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Discussion Starter #1
Hello there, I'm stuck for answers on this one.
I have a 2004 Mazda 6 214,000km on it. One day while slowing down for a stop sign the car just died. It did restart right away but continues to be an issue.
Here's the details. Start the car and drive for 10 min or so until it warms up. Slow down for a stop light car may or may not die. Usually happens with the first stop or two once warmed up. Full of fuel. Took the back seat out and can hear fuel pump kick in and pressure up. If the car dies it usually has to cool off for 15 or so minutes to restart. Sometimes if I get in and drive to the store and shut it off for a few minutes it won't start again for 15 minutes. Does not idle rough, does not throw any codes. It stalled tonight on the way to my buddies to help me find out what is wrong with it. Once it started it ran fine, it restarted right away at his place and continued to idle with no issues. We did a wiggle test on the coil wires but nothing happend. The Rpms just drop right off and the car dies. One thing I will fix tomorrow is the battery ground is a little corroded. Not bad but I'll clean it up anyway.
I am kind of at a loss. Any ideas? Thanks

29 Posts
This bulletin applies to 2003-2009 Mazda6, 2004-2009 Mazda3, 2006-2009 Mazda5, 2006-2009 Mazda MX-5 and 2007-2009 Mazda CX-7. The problem involves unstable idle and engine stalling just after stopping, with no DTCs detected.

The problem is due to carbon deposits inside the throttle body, causing air flow to decrease.


After noting the customer’s radio station presets, disconnect the battery terminals. Remove the air hose from the throttle body. Disconnect the throttle body connector. Remove the throttle body from the intake manifold, with the water hose connected.

Clean the throttle body on the air hose side using a soft, clean shop cloth, sprayed with engine cleaner (Mazda recommends their P/N 000-77-A86). Clean across the cross hatch areas and especially around the circled areas shown in the accompanying illustration.

Turn the throttle body to clean it at the intake manifold side. Clean the throttle with the throttle valve opened using the same shop cloth and cleaner. Be careful not to pinch your fingers in the throttle valve when opened.

Caution: Do not spray the cleaner directly inside the throttle body and do not wipe around the throttle valve shaft (as shown by the “Xs” in the illustration.

Make sure that there is no foreign material inside the throttle body. Re-install the throttle body using a new throttle-body-to-intake-manifold gasket.

Connect the battery cables.

Perform the throttle valve position learning and idling engine rpm inspection:

a. Connect the M-MDS.

b. Turn the ignition ON without starting the engine, for one minute, then turn the ignition OFF.

c. After waiting one minute, start the engine.

d. Warm the engine at idle until the cooling fan starts operating or until the coolant temperature reaches 194 degrees F or higher.

e. Turn off any electrical load, including the A/C, with the shifter in neutral or park.

f. Let the engine run for five minutes.

g. Measure the engine rpm at idle using the M-MDS to confirm it is within specification according to the workshop manual.

h. Verify the repair.

i .Enter the customer’s previous radio station presets.

j. If the vehicle is equipped with memory seats, inform the customer that the seat memory positions will need to be set again.


P/N L321-13-655C

2004-2005 Mazda3 (2.0 and 2.3L), 2006-2007 Mazda5 and 2003-2005 mazda6 (2.3L)

P/N L3G2-13-655

2006-2009 Mazda3 (2.0 and 2.3L), 2008-2009 Mazda5 and 2006-2008 mazda6 (2.3L)

P/N L3K9-13-655

All vehicles with 2.3L turbo (L3 with TC)

P/N LFE2-13-655

2009 Mazda6 (2.5L) and 2006-2009 MX-5

Clean the cross-hatch surfaces inside the throttle bore and do not spray cleaner directly inside the throttle body.
<p>Clean the cross-hatch surfaces inside the throttle bore and do not spray cleaner directly inside the throttle body.</p>
With the throttle valve open, clean the areas indicated by the circles.
<p>With the throttle valve open, clean the areas indicated by the circles.</p>

Tags: Mazda

2 Posts
Discussion Starter #4
I took it to a shop as I was getting nowhere. They said the crank sensor was going and that caused the issue. I did have that code come up once with a scanner but I cleared it and tried to get it to repeat but it never did so I thought it was just an error. Here's hoping they got it right.
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