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Old Nov 10, 2004 | 08:12 PM
  #1  
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dieselstroke
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From: whitney
Question over boosting?

my truck hates hills, hills that most gas engine trucks could fly up mine drags
its *** up. It will go up a fairly fast rate, but with a lot of boost sometimes
up to about 15. theres a grade here just out of town thats not steep but
long, if i wanted to keep 70 i would have to be running 5,6 maybe 7 lbs of
boost and the engine sounds like its hauling a 25 foot goosenck with about
8k lbs on it. I mean it has to flat work. Im beginning to wonder about this
engine and how powerful it really is, & i hate to say that but its not that
impressive to me.
 
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Old Nov 10, 2004 | 08:18 PM
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From: whitney
oh failed to mention its a 99 has a 4r100 a part # 6637 air filter sp module (stage 1)
i believe and 161k. new fuel filter
 
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Old Nov 10, 2004 | 09:12 PM
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From: colorado
what is the max boost you can attain? because the numbers you are quoting are pretty low for pulling a hill if you have your foot in it. you should be able to get close to 20psi stock and more with a chip. 1st thing check all you intercooler and intake boots(the rubber hoses that connect the intercooler tubes and the intake manifold tubes) to be sure the clamps are good and tight, there are 4 intercooler tube boots and 2 intake manifold tube boots.
 
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Old Nov 11, 2004 | 03:54 PM
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From: whitney
im not sure, well today i drove 70 up the grade 7 psi all the way up it and a hair over
800 degrees pre turbo. Oh Im sure i can get 20 lbs of boost, it will get up to 15 real
easy and more if i want, but by that time its almost running 1200, and working its ***
off.
 
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Old Nov 11, 2004 | 03:57 PM
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From: NorCal
Could be your tranny....
 
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Old Nov 11, 2004 | 04:03 PM
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From: whitney
i dunno it feels solid, like the torque converter or the clutches arent slipping.
 
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Old Nov 11, 2004 | 04:08 PM
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From: colorado
i still dont think you are making enough boost, and now with the added info of you way to high EGT i would also start looking for ubstructions in the exhaust system. check the cat(if you have one) try to confirm that your EBPV is opening.as well as checking you boots
 
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Old Nov 11, 2004 | 04:32 PM
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From: whitney
i dont have a cat converter so i wont check that lol, I dont see how a muffler could
actually get plugged up so i dont think its that, now I will check the boots & i will
check the butterfly valve, wait how do i check it though?
 
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Old Nov 11, 2004 | 04:39 PM
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I don't think there's anything wrong with it. 7 psi and 800 degrees to hold 70 mph up a grade sounds normal to me...and being able to punch it to 20 psi and 1200 suggests there is plenty left.

Maybe you just aren't used to how loud the PSD is when you wind it up....dosen't mean it's working particularly hard, just that it's loud.
 
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Old Nov 11, 2004 | 04:45 PM
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From: whitney
yeah could just be me, i do kinda think maybe the ebpv is possibly staying partially
shut tho, how do i check it, better yet cant you adjust it to where it stays open all
the time?
 
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Old Nov 11, 2004 | 04:54 PM
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Originally Posted by dieselstroke
yeah could just be me, i do kinda think maybe the ebpv is possibly staying partially
shut tho, how do i check it, better yet cant you adjust it to where it stays open all
the time?
Yeah, at the base of the turbo pedestal is the actuator plug for the EBV, simply unplug it to default open.
 
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Old Nov 11, 2004 | 04:57 PM
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From: whitney
the wire connector plug?
 
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Old Nov 11, 2004 | 05:02 PM
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Yep, the electrical connector.
 
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Old Nov 11, 2004 | 05:09 PM
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From: colorado
Originally Posted by cookie88
I don't think there's anything wrong with it. 7 psi and 800 degrees to hold 70 mph up a grade sounds normal to me
that seems real high to me. even driving in the mountains pulling those hills i would not see 800* at 70 mph in an empty truck, and my boost would be much higher than 7 psi(even in stock mode)i run 5-7 psi on level ground at 70 mph. i just got back from hunting and pulling a trailer with 2 atvs on it and the bed loaded with some gear i was around 850* at 70-75 the whole way. i guess it would suprise me if the few mods i have done to my truck would make that big of a difference
 
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Old Nov 11, 2004 | 07:40 PM
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From: whitney
well here's the deal, I unplugged that connector, i tightened both boots on the inter
cooler pipe on the hot side or exhaust side how ever you'd say it. I've heard of ppl
having a oil leak after disabling the ebpv, surely not? Tomorrow afternoon, after I get
back from work, Im gonna try & remember to post how it does tomorrow. And i did
drive it just 5 mins ago but it was all flat and level and partly in town.
 
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