The Fuel Tank Pressure sensor signal varies between ground and 5. I was just wondering if some one else has had this problem. Feb 01, 2011 I have a 2001 base impala and 6 months ago I experienced the same problem. I was running rich due to poor thermostat and I think since I changed that this morning it solved my problem because Im now in proper operating temperature. Inspect the sensor connector for corrosion at the wires. I think someone told me that very certain and specific conditions must be met before the Test will run again, which could take months to happen. So, check gas cap, check vacuum lines from fuel tank and trace the lines making sure there is no break.
If the voltage changes with vacuum applied, the sensor is operating. Thank you for using FixYa, have a nice day. Then about two years ago, my fuel gage went on the fritz due to the sending unit in the tank. Is there a way to force an evap test? If you clean both of the O ring surfaces, and use vaseline, it will go in very easily, use the new O ring. I definitely had hard starts, until I let it prime a couple seconds to build pressure then start. If a leak is detected, then a code is set in the engine control module and the check engine light is illuminated.
You should also check that the spark plug gap is set properly. I know not to brake but the Helms book didn't mention not to shift though in tests 5 and 8. With a multimeter, verify your reference wire has 5 volts and check the continuity of the ground circuit. It is used only for on board diagnosis. The Fuel Tank Pressure sensor voltage increases as the fuel tank pressure decreases negative pressure, or vacuum.
It sounds like the charcoal -filled canister, it's near the gas tank in a cylinder shape. Observe the fuel tank pressure sensor voltage with a scan tool. P0452 Description The Evaporative Emission System control system pressure sensor detects pressure in the purge line. Did you find and correct the condition? Refer to in Wiring Systems. Always stay almost empty or full after a code clearing? Did you complete the replacement? I'm a combat disabled vet and cutting the floor worked for me, instead of dropping the tank. Did you find and repair the condition? When I parked it last night it had a half tank of fuel.
Refer to in Wiring Systems. That is the reason I am asking if there is a. I've replaced it already several times and got used to paying attention to mileage for knowing how much gas I have. I may have to get the dealer involved. This cluster only has a few miles and I know it to be good.
Me, I stuck with delphi since that's what is used by the manufacturer. I pulled over and neither of the shifts engaged. Always stay almost empty or full after a code clearing? Refer to in Wiring Systems. However, poor connections often result in high resistances in some parts of the circuit, which is why it is important to perform resistance and continuity checks during the diagnostic procedure. Most gauges measure vacuum in inches of mercury Hg and pressure in pounds per square inch psi.
But the pump, I think you should get delphi or bosch. I did a post about a year ago on my old 93 S-10 Blazer where I used the O-Ring that came in the box with the new Fuel Pump and found out it was. Other possible causes of low input voltages include poor installation of aftermarket components, poor quality aftermarket components like fuses, relays, and switches, and modification of the electrical system that could include the use of conductors that are not rated for use in a particular application. Did you find and repair the condition? But yours is 0442 which, from what these forum says, is a larger leak if I'm not mistaken, so I not sure there. If the sensor was reading high voltage and that disappears when the sensor is unplugged, check for proper ground and ensure you have 5-volt reference voltage. The information supplied by the fuel tank pressure sensor to the Engine Control Module is used in order to detect vacuum decay or an excessive vacuum during the diagnostic routine. Any Help would be appreciated.
So the big question is how to fool the testing. About 3-4 months ago, My Fuel pump went completely out. Between the two it's all over the place. This may sound crazy but how is your thermostat. It may be attached to the fuel tank or it may be separate from the fuel tank with hoses running to the fuel pump at the fuel tank. H2O of pressure to -17.
I'll try again tomorrow night and let you know how I made out. Refer to in Wiring Systems. My fuel gauge floats around all the time but it does show full when the tank is filled and E when the tank is empty. Better yet I know some hard codes can be stopped in earlier pre-96 Fords by adding resisters or by supplying a correct reference signal voltage to the computer. What is so special about these classroom case studies? I will get back on it tomorrow.
There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere! Did you find and repair the condition? Wiggle along the length of the circuit, monitoring the reading on your to see if there are fluctuations in the voltage. First thing to do is make sure the gas cap is good and tightened properly. I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. Did you find and correct the condition? Unless I can defeat the signal. You may have to remove loom or electrical tape to inspect the wiring.