Fuel Tank & lines
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I figure while it's down would be a good time to ask. With the fuel hat in place in the tank, what is the height at the top of the fuel lines? Basically, how much space is there between the fuel hat and bottom of the bed where first contact would be made?
So why delete the egr but not the evap?
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I remember something about turning off the EGR, also effects the EVAP system. It been like 12 years since I trashed mine..
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When you install and aftermarket hat you must use two 90* fittings for feed and return. There is maybe 3 inches of room between hat and bed area.
JJ
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Deleting EVAP without properly turning it off in the calibration screws with fuel trims for some reason. EGR deletion is a straight switch change.
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I'm not an expert but the fuel system gets pulled into a vacuum under certain conditions to verify no leak to atmosphere, that does not cause a driveablity issue. also to vent the fuel vapor into the combustion/intake under certain conditions.
EGR is pulling exhaust back into for a couple reasons. Inert gas, cylinder cooling? reversion?
I keep the canister stuff, other than weight and a little space It will not effect my street tuck build. The EGR is in the FN way, We should talk about the EGR later
I will post the clearance pics and values when I reinstall, I want to clean the entire area and tank, plus I needed to order new hose so it might be next week
EGR is pulling exhaust back into for a couple reasons. Inert gas, cylinder cooling? reversion?
I keep the canister stuff, other than weight and a little space It will not effect my street tuck build. The EGR is in the FN way, We should talk about the EGR later
I will post the clearance pics and values when I reinstall, I want to clean the entire area and tank, plus I needed to order new hose so it might be next week
You keep saying street truck. Other than Marty we all have street trucks lol
It's the correct definition. But you keep saying it like it's a rarity.
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The fuel tank vent valve is closed allowing pressure to build up, the pressure sensor tells the computer that the tank is sealed and no leaks thru the evap system, the purge valve allows that pressure and fumes to be pulled into the upper intake. The fuel system is never under a vacuum.
EGR is meant to reduce NOX and to help with fuel economy.
The DPFE can affect driveability when it goes bad.
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128 Posts
Enhanced Evaporative Emission (EVAP) System
The Enhanced EVAP system (Figure 94) consists of a fuel tank, fuel filler cap, fuel tank mounted or in-line fuel vapor control valve, fuel vapor vent valve, EVAP canister, fuel tank mounted or fuel pump mounted or in-line fuel tank pressure (FTP) sensor, EVAP canister purge valve, intake manifold hose assembly, canister vent (CV) solenoid, powertrain control module (PCM) and connecting wires and fuel vapor hoses.
The Enhanced EVAP system (Figure 94) consists of a fuel tank, fuel filler cap, fuel tank mounted or in-line fuel vapor control valve, fuel vapor vent valve, EVAP canister, fuel tank mounted or fuel pump mounted or in-line fuel tank pressure (FTP) sensor, EVAP canister purge valve, intake manifold hose assembly, canister vent (CV) solenoid, powertrain control module (PCM) and connecting wires and fuel vapor hoses.
- The Enhanced EVAP system uses inputs from the engine coolant temperature (ECT) sensor, the intake air temperature (IAT) sensor, the mass air flow (MAF) sensor, the vehicle speed sensor (VSS) and the fuel tank pressure (FTP) sensor to provide information about engine operating conditions to the PCM. The fuel level input (FLI) and FTP sensor signals to the PCM are used by the PCM to determine activation of the EVAP Monitor based on presence of vapor generation or fuel sloshing.
- The PCM calculates a variable duty cycle based on the desired amount of purge vapor flow to the intake manifold for a given engine condition. The PCM can then output the duty cycle to the solenoid on the EVAP canister purge valve. The PCM uses the Enhanced EVAP system inputs to evacuate the system using the EVAP canister purge valve, seals the Enhanced EVAP system from atmosphere using the CV solenoid, and uses the FTP sensor to observe total vacuum lost for a period of time.
- The canister vent (CV) solenoid seals the Enhanced EVAP system to atmosphere during the EVAP leak check Monitor.
- The PCM outputs a variable duty cycle signal (between 0% and 100%) to the solenoid on the EVAP canister purge valve.
- The fuel tank pressure (FTP) sensor monitors the fuel tank pressure during engine operation and continuously transmits an input signal to the PCM. During the EVAP monitor testing, the FTP sensor monitors the fuel tank pressure or vacuum bleed-up.
- The fuel tank mounted fuel vapor vent valve assembly, fuel tank mounted fuel vapor control valve (or remote fuel vapor control valve) are used in the Enhanced EVAP system to control the flow of fuel vapor entering the engine. All of these valves also prevent fuel tank overfilling during refueling operation and prevent liquid fuel from entering the EVAP canister and the EVAP canister purge valve under any vehicle altitude, handling or rollover condition. The liquid/vapor fuel discriminator is part of the fuel vapor control valve assembly on Escort and Focus applications.
- The Enhanced EVAP system, including all the fuel vapor hoses, can be checked when a leak is detected by the PCM. This can be done by pressurizing the system using Rotunda Evaporative Emission Tester kit 134-00056 or equivalent and the leak (frequency) detector included with the kit.
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Yup, FTP sensor. Fuel Tank Pressure sensor.
The fuel tank does not get drawn down to a vacuum. It never sees 30inches of mercury. It gets sealed and then pressure lost, vacuum bleed up is checked.
Either way deleting the system serves no purpose on a street truck and has to be configured correctly in the tune calibration when deleted.
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The fuel tank does not get drawn down to a vacuum. It never sees 30inches of mercury. It gets sealed and then pressure lost, vacuum bleed up is checked.
Either way deleting the system serves no purpose on a street truck and has to be configured correctly in the tune calibration when deleted.
[email protected]
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