5.9L 12V Performance Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps Related to Performance and Longevity

How do i tune the afc?

Thread Tools
 
Search this Thread
 
  #1  
Old 08-09-2009 | 06:12 PM
bowtech's Avatar
Thread Starter
|
Diesel Bomber
Joined: Mar 2009
Posts: 1,007
Likes: 11
From: Arizona
Default How do i tune the afc?

i hear about it all the time how i do it? like the star wheel and plunger? i would love some pics bc people like me with three number 21 chromosomes (down syndrome) like picture books jk
 
  #2  
Old 08-09-2009 | 09:24 PM
relay93's Avatar
Diesel Enthusiast
Joined: Apr 2009
Posts: 121
Likes: 1
From: Collinsville, Okla.
Default

The way I see it, and it doesn't mean that I am correct, there are three things. 1st is the placement of the AFC housing on the pump the 2nd is star wheel which determines the amount of boost it will take to start moving the arm via the diaghram (sp?) and the 3rd is the smoke screw located on the back of the AFC housing which determines how much fuel from off idle with no boost. The 3rd pre-loads the AFC spring which moves the arm forward for no boost fuel from idle.
 
  #3  
Old 08-09-2009 | 10:06 PM
bowtech's Avatar
Thread Starter
|
Diesel Bomber
Joined: Mar 2009
Posts: 1,007
Likes: 11
From: Arizona
Default

where is the 3rd one? how you know if its good or what to mess with?
 
  #4  
Old 08-09-2009 | 11:22 PM
tower_ofpower's Avatar
Diesel Bomber
Joined: Jul 2009
Posts: 1,861
Likes: 86
From: Kingwood, WV
Default

you should get a pretty good puff when you mash it on a dead stand still (no boost) 2 1/2-3 turns should get ya plenty of smoke and power w/o being excessive, reduce the spring tension on the afc and it'll bring your torque curve up abit being that it hits fuel quicker and not waiting until it has more air than it needs for the ammount of fuel actually being delivered
 
  #5  
Old 08-09-2009 | 11:36 PM
bowtech's Avatar
Thread Starter
|
Diesel Bomber
Joined: Mar 2009
Posts: 1,007
Likes: 11
From: Arizona
Default

2 3 turns on witch one? the smoke screw? where that on the back? where you have your star wheel?
 
  #6  
Old 08-10-2009 | 06:19 AM
relay93's Avatar
Diesel Enthusiast
Joined: Apr 2009
Posts: 121
Likes: 1
From: Collinsville, Okla.
Default

Originally Posted by bowtech
where is the 3rd one? how you know if its good or what to mess with?
Look at figure 4 of this link. http://www.tstproducts.com/pdffiles/INSRUCT98.pdf
The right hand side of the picture you will see a screw then below it a piece that sticks out it is a cover. You will need to remove this cover to adjust the smoke screw. When I installed the TST AFC spring the instructions said to back the screw off then turn the screw back in until it was making contact. This was to help control the off idle fuel from running rich which it controls the black smoke. When I installed the Gov springs I turned the screw in 2.5 turns whiched helped with starting.[URL="http://www.tstproducts.com/pdffiles/INSRUCT98.pdf"]
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
crpmap
Ford Powerstroke 08-10 6.4L
0
08-16-2015 07:38 AM
crpmap
Ford Powerstroke 08-10 6.4L
0
07-29-2015 11:01 PM
NiNjAassasin545
12 Valve 2nd Gen Dodge Cummins 94-98
0
12-02-2014 11:40 PM
xj_crawler
12 Valve 2nd Gen Dodge Cummins 94-98
12
11-20-2014 10:17 PM
SMatyac
12 Valve 2nd Gen Dodge Cummins 94-98
2
11-04-2014 10:29 PM



Quick Reply: How do i tune the afc?



All times are GMT -5. The time now is 05:55 PM.