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Posted

Good afternoon everyone,

 

I did some searching on the site before posting, but would like some other insight.  My truck bucks between 40 and 50 mph and rpms are around 1100-1200 on level 2 and 3; I have not gone above level 3 as pump is not tapped.  I feel it may be timing related as it did not buck today when I had the Quad on level 0.  Current tune set up is below. Do you guys have any suggestions where to move timing to stop the bucking? 

 

Tune:  Mopar1973man Economy Tune

Max Load Timing Offset: 1 degree

Low PSI Timing Reduct: 3 degrees

Timing Reduct Scale: 40%

Light Throttle Timing Adv: 1 degree

Light Throttle Load Limit: 25%

 

RPM Timing Max
1500rpm: 14

2000rpm: 16.5

2500rpm: 19

3000rpm: 21.5

Max: 24

 

I attempted to data log today, but closed app before I could import data.  I will get data tonight when I leave work.

 

Thanks,

 

Tim

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  • Go wot from take off.  Mikes tune is made for 7 x.010's you are running a good bit less fuel than that.  I am guessing your offidle fueling is causing your issues.   Too little fuel will cau

  • So how it works sub 1200 rpm     if(RPMS > idle_limit && TPS > 2)// && RPM > 850) { idle_limit = 600; // RPM low limit fuel_trigger = 1

  • Mine definitely was because of this  it is now a slightly noticeable shutter.  Just hate that trans started to act up.  Always something   Tim

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violent bucking is typically too little fuel for the load

  • Author
3 hours ago, Me78569 said:

violent bucking is typically too little fuel for the load

Mine definitely was because of this  it is now a slightly noticeable shutter.  Just hate that trans started to act up.  Always something

 

Tim

Edited by Collinst15

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