question on dsp5 tuning

[lotsofmiles]

Short run down explaining my question:

Before installing the dsp5 I had a 'low boost at highway cruising speed' tune
I had the boost set below 1 at 70mph. I could load that tune and run the Banks 6 gun at any level. At 70 mph my boost would be below 1psi

So now on my 'low boost at 70' tune on the dsp5 the boost is NOT changing. I can feel the tune when I switch to it from other changes. But the boost isn't where I'm putting it.

Here's the basics:
Tune 1 - my basically stock, only lowered idle and open vanes at idle.
Works fine

Tune 2- stock vane position at idle - works fine when engine is cold. Vanes open when engine is warm. I'm assuming that's normal tho?

Tune 3 - turbo brake - works fine

Tune 4 - no changes from 1 yet. Any ideas?

Tune 5 - low boost at about 60-70 mph, minor changes to pedal vs tq, and fuel.

I see that each dsp tune only changes the egr off boost and vanes, could the finger stick be interferring with the boost being where I want it? Taking the stick off has been on my to do list....
Or should I change it around and put the low boost tune on 1?

Anything else I should look at?

Thanks!!

 

[stacks04]

If the vain tables are not changed in the main tune the dsp wont work. I know we have a vain table to adjust in the dsp now, but its only 1 table which is the target position table. If your main min/max tables are not changed in the non dsp tune the dsp will revert to whatever it needs to make the desired boost. Try changing the non dsp tune and see if that helps. In my mileage tune I have the desired boost set to 13psi which is lower than atmosphere and I have the target table set to 1* in the area where I want no boost. I also have my main vain tables set to work that way also. I get 0 psi boost when cruising on the highway when using that tune.

I run the biggest least restrictive tune as num 1 just for this reason. It allows everything else to work as you work through the dsp stuff.

 

[lotsofmiles]

Thanks. I'll double check that. Got to be something little I'm missing or didn't change.


Edit. Vane min in base tune is 2.5 from 300 rpm all the way up. I don't recall changing that.

I swapped the tunes around and I'll try running the #5 as the base tune. See what happens

 

[lotsofmiles]

Swapped tunes. Put the low boost in the base tune and now its running 0 boost at 70 mph in every position on the dsp5, even tho the other tunes call for more boost.

The voltage on the dsp5 positions is correct

Back to that other ? Is the finger stick interfering? I think its coming off today and all turn off the codes with efi and try again

 

[lotsofmiles]

Cold engine each tune works fine

Warm its seems to be running base tune boost table.

Am I getting close?

 

[Atouchofgrass]

I would have to say the finger stick is your problem, when i first put it in, it would send my truck basically into limp mode and run slower than stock and when i took it out it ran beautiful, i had the wires and everything correct. Try there first and go from there, since you have efi live, it'll clear it anyways. :thumb:

 

[lotsofmiles]

Thanks, but nope. Stick was removed and its still doing the same thing. Works fine cold engine. Warm engine its using boost/vane tables from base tune. Can feel other changes in the tune but boost+vanes are off the base tune

 

[LarryJewell]

your strong tune should be the base tune

 

[lotsofmiles]

Which is the 'strong' tune. They're all really just boost vane changes for personal preferance.

I like the turbo brake while towing but not empty...

Was trying to maximize mpgs on eway but didn't like hitting the low boost spot in every gear. Thought I could have my cake and eat it with the switch, maybe not.

What I've done since last post was recommended, change b1503+ 1504 so egr on is never met. Did that and its still doing the same thing. Cold engine all positions work, warm it goes back to base tune boost/vane tables. Trying to narrow down the temp it does it. Right now I know its between 110 and 150

When I get bored I'll disconnect the 6 gun to see if its interferring. But each of the tunes (turbo brake and low eway boost) I've uploaded to ecm and they worked fine before the dsp5 went on.

Right now I got a brake issue I'm working on taking priority.

Thanks for the replys!

 

[Dozerboy]

You can log what DSP setting the truck is running in. Did you mess with the ECT vane tables specifically the multiplier tables in your base tune? They are giving me problems if there not left stock. And if you didn't realize ECT does have an affect one the vanes/boost.

 

[lotsofmiles]

I left the ect tables alone.

Pretty much I just made boost + vane changes to each tune, except some very minor fueling changes to the mpg tune.

I can feel the fueling changes when I switch to that tune, espically since the changes were only in the highway cruising range. 1700-1800 rpms.

Each of the tunes I had loaded individually on the ecm before and they worked fine

If I get bored I'll totally disconnect the 6 gun to see if the tunes work without it. But at this point I think its something stupid in the tune.
I have narrowed it down to somewhere between 110 and 150 degrees that it switches over to the base tune boost/vane tables. Next time I drive the truck I'll try to narrow it down somemore

 

[lotsofmiles]

Switches to base ytune at 138 degrees

 

[lotsofmiles]

It started working.
Haven't changed the tine or anything. Just stated working the way it should

Idk. Crazy.