Question about 2003 Mazda Mazda6
2003 Mazda 6, 4 cyl has erratic idle. Idle will jump between 500 to 1000 rpms. Runs fine when pressing on accelerator. What might cause this?
M.a.P. sensor, air leak in intake system, low or erratic fuel delivery
Posted on Mar 14, 2016
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Posted on Jan 02, 2017
SOURCE: wants to stall at idle.
Here is the most common cause of this stall, it is the idle speed control air-bypass valve and throttle valve, they get full of gunk over the miles and cause idle issues (stalls) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.
Posted on Nov 10, 2008
one thing to check is rear engine mounting i have had a stone wedged in one and it causes a nasty noise when accelerating
Posted on Apr 17, 2009
change the idle air control motor and check to see if the ports are clogged, this too will cause surging idle. the idle air control motor is located on or near the throttle body
Posted on Aug 04, 2009
The butterfly at the air intake may be dirty. If at all possible remove the breathers leading to this and clean the butterly with carbuerator cleaner or something like it. There may be deposits and it is not breathing good.
Posted on Oct 09, 2009
First run a tank of a strong fuel system cleaner like BG-44K. If that doesn't help, clean the throttle body. If that doesn't help, take it to a mechanic.
Posted on Nov 03, 2009
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