low boost psi, wtf

supradad86_5 · 06-05-2007, 03:35 AM

So this morning it boosted up to 13psi when the engine was still kinda cool, then after running for about 15 min it would only boost to 8psi. I rechecked all of the vac. hoses and intake piping, everything is tight and in it its place. I did run it again this evening without the wastgate acuator hooked up and it still boosted up to 8psi, so I am getting to the point that I think I can rule out the aftermarket gauge because if it did boost all the way up it would have hit fuel cut which it didnt. Any other ideas, anything would be helpful at this point.

turbo 352 · 02-09-2014, 01:39 AM

Quote:

Originally Posted by supradad86_5

So this morning it boosted up to 13psi when the engine was still kinda cool, then after running for about 15 min it would only boost to 8psi. I rechecked all of the vac. hoses and intake piping, everything is tight and in it its place. I did run it again this evening without the wastgate acuator hooked up and it still boosted up to 8psi, so I am getting to the point that I think I can rule out the aftermarket gauge because if it did boost all the way up it would have hit fuel cut which it didnt. Any other ideas, anything would be helpful at this point.

Check your oil pressure sounds like your losing pressure after warm up.

supradad86_5 · 02-09-2014, 02:05 AM

This was a hose issue back in 2007, back when I still had a Supra. Thanks for the input though.

06-05-2007, 03:35 AM	#1
supradad86_5 Stock Join Date: Apr 2007 Location: Bonney Lake, Wa Posts: 20	So this morning it boosted up to 13psi when the engine was still kinda cool, then after running for about 15 min it would only boost to 8psi. I rechecked all of the vac. hoses and intake piping, everything is tight and in it its place. I did run it again this evening without the wastgate acuator hooked up and it still boosted up to 8psi, so I am getting to the point that I think I can rule out the aftermarket gauge because if it did boost all the way up it would have hit fuel cut which it didnt. Any other ideas, anything would be helpful at this point. __________________ 86.5 JSPEC 7MGTE 5SP, 14psi, HKS 2MM MHD, CENTERFORCE ST 2, 3" TURBO BACK, MANUAL BOOST CONTROLLER, JDM INTERCOOLER AND 2.5" HARDPIPES, APEXI NEO, WALBRO 255LPH, LEX AFM, DRILLED AND SLOTTED ROTORS AND RACE PADS, 18" STAGGERED 275/40 REAR, 245/40 FRONT. NEXT ON LIST: PAINT, JZA70 FRONT BUMPER, CARBON HOOD, RS RACE SPRINGS, POLY BUSHING KIT, SWAY-BARS.

02-09-2014, 02:05 AM	#3
supradad86_5 Stock Join Date: Apr 2007 Location: Bonney Lake, Wa Posts: 20	This was a hose issue back in 2007, back when I still had a Supra. Thanks for the input though. __________________ 86.5 JSPEC 7MGTE 5SP, 14psi, HKS 2MM MHD, CENTERFORCE ST 2, 3" TURBO BACK, MANUAL BOOST CONTROLLER, JDM INTERCOOLER AND 2.5" HARDPIPES, APEXI NEO, WALBRO 255LPH, LEX AFM, DRILLED AND SLOTTED ROTORS AND RACE PADS, 18" STAGGERED 275/40 REAR, 245/40 FRONT. NEXT ON LIST: PAINT, JZA70 FRONT BUMPER, CARBON HOOD, RS RACE SPRINGS, POLY BUSHING KIT, SWAY-BARS.

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