Reducing pumping losses in and out of an engine boosts efficiency and may improve performance, like when the exhaust backpressure valve is on a 7.3 Powerstroke EBPV Delete. While the valve area seems relatively modest in the open position, multiple reports indicate that an EBPV deletion will decrease EGTs and enhance turbocharger responsiveness.
OPERATION OF THE 7.3L POWER STROKE EBPV
The exhaust back pressure valve is a simple device that restricts exhaust flow and effectively simulates a strain on the engine to minimize the time necessary for an engine to attain operating temperature. The valve is a primary butterfly type that is attached to the turbocharger’s turbine outlet. The EBPV is linked to the EBPV actuator through a simple connection. The actuator has a plunger/piston that goes forward and backward. The engine oil flow into the actuator is controlled by an EBPV regulator/solenoid, which regulates the actuator’s range of motion. During the warm-up process, the EBP sensor at the front of the HPOP reservoir is utilized to determine the correct position of the EBPV. When the engine reaches working temperature, the system is turned off, and the EBP valve is left open.
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- Decreased engine performance and turbocharger efficiency (removing EBPV reduces turbocharger lag and improves performance characteristics).
- Produces higher exhaust gas temperatures (EGT), mainly when performance-enhancing aftermarket equipment is used.
- The EBPV regulator and actuator at the back of the turbocharger are prone to leaking engine oil; they are not easily accessible and can only be serviced with the turbocharger removed.
• It is costly to rebuild/repair the EBPV regulator and actuator.
The two disadvantages of removing or deactivating the EBPV are as follows: 1) the engine will take longer to achieve operating temperature. It is not a huge worry in warmer regions. Still, it might have a severe influence on engines, starting in freezing situations where fuel dilution is already severe. 2) The engine will emit more pollutants due to the difference in time required for an engine to attain operating temperature with and without the EBPV. It is unlikely to be a severe issue for most people. Still, because the EBPV is an emissions control device, it must be completely functional for emission testing in locations where they are necessary.
DELETE OPTIONS FOR EBPV
The “proper,” or should I say “most comprehensive,” way to remove the EBPV is to buy a non-EBPV turbocharger pedestal and a non-EBPV turbine outlet. Garrett, the OEM turbocharger manufacturer for all 7.3L Power Stroke diesel, makes both of them. These components have the following part numbers.
- The Garrett 448179-0005 non-EBPV turbine outlet: 1994.5 – 1999 (early)
- Garrett 448486-0004 non-EBPV turbocharger pedestal, 1994.5 – 1999 (early)
- The Garrett 451274-0005 non-EBPV turbine outlet: 1999.5 (late) – 2003
- Garrett 702670-0002 non-EBPV turbocharger pedestal, 1999.5 (late) – 2003
A second, far cheaper way is to remove the valve, gut it, and disconnect the EBP regulator. Remove the butterfly valve, block the holes with freeze plugs or other ordinary hardware, and replace it. When the regulator is disconnected, the piston on the actuator remains in the retracted position. The drawbacks of this procedure are that 1) it will generate a soft DTC, and 2) the actuator and regulator may develop an oil leak over time. Simply disconnecting the EBPV to obstruct its operation undermines the clear benefits of eliminating the limitation and is thus a pointless method.
A third alternative is to remove the EBPV (see the procedures below) and replace it with a non-EBPV turbine outlet while preserving the stock EBPV turbocharger pedestal. This approach removes the limitation but saves money by eliminating the price of obtaining a new turbo pedestal. All the equipment needed to replace the turbocharger. In the future, the actuator and regulator may leak once again.
MODEL EBPV 470 OHM RESISTOR
To disengage the EBPV electrically without removing any pedestal components, remove the two-prong connector located near the compressor intake on the compressor housing. Even if the connection is disconnected, the PCM will detect that the EBPV system is operational. However, the PCM will detect that the system is not operational and will generate a DTC. May solve This problem with our 7.3L Power Stroke EBPV connection plug. You can jump the two-prong connector on the harness side with a 470, 1 Watt resistor and tape/heat shrink it firmly.
PROCEDURES FOR EBPV REMOVAL
Note: EBPV deletion was conducted on 7.3L Power Stroke engines manufactured between 1994.5 and 1999. The concept is the same for subsequent 1999.5 – 2003 model year engines. However, will somewhat the functioning altered.
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• If you are changing the pedestal, go 1994 – 1999. Turbocharger removal on a 7.3L Power Stroke
• Disconnect the intake Y pipe.
• Remove the exhaust downpipe and tuck it as far down as possible between the engine and the firewall.