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Q: Irregular turbo function on 2006 Dodge Sprinter 2500

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At about 80 000mi my turbo resonator started to leak. Van went into "limp home mode" and I had to drive it another 200 mi (drove like a snail...) to get it fixed. Got it fixed (resonator replaced) but after about 9 000 mi the symptoms of leaking resonator came back, so I got one made out of aluminum instead of the plastic piece of ...Anyway, I installed it, however the turbo desn't seem to be working properly. When I try to accelerate, first it goes, then stalls and then rapidly accelerates but only for a short period of time. This cycle repeates for as long as I keep accelerating. The OBD II scaner shows no codes. Any ideas what it could be? Greatly appreciated.
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Low turbocharger boost pressure and low engine performance can be caused by leaks in the charge air cooler or it's plumbing. The below procedure outlines how to check for leaks in the charge air cooler system.
· Turbo Resonator: Inspect the resonator (muffler, connected to the turbocharger) for air leaks at the seam between the two shells.
· Exhaust Gas Recirculation (EGR) valve: A sticking EGR valve influences the mass air flow causing implausibility with MAF, which displays one or more DTC's. Don't replace the EGR valve if no DTC's are present. Use the below EGR valve Diagnostic Procedure to determine if replacement is required.
· Mass Air Flow Sensor (MAF): The mass air flow, measured and provided by the MAF is critical for calculations performed by the ECM and may result in several DTC’s related to the air intake system if not accurate.
· Boost Pressure Sensor: Make sure that the correct part with number 5117545AA (Mercedes Benz part number printed on sensor: A 004 153 84 28) or superseding part number is installed. The Boost Pressure Sensor for an OM612 engine would fit mechanically on an OM647 engine but will result in poor performance.
· Turbocharger: Consider that an operating turbocharger creates a flow sound, which is normal and does not require replacement. Other sounds like whistling are potentially caused by the resonator or improper line connections.
Hi Johnny,
thanks for your response. In fact, I did find a little crack in the air intake hose, so I got a new one, replaced it and everything seems to be working great again. Thanks a lot!
took your advice and replaced the Boost Pressure Sensor. $85 from our Sprinter dealer. This after they could not get our 05 Sprinter to run without black exhaust. The $1500 EGR job they did had no effect. They had a turbo on order but we canceled it, suspicious that it was ok, saved ourselves $3000.
I had pressure tested the intake up to the manifold to about 15 psi using some plumbing fittings, so I knew it was not a leak.
The really amazing thing is we trusted them to diagnose it correctly, they had found the code for Low Boost Pressure, but after having the vehicle for 2 weeks they were still baffled but tried to talk us into a turbo and actuator assembly.
We did the fix in my driveway.
Many thanks for the advice. It runs great again, using a part number A 004 153 99 28.
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