02 sensor?
#1
02 sensor?
ok, so ive been getting terrible terrible gas mileage, like.. 140 to a tank. Bad power, and some erratic idle. Im wondering if it could be my 02 sensor and if so, should i replace upstream or the downstream? My CEL was on for about a week and shut off. Tried to scan it today, and no codes showed up. Help
#3
I would do plugs ,wires ,air filter first .....if your car was throwing a code for an o2 sensor it should still show up as a stored memory code . Your code was probably not related to an o2 sensor and it cleared itself after so many starts ......
#4
Yeah, you need to have some kind of reference that the small stuff is all within maintenance parameters. New- plugs, wires, fuel filter, air filter, ect.. Suck a can of Seafoam up the pcv valve to clean the upper intake manifold.
Next time it throws a code it will be specific, and then you can perform a diagnostic test.
Next time it throws a code it will be specific, and then you can perform a diagnostic test.
#6
It refers to the fuel filter, when you replaced it, did you see "rusty " colored fuel come out when it was tilted? That would indicate another filter is need to be installed. The other thing mentioned is ignition- Improperly gaped plugs (.052), incorrect plugs installed (BEST:NGK, Autolite, Motorcraft Copper Core or Platinum.), brakes binding & not fully releasing, dirty fuel system*, vacuum hose leak to upper intake manifold.
-*Seafoam the upper intake manifold while engine is running. Put a straw inside the can, pull out the pcv valve, and let the pcv valve slowly suck in the Seafoam.
-*Inside the gas tank- Pour a can of "BG 44K" (Any service shop or dealer sells it) Or pour a full can of Seafoam into the gas tank.
-****Try it! It wont hurt and will help better diagnose any other issue there might be.****
Vacuum leaks around the EGR are very, very common. They are plastic and brittle. Break easily. Good luck, and update.
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