Go Back   DodgeForum.com > Dodge Trucks > Dodge Dakota > 2nd Gen Dakota
Sign in using an external account
Register Forgot Password?


2nd Gen Dakota 1997 - 2004 Dakota's

5.9 magnum fuel sync??

Reply
 
 
 
 
Thread Tools Search this Thread
  #1  
Old 03-18-2014, 02:03 PM
44dakota's Avatar
44dakota 44dakota is offline
Professional
 
Join Date: Feb 2014
Vehicle: 2001 dakota 4wd quadcab5.9
Location: new knoxville,ohio
Posts: 137
Default 5.9 magnum fuel sync??

hi guys,ive just completed some work on my magnum engine.it started with a worn lobe on my camshaft,so i ended up replacing the cam bearings,put a new crane 2020 camshaft with new lifters and a comp cams double roller timing chain..
everything actually went well on this swap,i marked the distributer when i pulled it out so i could get it back in exactly the same,the engine fired up and idled smooth and sounded very nice,but,i noticed if i give it a hard snap from idle only! it would give me a quick backfire out the throttle body,but,if i do it anywere else in the rpm range it would be fine..
so with all the talk about needing a 4000$ scan tool to set fuel sync.i lossend the distributer and started the engine,i gave it a quick throttle snap and got a short and quick pop,so i turned it just very slightly clockwise(maybe 1/8 to 1/4 inch in movement)which would be simular to retarding the timing and bingo!! no backfire!!!
so my question for you guys,would you call this good enough or should i still bring it to a dealer to get it set???i really dont want to do that though.lol..
i havent actually driven it down the road yet,i guess that will be the real test...
This ad is not displayed to registered and logged-in members.
Register your free account today and become a member on Dodge Forums!
__________________
360magnum
crane 2020 cam,K&N air filter,shorty headers,double roller,4.56 gears..
Reply With Quote
  #2  
Old 03-18-2014, 10:33 PM
magnethead magnethead is offline
Champion
 
Join Date: Feb 2005
Vehicle: 01 Dako 3.9 4x2
Location: Fort Worth, TX
Posts: 4,757
Send a message via AIM to magnethead
Default

the sync, in as laymens as I can reasonably get it (because even I don't fully understand it), is accepted by the computer as long as it is within 6 degrees of nominal. As i recall, going to -3 degrees yields fuel mileage and +3 degrees yields more power.....supposedly. By turning the distributor, not only are you changing the rotor phase and timing, you are also adjusting when the injectors fire relative to the intake valve's position. Again, that's all I know...it's way over my head.
__________________

68 Camaro (sold): 5.318@128 / 8.568@155 ; 2014 Dragster: 4.79@143, 2014 2X Champions!
Magnethead494.com Web & Computer Maintenance
McDermott Family Racing
Reply With Quote
  #3  
Old 03-18-2014, 11:12 PM
00DakDan's Avatar
00DakDan 00DakDan is offline
Section Moderator
Dodge Forum Moderator
 
Join Date: Dec 2010
Vehicle: 2000 Dak Sport CC 4.7 5 speed 4x4
Location: MA
Posts: 3,137
Default

It's just my opinion but with the time and money you've invested, get the fuel sync checked. It shouldn't be that expensive if you can find a shop to do it. It's quick to check. Snap-On makes scanners that will do it that a good shop should have.

If you do decide to just tweak it yourself, make very small changes at a time.
__________________
http://dodgeforum.com/forum/signaturepics/sigpic158370_10.gif
Reply With Quote
  #4  
Old 03-19-2014, 12:49 AM
44dakota's Avatar
44dakota 44dakota is offline
Professional
 
Join Date: Feb 2014
Vehicle: 2001 dakota 4wd quadcab5.9
Location: new knoxville,ohio
Posts: 137
Default

thanks guys,yea this fuel sync thing is just weird to me,im definatly old school..once i get to drive it down the road ill determine if i want to take it and get it checked,right now my y pipe is rubbing my front driveshaft(better fix that!) after putting a set of shorty headers on it,it must have changed the position of the pipe,im really starting to get used to working on this truck..lol..
__________________
360magnum
crane 2020 cam,K&N air filter,shorty headers,double roller,4.56 gears..
Reply With Quote
  #5  
Old 03-19-2014, 09:50 AM
00DakDan's Avatar
00DakDan 00DakDan is offline
Section Moderator
Dodge Forum Moderator
 
Join Date: Dec 2010
Vehicle: 2000 Dak Sport CC 4.7 5 speed 4x4
Location: MA
Posts: 3,137
Default

It's really as important as setting the spark timing. When it's right you'll get the best power and mileage.
__________________
http://dodgeforum.com/forum/signaturepics/sigpic158370_10.gif
Reply With Quote
Old 03-19-2014, 09:50 AM
 
 
 
Reply




Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Join DodgeForum
Advertising

Featured Sponsors
Vendor Directory
Our Sponsors
All times are GMT -4. The time now is 09:39 AM.

Internet Brands, Inc.


Contact Details & Emails