Mitsubishi L200 Turbo Overboost – Power Limitation Problem Power restriction under heavy acceleration, mostly in second and occasionally in third gear was the symptom. It was almost as if the turbo had cut, if you released the throttle and reapplied it or in the case of third gear – changed down power would be restored.
I had swapped it out for an aftermarket unit which did not leak and I was overboosting to 21 PSI with an ECU tune set to open the wastegate on base spring pressure alone. Not good. Returning to the leaky OEM BPV allowed boost to be controlled again and brought under 18 PSI. Obviously not ideal, but, it's a wastegate problem. A common complaint and a reason why the original Garrett turbocharger requires replacement is overboosting. The turbo tends to over boost and at times have an erratic boost curve as it spools up. It is not uncommon to see the GT2052v Garrett turbo on the ZD30 Patrol spike in boost pressure to well over 20psi.
Sep 13, 2016 · BTN Turbo say possible reasons why the EGR valve may fail to open include blockages, air leaks or a faulty electric switch pressure converter valve. If the EGR valve fails to close, this may be caused by heavy deposits on the tappet or valve. Not normal to hear a hissing sound from the rear turbo, could be noise from the rear vac/boost pipe rear turbo wastegate split/popped off? which would cause your overboosting. I`ve not seen my rear wastegate rod but yout could probably feel it on a COLD engine not running. Sounds like a rear wastegate line`s popped off to me? Feb 02, 2018 · I show where the main problem was and what I done to rectify it. ... 2004 XC90 Volvo turbo Overboost problem repaired P0234 - Duration: 3:43. Clock Doc Brown 46,441 views. 3:43. May 02, 2007 · As title, My TT turbo is running 1 bar of boost, and the company reconditioning my turbo is having problems getting it reliable, ie 150miles between rebuilds . All that I have had done is a slightly larger compressor wheel, the symptoms of failure are oil everywhere, the report suggests the turbo...
However, what many people have done with their Arrow, including the one I fly, is to replace the factory fixed-wastegate turbo setup with one from Merlyn. The variable wastegate fixes the problems of overboosting with the original and provides about a 5% increase in speed and a higher top altitude. $\endgroup$ – JScarry Dec 1 '17 at 15:14 A problem we are seeing more and more on the 6 cylinder twin power turbo N55 motors is faults on the X5 Boost Pressure control. The fault code can stem from a few sources, especially if customers modify their vehicles for more power.