Mazda 3 - Cold Start Problem

[obeiron]

As the topic states, I'm getting a problem when starting my 07 Mazda 3. When starting the car on a morning, it stutters for a few seconds before picking up. It only happens when the car is cold. Once or twice it has cut off after starting but restarts and works fine.

The car has 52,000kms and was always serviced at the dealership but they cannot solve the issue.

The following was done but the problem is still there:

Battery Changed
Spark Plugs Changed
Head Gasket Changed
All injectors serviced and one changed

The check engine light does not come on.

Any ideas?

[Groovemaster]

"SS can't solve the problem", what a waste of time. Do you use super or premium?

[obeiron]

Yeah, that was disappointing. Always used premium.

[Groovemaster]

ever serviced the throttle body? I threw in a bottle of redline fuel system cleaner after a fill up and half day later I started and it sputtered and cut off, but when I restarted it worked good......BTW I talking about a 323!

[S_2NR]

had that problem, accompanied by a CEL, bad gas.

[obeiron]

had that problem, accompanied by a CEL, bad gas.

No check engine light so far. What did you do to solve the issue?

Groovemaster, I believe the throttle body was serviced by one of the mechanics. Did not help the issue.

[S_2NR]