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1992 Toyota Camry Question: About gas problem

 

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upickit, Durham, NC, December 24, 2013, 12:39
 Rookie

What does ope Ming relay have to do with fuel system?

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  • Answer #1

    ziptie12 December 24, 2013, 12:54
     Master

    ??-Open main relay? Maybe fuel pump relay?

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    upickit, December 24, 2013, 14:20
     Rookie

    Opening circuit relay

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    ziptie12, December 24, 2013, 16:59
     Master

    do you have a pressure gauge and proper adapter(s) to check & monitor fuel pressure , both with engine running and with engine off (use test connector in engine bay to operate fuel pump-key on -engine off). Get specs for fuel pressure and see what it is while not running , and how fast the pressure drops after shutting off fuel pump. Poor fuel pressure (although enough for it to run) may cause rich condition , due to injector pulse width being greater in order to compensate for the lack of pressure. Something else to do , just to help verify other conditions , would be to hook up a vacuum gauge to the intake (engine side of throttle plate) and watch reading. Post vacuum readings from both start-up , and as it warms up and under acceleration (in park-just revving to 3K) .Last thing- just to reiterate from earlier post you are POSITIVE about CAM timing?

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  • Answer #2

    G. T. Service Center (4215 Answers) , Stephenville, TX - (254) 638-3236
    ProfessorG December 24, 2013, 15:27
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     Master

    It controls the fuel pump circuit. Which engine do you have 2.2L

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    upickit, December 24, 2013, 15:34
     Rookie

    3.0L how many parts control flow of fuel?

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    ProfessorG, December 24, 2013, 15:52
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     Master

    The ECU receives a start signal, and starter signal is applied to the STA terminal. It then send voltage to the fuel pump, the fuel pump switch in the airflow meter provides the ground for the relay on start up.

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    upickit, December 24, 2013, 16:31
     Rookie

    So what would control the amount of fuel that is applied to engine. The oil level has already increased. I changed oil Sunday. Gas in oil again.

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    ProfessorG, December 24, 2013, 16:33
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     Master

    The fuel pressure regulator, injectors.

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    upickit, December 24, 2013, 18:18
     Rookie

    What do knock sensors do? Yes cams are in time. Is there anyway to cross on intake and or plenium? I 've about played out.

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    ziptie12, December 24, 2013, 19:50
     Master

    Fuel pressure PSI? Vacuum "at idle?.............?Knock sensor (single , in center under intake plenum) detects detonation and retards spark timing as needed. Common on those engines to have the wire harness get brittle and break during service/repairs. Would not be the primary cause of your symptoms , as described........Good luck. IF ABLE >>> take 24 hours to enjoy holiday and forget car..........the pause you take , may help you find the cause you seek!!

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    upickit, December 24, 2013, 21:13
     Rookie

    Thank you for words of wisdom. Have a safe and Merry Xmas!

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  • Answer #3

    winrservicesauto from A W.I.N.R. SERVICES Auto Repair, December 26, 2013, 18:14
     Technician

    Hopefully everyone had a wonderful day/vacation. In regards to "fuel in oil", try looking into the fuel injectors. It is possible that they are leaking.

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    upickit, December 27, 2013, 16:26
     Rookie

    How would u test fuel pressure regulator

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