2008 Outback 165,000 mi.

[smartin1019]

My Outback has always started up very nice, 2-3 cranks vroom. Over the last week it has changed a little it still starts 2-3 cranks but it stutters for 1 or 2 seconds like it's not sure it wants to go then vroom. Could the plugs be causing this type of issue? probably 35,000 Mi. on them. If not then what? I have filled with premium grade gas no difference. Any suggestions welcome. Thanks

 

[Ecmbuster]

Restricted exhaust?
Defective MAF?
Restricted air box?
Low fuel pressure?
Sticking EGR?
Vacuum leak?
Defective PCV valve?
Defective / worn spark plugs?
And the timing belt was done when?
And the recorded fault codes are?

 

[smartin1019]

Thank you for that list. The one thing I will say except for the starting issue the car runs as usual.
Timing belt done 103,000 mi.
I don't have a check engine light should I still check for codes
I'm going to clean the Throttle body and the MAF and new air filter
I ordered new plugs will replace them
I don't think any exhaust restriction
How to check the EGR and PVC or just replace?
Is there a way to check fuel pressure?

Thanks for your help

 

[Ecmbuster]

Low engine vacuum may indicate a stuck open EGR.
PCV, just replace it.

 

[smartin1019]

Thanks for those links.
The car runs great except for that slight starting issue. If there was low fuel pressure or exhaust problems wouldn't I see some symptoms while driving the car? Thanks