I'll try to make this short,..but no way. Ck out my sig for mods. And yes I've read numerous other threads on this and many suggestions but NO one has a fix from what I've seen.

With TST stacked with CLDL the stack pops (backfire-like) just as the truck goes from 3rd into od (max rpm). Here's what I've tried so far. My TST Twins was ck'd by TSt in Sept and they found zero prob. I've changed out both harnesses in the past month,..NO fix. I've changed settings on TST as low as 3/2 and still have the problem. I've put the CLDL on tow and still the problem. If I take either the TST or the CLDL off the truck then NO pop. I sent the CLDL in for a new download with the latest program and still have the pop. If I run the TST by itself,... I've ran it up to 8/8 and NO pop. If I run the TST up to 7/7 and EZ on lvl 2 then NO pop. There are tons of guys running the BDDL/CLDL on at least performance lvl with the TST and not having this problem evidently, so what's my problem? I like the CLDL even if it's on tow as it seems sotp to be better low end than with the EZ. Here's a kicker,...I ran the TST on 5/5 and the CLDL on performance with the STOCK turbo, prior to my twins and didn't have this but now that I have the twins I get this pop. I have the 04.5 with the electronic wastegate so with the twins this is disconnected and most guys say just tie it back and so that's what I've done but I'm wondering if it's not boost fooling with this unplugged? And is this causing the problem. Some say your CP3 is running out of fuel at max wot runs and at high rpm (3rd to od shift) then that's why the pop,.... only wouldn't that be the case when the stock turbo was on the truck and it didn't pop then?? If you know of a real tangible fix to this then I'd like to hear it. I appreciate the help. Tks.

 

Sounds to me like the turbo is barking. It's a common problem w/ aftermarket turbos to do this as the truck goes into OD. MY HTB2 does it sometimes when going into OD getting on the highway. It doesn't do it all the time though...
I too never had a problem with the stock turbo!!!!

Do a search on turbo bark.....

 

It is definitely NOT turbo bark. I know turbo bark and this isn't it. Sometimes when it's winding hard just before the 3rd to od shift it gives a much lighter sounding popcorn popping-like sound and then a single hard pop just at shift. I am not letting off too quickly which causes the turbo bark, which is a totally different sound,...I am wot up to and through the 3rd to od shift when this happens and it's a loud backfire-like sound. Tks.

 

I understand what you are saying but turbo bark does not only happen when you let off the throttle too fast. For some reason when the truck shifts into OD, even under hard throttle, the turbo will sometimes bark. If mine does it, it usually barks twice. It doesn't sound like popcorn though. It sounds more like I just ran over a dog, and then his dog friend.....
If it's not the turbo then I have no idea what it could be. I've never heard of a diesel backfiring.........

 

PM Don M...he knows.

 

Well if it is boost fooling issues or cable issues with the ECM because of the soleniod cable unplugged, I think you can get the bypass plug that Industrial Injection has. Just keeps the ECM happy with the circuit. This is what is on mine with the SPS66.

I did not have the issue on mine when I was running the Triple Dog/TST/EZ stack, and at the track I ran BDDL performance program, TST 7/7 and EZ Level 3. I have decided to not use the BD Triple Dog downloader any longer. Just my personal preference.

 

OUT-OF-HERE, I know what sound you are talking about. With my TST stacked with my bullydog downloader combo setup is tst 4/4 and bddl on 90hp setting or tow setting I get this popping noise while in 3rd at high rpm and in overdrive at high rpm 2700 and above. Sounds like someone has taken a deck of cards and is under the hood flaping them or popping them together. It is not turbo bark . woof woof woof. No it is not turbo bark and it is not turbo surge. I was told that the rail pressure was dropping way low and I was running out of fuel and that is what causes this sound.

Im still not sure but hopefully the cp3 stage 2 or stage 1 injection pump will cure my popping because the tst and bullydog setup is by far the best stack I have tried to date . Smooth power from idle till redline.

Any ideas ? Any suggestions?

I am currently installing a manual pressure gauge for the pusher pump. I would like to install a rail pressure gauge too. Hoping this will help monitor why I POP !!!

Good luck Out-of-here on the popping noise, for now , I have decided to not hold my truck at wot .

 

no doubt its a rail pressure issue. usually popping means your draning the rail. try running the tst with the tourque setting off. i had the same problem.

 

I really can't help with any of your problems, but if you want to hook up one afternoon for a beer or two, then take me for a ride in this thing... I really want to see what a good tranny will shift like and the added power will just be icing on the cake.

Maybe grad TommeyGun and meet some where in Chesterfield valley...

 

Mine cuts out at high RPM like someone shuts the engine off for a split second then turns it back on.

Is this what you are getting at?

 

Nope. It is a severe hickup however, but it will pull strong all the way out once it pops at the 3rd to od shift.

 

My guess is that it is too much timing. You have two products that are doing timing; BDDL and the TST. I have heard the same rattle just as you describe. It tends to happen when cold at light throttle, or heavier throttle when the motor unloads briefly (shift).

This is advanced timing and higher cylinder pressures. I will be upgrading the TST box and remote next week to the new version that features adjustable timing so that I have better control.

Chris

 

Chris,

I have heard the timing rattle you elude to and this is not it. The guys who have it know. It's a light popping sound under wot and then when it has that final high rpm shift into od that's when you get the one loud pop (backfire-like) This is not timing. Also for what it's worth the timing/injector rattle thingy has almost totally disappeared with the addition of the twins and the 5" exhaust. If the truck is totally warm b-4 flogging it, which I have made a practice of, then you can't hear any rattle at all, fyi.

 

cbutler610 I just got the latest TST box .I see nothing about timing control.Just hp-tq turbo kooldown timer.I would like to know more THANKS

 

I don't see how it could be in your case but that popping is very common when guys run the rail dry... Is there ANY way it could be starved even with the fass?