I got 2011 Sienna V6 & noticed little hesitant to accelerate from complete stop or even in highway feel like kind of slow to pickup . it has 106000 Miles & i keep changing full synthetic oil every 5k , changed transmission oil at 60k . changed spark plugs at 100k . not sure if this a fuel related issue ? is there any cheap scan tool that I could use to check fuel pressure Or do you think this is a beginning of a something serious issue.
Thanks
Nuwan
It certainly would be a good idea to scan for codes and live data to get an idea of what's going on. I don't know if that vehicle has a sensor to report fuel pressure. Many do not and you have to check fuel pressure using a mechanical gauge. Check the post "Which Scan Tool Should I Get" near the top of the page for suggestions on scan tools at various budget levels.
Common problems that would affect engine power include things like fuel filter, air filter, weak fuel pump, vacuum leaks, clogged fuel injectors. Cleaning your throttle body and MAF sensor may make an improvement.
https://www.youtube.com/watch?v=NWCKvU2FmDc
