Mazda Repair Questions? Ask Mechanics for Answers ASAP
Is the check engine light ON when the engine is running .
Okay thank you .
Most common for this issue is the coolant temp sensor ,
I would just buy a new OE sensor and fit and try before paying for a complete diagnostic scan at the dealer .
this is not an expensive part so worth doing the original is 2001 ?? so nothing lost if this is not the problem .
Still having issue then please get back to me .
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Kind regards Greg.
Intermittent could be because of the temp ? not being the same every time .
Buy the sensor at the dealers you will be sure to get the right one .
You really never know where the online come from could be copy's .
Okay good the temp sensor was the typical issue.
Here are other possibility's that must be checked .
Fuel pressure first thing in the morning must be checked ,your fuel may be returning back to the tank so fuel pressure gauge check with ignition ON at first morning start. should go up to around 40psi .(possible fuel regulator malfunction)
Malfunctioning crankshaft sensor (will not set a code)
Bad PCV valve
Restricted exhaust system.
Do these checks then get back to me .