IS - 3rd Gen (2014-present) Discussion about the 2014+ model IS models

2014 IS 350 Direct Injection Engine?

Thread Tools
 
Search this Thread
 
Old 10-01-15, 05:55 AM
  #1  
dbs600
Lexus Test Driver
Thread Starter
 
dbs600's Avatar
 
Join Date: Oct 2007
Location: NY
Posts: 1,148
Likes: 0
Received 1 Like on 1 Post
Default 2014 IS 350 Direct Injection Engine?

Does the 2014 IS 350 AWD F Sport have a Direct Injection engine?

Will engine performance diminish in time due to carbon build-up?

If so, any way to prevent same?

Thanks!
Old 10-01-15, 05:59 AM
  #2  
Snowrydr01
Driver
 
Snowrydr01's Avatar
 
Join Date: Apr 2015
Location: PA
Posts: 165
Likes: 0
Received 1 Like on 1 Post
Default

It is a dual injected engine. The primary injectors are direct but it also has secondary port injectors. Those secondary injectors keep the carbon from building up on the back of valves.

this one one of if not the main reason why i chose this car over a 335 of 535. Im getting lazy and only want to change fluids and brakes for the next ten years in my driveway.

Originally Posted by dbs600
Does the 2014 IS 350 AWD F Sport have a Direct Injection engine?

Will engine performance diminish in time due to carbon build-up?

If so, any way to prevent same?

Thanks!
Old 10-01-15, 06:04 AM
  #3  
redspencer
OG Member
iTrader: (1)
 
redspencer's Avatar
 
Join Date: Apr 2006
Location: Central FL
Posts: 1,851
Received 529 Likes on 314 Posts
Default

If you're interested, attached is some technical information regarding the D4-S dual injection system.
Attached Files
File Type: pdf
D4-S info.pdf (786.3 KB, 765 views)
Old 10-01-15, 06:37 AM
  #4  
theoryguy
Pole Position
 
theoryguy's Avatar
 
Join Date: Nov 2013
Location: NY
Posts: 259
Likes: 0
Received 1 Like on 1 Post
Default

Originally Posted by dbs600
Does the 2014 IS 350 AWD F Sport have a Direct Injection engine?

Will engine performance diminish in time due to carbon build-up?

If so, any way to prevent same?

Thanks!
It's a direct and port injection engine - it has 12 injectors so you don't have to worry about carbon buildup

The video below explain it (start at 10:53):

Old 10-01-15, 10:59 AM
  #5  
alvitdk
Driver School Candidate
 
alvitdk's Avatar
 
Join Date: Aug 2015
Location: Texas
Posts: 34
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by theoryguy
It's a direct and port injection engine - it has 12 injectors so you don't have to worry about carbon buildup

The video below explain it (start at 10:53):

https://www.youtube.com/watch?v=PuC64BDdQUE
Nice review, but the mechanic is a big jerk and somewhat ignorant, would never bring my car to him for service.
Old 10-01-15, 11:16 AM
  #6  
dashmer
Rookie
 
dashmer's Avatar
 
Join Date: Dec 2013
Location: Nova Scotia
Posts: 86
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by alvitdk
Nice review, but the mechanic is a big jerk and somewhat ignorant, would never bring my car to him for service.
He totally rubbed me the wrong way as well...
Old 10-01-15, 02:37 PM
  #7  
Larry96815
Lead Lap
 
Larry96815's Avatar
 
Join Date: Aug 2005
Location: Hawaii
Posts: 560
Likes: 0
Received 1 Like on 1 Post
Default

Originally Posted by alvitdk
Nice review, but the mechanic is a big jerk and somewhat ignorant, would never bring my car to him for service.
Same thoughts here. The good thing is people like him make me want to buy the car (again) just for spite.
Old 10-01-15, 03:50 PM
  #8  
dbs600
Lexus Test Driver
Thread Starter
 
dbs600's Avatar
 
Join Date: Oct 2007
Location: NY
Posts: 1,148
Likes: 0
Received 1 Like on 1 Post
Default

Wow; if this design prevents carbon buildup, why doesn't BMW use same?

Is there some downside?
Old 10-01-15, 07:42 PM
  #9  
theoryguy
Pole Position
 
theoryguy's Avatar
 
Join Date: Nov 2013
Location: NY
Posts: 259
Likes: 0
Received 1 Like on 1 Post
Default

Originally Posted by dbs600
Wow; if this design prevents carbon buildup, why doesn't BMW use same?

Is there some downside?
BMW doesn't as they are only direct injection. An engine can still develop carbon buildup with direct injection. You need both port and direct injection to resolve the carbon buildup issue.

Last edited by theoryguy; 10-04-15 at 11:11 AM.
Old 10-03-15, 07:24 AM
  #10  
Jeremy1976
Driver
 
Jeremy1976's Avatar
 
Join Date: Jan 2009
Location: Wisconsin
Posts: 133
Likes: 0
Received 4 Likes on 4 Posts
Default

The port injection was a big selling point for me as well. I have a VW yet that needs a $800 service every 60,000 or so to clean the intake valves....
The following users liked this post:
michaelz (12-04-21)
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Tharr62
IS - 3rd Gen (2014-present)
18
05-17-19 01:31 PM
dbs600
GS - 4th Gen (2013-2020)
15
03-27-15 10:47 PM
Tantrix
GS - 3rd Gen (2006-2011)
5
01-01-15 06:32 PM
g_abac
IS - 2nd Gen (2006-2013)
8
03-05-13 07:48 PM
Delic
Performance
4
03-21-11 02:01 PM



Quick Reply: 2014 IS 350 Direct Injection Engine?



All times are GMT -7. The time now is 07:03 PM.