performance problem

[reeseracing23]

i have a 95 that doent run like it did. in one afternoon i put on a s&b intake, dp f5 tuner, pyro and boost gauges and a high pressure oil crossover. the truck was an animal for it seems like 3 days. it already had a big dp on it with 3 1/2 exhaust and a aftermarket muffler. then the ipr went out about a month later and i repalce it with a new ford one. i recently replace the exhaust with a mbrp 4 in setup and changed the spring in the fpr and it really didnt make any difference. if i remamber right, it use to make about 23#s of boost and now it almost makes 18. i checked the fuel pressure to day and at idle its about 60 warm but when i set the chip to the 120 hp setting, it will go down to 40-50 wide open. anu ideas

[Patrick Feeley]

Start checking for boost leaks at the intake manifolds, boots, and intake y-pipe (where it connects to the turbo too). Also look for evidence of exhaust leaks at the manifolds and up-pipes. Check to make sure the EBPV is fully open (if you still have it). Cheers!

[reeseracing23]

i already checked all of that, and the ebv is wired open. i checked the icp today and on the stock setting at 2500 rpm, 5th gear and wide open, it had around 2500 psi, on stage 4 which is 80 horse, it had about 3000 psi, and on stage 6 which is suppose to be 120 hp, it dropped to around 2500 psi. all the readings were at 2500 rpm, 5th gear and wide open. thats not to bad for a truck with 247000 miles. but i still dont know why id dosent boost like it did

[Patrick Feeley]

Check your fuel pressure at idle, and if you are able to, at WOT under load. Make sure that the FPR spring is not kinked or bent. Cheers!

[reeseracing23]

i did. it says the specs in the first post