E-Series VansTechnical discussion of topics related to vans powered by any of the Navistar engines. This covers a broad number of years, but there isn't enough demand to split it any further.
At idle I do not hear the noise, but just off idle at 2 or 3 mph I hear a noise that for a better term, sounds like a sucking /rumbling/growling sound from the engine compartment and the van looses a small amount of power. The power loss would compare to an ac compressor kicking in. When you let off the throttle the sound goes away. You can hear and feel it up to maybe 20 mph, then the road noise etc. takes over. When the engine is cold, it is not noticeable until I drive it a mile or two. I thought maybe it was the vacuum pump making noise, but that would not explain the power loss I don't think. It starts great and no other noticeable symptoms. Any ideas?
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1998.5 E350 7.3 extended cargo with Late model doors ,po.wer windows, locks and mirrors.Isspro gauges from DPPI, Power Slot Cryo rotors from DPPI, Hawk LTS from DPPI,NAPA DOT 4 brake fluid,NAPA calipers,Evans coolant,Dieselsite ac control valve,Dieselsite 203* thermostat,BTS valve body, Amsoil tranny fluid,4WD deep tranny pan from Dieselsite, DieselSite transmission bypass filter,Amsoil dual oil filter, Amsoil 15-40 wt oil,4 inch Warpspeed Performance exhaust,Thermo-Tec Exhaust Insulating Wrap, Bilstein shocks,Line-X 2-06-2009 103,400 miles following added Beans stage II single shot injectors, Air Dog, Beans regulated fuel return with fuel bowl delete, glow plugs and Stancor gp relay, Beans modified IDM, Stealth HPOP stage I, Dominator 66 turbo, DpTuner reflashed factory pcm that was split shot injectors to the single shots, 9 tunes from DP Tuner including decel tune,tuflocs on all doors, Snow water-methanol injection stage 3 installed by Beans Diesel, BTS tranny
Its your exhaust back pressure valve (EBPV). Its closing due to low oil and air temps. Its for a faster warm up. Most have system disconnected due to oil leaks.
Thank you for the reply. I will do a search to see where the EBPV is located, then check it for leaks.
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1998.5 E350 7.3 extended cargo with Late model doors ,po.wer windows, locks and mirrors.Isspro gauges from DPPI, Power Slot Cryo rotors from DPPI, Hawk LTS from DPPI,NAPA DOT 4 brake fluid,NAPA calipers,Evans coolant,Dieselsite ac control valve,Dieselsite 203* thermostat,BTS valve body, Amsoil tranny fluid,4WD deep tranny pan from Dieselsite, DieselSite transmission bypass filter,Amsoil dual oil filter, Amsoil 15-40 wt oil,4 inch Warpspeed Performance exhaust,Thermo-Tec Exhaust Insulating Wrap, Bilstein shocks,Line-X 2-06-2009 103,400 miles following added Beans stage II single shot injectors, Air Dog, Beans regulated fuel return with fuel bowl delete, glow plugs and Stancor gp relay, Beans modified IDM, Stealth HPOP stage I, Dominator 66 turbo, DpTuner reflashed factory pcm that was split shot injectors to the single shots, 9 tunes from DP Tuner including decel tune,tuflocs on all doors, Snow water-methanol injection stage 3 installed by Beans Diesel, BTS tranny
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Its your exhaust back pressure valve (EBPV). Its closing due to low oil and air temps. Its for a faster warm up. Most have system disconnected due to oil leaks.
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Its your exhaust back pressure valve (EBPV). Its closing due to low oil and air temps. Its for a faster warm up. Most have system disconnected due to oil leaks.
Bill
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You mean, it'll cause oil leaks?
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Nope, eventually you get oil leaks from the actuator rod in the turbo pedestal that operates the EBPV.
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While I love diesels, I don't need one, and unfortunately, after much deliberation its a hobby I currently cannot afford.......... Gone but not forgotten:
1999.5 F250 CC SB XLT 4WD, 7.3 PSD, First F,2nd Diesel, nice but still liked the van better.
2003 E-350 Super Duty Chateau (Club Wagon)7.3PSD, 3rd Clubwagon,First diesel, Never should have sold it....
The EBPV engages when the motor is cold to give a faster warmup and to build more heat at idle. It partially blocks the exhaust, which is why you feel a power reduction.
If it is still engaged when the motor is hot, then there is a problem. Otherwise what you are experiencing is normal.
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1985 International rollback, 6.9L 5 speed "Li'l Big Truck"
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