Finally dyno'd for the stock 5.3 + turbo:(

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Originally Posted by r.barn

Stock base line pull of only 170rwhp say something was wrong from the
get go to me.

Just dyno'd my bone stock 70k 4.8L Tahoe at 205rwhp baseline

I'd put a compression tester on it too.

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Naw different years even make a difference and the mileage is more then doubled. I pulled all the plug last night and all look ok, wrong freaking ones but ok.
We dyno'd that stock truck as if straight from the customer I bought it from.
Today I am going to get new wires plugs, etc, check the fuel pressure to make sure is up and something really stupid like that.

The way its acting its either fuel, or timing, or tune. Maybe its in limp mode or something stupid not sure. But I will find out.
Last night the truck really did not want to run or zing up at all even free wheeling.

There is a glitch somewhere and now I have to find it before moving onto the other swap.:(

I was hoping to start turning the boost up, but not now.

Hey Quick, yea I know it need springs, but this is something different now. Banging in the exhuast is telling me something in the ignition. I have coils off a 6.0 here might throw those on If I can get the truck to even run down the road with NO boost.
Time will tell

A bad MAP sensor or wiring to the MAP would cause those issues, too.

Check the reading of the MAP sensor at key on and running and see if they fall into range.

hmm, range being what. I am no tuner for we all know that. But I am willing to learn.

95 or so with key on and about 55 with the truck running. at least those are the numbers Allen had me watch for with a three bar sensor.

i have had the problem over the past couple of days with low fuel pressure, at 18psi it was sounding deadi couldnt get more then 1/2 throttle or over 3krpm or rev it up really and after trying to rev it it would choke down and almost die then pick back up a little bit

Dayum Virgil, its always something, isn't it. :eek:

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Originally Posted by RedHeartbeat

Dayum Virgil, its always something, isn't it. :eek:

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the freakin fuel line hose that runs from the pump up to the top of the gas tank was frayed then i put a pushlock hose on it and it stil came off...that damn thing is now pushlock hose and double clamped...if it comes off again i am buying a new pump with a -an fitting on it

Pulled the plugs all looks ok there. I am planning on doing a Fuel pressure check, and compression check. Then reinstall new stuff and see whats the deal. I buddy thinks its the coils, lucky I have a spare set on the 6.0L.