Ford Focus Forum, Ford Focus ST Forum - View Single Post - Have you ever noticed this when you are low on fuel??
View Single Post
Old 01-12-2013, 06:13 PM   #17
suss6052
Focus Addict
 
suss6052's Avatar
 
Join Date: Feb 2012
Fan#: 95752
Location: ..., MI
What I Drive: 2013 Ford Focus ST2 Ingot Silver

Posts: 12,391
FF Reputation: 23 suss6052 Great Standing Member
Buy-Sell-Trade Rating: (3)
Quote:
Originally Posted by dpando1 View Post
I have a little over 10,000 city miles on this car. because it's direct injection I am sure that it could use this ATLEAST for cleaning the intake valves and injectors...But yeah any extra information would help.. I am on there site right now...I definitely want to get to the bottom of this

thanks for everything btw
Anything you put in the gas tank won't ever clean the intake valves unless you have fuel and air leaking out of the cylinder back into the manifold with these cars.

Direct fuel injection means there is no air/fuel mixture inside the intake manifold, only air and a bit of exhaust gasses that are recirculated pass through the intake into the cylinder. Fuel is injected directly into the cylinder itself at high pressure.

This was one of the key enablers for the 12:1 compression ratio to run on 87 octane fuel without the increased risk of pre-ignition or spark knock in a SI (spark ignition) engine.
__________________
Moderator for: DURATEC Ti-VCT Performance, ST Performance, MK3 Focus
suss6052 is online now  
    Reply With Quote