel injection car or truck, You get what you pay for in temp sensers and the brand name ones are better. All of them are suspect to be bad even when new and ohm test at temperture charts are is repair manuels. Crank sensers and cam sensers also get hot and quit they cost more are harder to change and fail more on the 3.8 motor than the 3.1 or the 3.4. Igiton modules do this too but it sounds like its been doing this awhile and modules and crank sensers don't stay half bad very long. they stop altogrther. Temp sensers can stay bad and work wrong. If you can get a scanner hooks to the car on data stream the senser may show room temp when cold but as it heats up goes up then to -34 thats open the system doesn't know that to do as the air charge temp senser doesn't agree and the system fails to start and will check as flooded. Flooring the gas and hoding it there may start it anyway. The trottle position senser were to show open thats the clear flood mode and the injectors won't fire. Tps voltage should show .5 volt les than 1 volt at idel (it'll start) and 5 volts at full throttle or nearly. if it shows with a scanner of a voltmeter on the center wire 5 volts or 0 it won't start. Coolant senser fails more often and is cheaper
Posted on Aug 11, 2009
SOURCE: Cold Starting
You have a cold start injector that is controled by coolant temp and more than likely the sensor, which is located center of intake, between #2 and 3 injector...it looks a bit like a reg. temp. sensor and will have either blue or black electrical harness connected to it. This sensor 'tells' the cold start sensor, a fifth injector for cold starting, when coolant is below a certain temp and gives extra gas. Try to find one at a junkyard, otherwise, www.getcoolparts.com about $80 new. Better yet, buy a Bentley manual and there's diagnostics using a multimeter on diagnosing specifically. I have an 88 but it is an N/A, not a turbo and is an 8v...if your's is a 16 valve, look for sensor in same spot but under fuel rail/injector area.
Posted on Feb 12, 2010
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