so i had a very long ordeal tryin to get my SCIV in stalled correctly. my truck sat up in shops for about 5 months. now all that is said and done and is working perfectly but, my truck seems to have lost power. im gettin more black smoke and a lot of hesitation off the line. no codes or anything. you think my lift pump is working optimal? my air filter is a little dirty so im gonna clean it/replace it if i can find a k/n replacement for it. should i also change air dog filters? i had an lly with a stealth II only, get about three truck lengths off me from the line. took me bout 1/8 mile to catch up. unacceptable

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how do your balance rates look?

does the filterminder indicate a filter change/clean? and how much pressure are you getting from the airdog and is your FP tap before or after the stock FF. i doubt there is a problem with the tuning rob is a good tuner

2500HeavyDuty's Sig:

i dont know how to check any of that you just described. how do you check airdog pressure? and balance rates? if by filterminder your referring to the green and red plastic object by the filter, i dont think its ever worked. FP? sorry, dont know too much. can you go further into detail . thanks

You can check the pressure you are getting by the airdog with a fuel pressure gauge. I put my sensor for the fuel pressure in between the factory fuel filter and cp3 pump so that i can tell if my fuel filter is staring to get dirty.

your airdog should come with a low fuel pressure indicator light if im not mistaken, and thta should tell you when the filters in the airdog are getting dirty. how many miles do you have on the filters right now?

The balance rates is a test done by using a scanner to read how balanced each injector is at idle. The test can tell you if you have a bad or slow injector based on the readings. its very simple to do and its usually accurate. There is another test to check the injectors thats called a return test, but that involves pulling the valve covers off and special hoses and graduated cylinders.

Yes the filterminder is the red and green plastic cylinder with the yellow button on top of it. baisicly it work off of suction, when the filter gets dirtier it makes it harder for the air to pass though the filter creating more of a vaccume on the inside of the intake. when the filter gets really dirty the vaccume caused by the turbo actually sucks in the filterminder and tells you to change the filter. you can easy check the filterminder by pulling it out and putting a vaccume on it. it only takes about the same effort as it does to drink a milkshake though a straw.

FP stands for Fuel Pressure

thanks a lot man. the airdog came with an optional low pressure light which i of course declined for some reason. im just gonna go ahead order that along with the two filters. im going to go check the filterminder now. i dont have a fp gauge and cant afford one right now so hopefully the new filters will help. also, for the balance rates, how do you check it. i dont think efi can do it so do i need a tech II?

efi live can do it, when scanning upload this PID selection and log the data when the truck is in park and when the truck is up to temp. you can also do it when the truck is in gear holding down the brake


Whats your email so i can send you the pid selection, i cant attach it to a thread here

thanks for the help man. balance rates look good. just ordered new airdog filter with the low pressure switch. hope that helps

you can also tune the truck back to stock and see if it still does it.

what were the balance rates?

#7 was the only one that was a little off. it got to +-3.xx. all others were in +-1.xx

What converter are you using?

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the balance rates look aright, the mos recent set of injectors i had were rebuild ones and one injectors was a +3 and the rest were under one, i had a rough idle and the injector clatter under acceleration made it sound like a 7.3. even with the lift pump you are still getting positive pressure which is far better than stock. i doubt a filter change will do much but we will see


its in his sig, a 1054

Thanks, didnt see it!
I wouldnt run a K&N , I would look at the other brands available.
What about a boost leak ? I also had one that had the same symptoms, but the wastegate tap was missing ....It wouldnt really move under its own power though.

hmm, boost leak

The first place i would check for one of those is where the driver side ic tube passes over the steel powersteering hoses right above the steering gear box. they like to rub against eachother

just changed airdog filter and installed low pressure switch. didnt seem to help any. that was my next question, maybe the TC has something to do with it. but then again i could have a possible boost leak. it seems to take longer to spool. i have done the intake horn mod so im leanin towards a boost leak. i have two tees and the ppe boost valve installed on that one line. i have hose clamps on all but one connection so ill be checking that tomorrow. hopefully thats it. what other places should i check for a leak?

is your filter element oiled?