losing boost

[97cherokee]

hey guys i noticed the other day taht my truck was struggling to build 18 lbs of boosy on the daily tune, usually under a load it will build 22-28 psi on the daily tune. so i turned it up to the hot tune where it would usually almost instantly build 25+psi, it would go up to 14-18 and then down to 10 psi almost as if starving for fuel. fuel psi reads 65-72 psi under a pull so its got good fuel psi. also i did a service on the truck becausei was right there at it and no change. i do not hear a boost leak nor do i believe that i have one because of the boost psi fluctuations. if it would routinely hit a number then i would say a boost leak. also i noticed this after changing the rubber elbow at my waste gate which i have ran in very tight. any ideas? i want to say i changed that elbow friday evening and didnt drive the truck until saturday night and sunday is when i noticed the boost issue.

 

[ghohouston]

Build a boost leak detector after you look over everything you touched. Do you actually feel a loss in power, or are you going solely by the boost gauge? Gauges fail

 

[PMFB]

Check filters. Or maybe bad fuel.

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[6.0 Tech]

Check the air filter, possibly causing the ntake tbe to suck in, if you have rubber in there anywhere. Also, do you have any exhaust leaks?

 

[97cherokee]

ok so i unhooked the waste gate this morning and i was back to full boost... i though that the waste gates did nt start to open on these till 21-22 psi. is there a controller for the waste gate?

 

[lincolnlocker]

ok so i unhooked the waste gate this morning and i was back to full boost... i though that the waste gates did nt start to open on these till 21-22 psi. is there a controller for the waste gate?

just leave it unplugged from the waste gate actuator and plug it or put it on a ic boot clamp.. no need for it to be plugged in on a tuned truck.. wg will open on spring pressure alone..

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