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HELP! 50% loss of power!

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  • HELP! 50% loss of power!

    ok was driving to work this morning when i blew a heater hose fitting at the check valve connector, coolant everywhere smoke everywhere not a nice site... well i got it towed, got some new heater hoses filled up with coolant and and bled system seemed ok, but when i took it out for a drive, the air fuel meter was pinged at full rich even at 1500rpm! the motor and car shake and there is a serious loss of power probably around 50% i have no idea what this can be minus replacing every sensor... im pretty sure its a fuel issue but im also keeping in mind the optispark which i just did a year ago... now if it was an optispark why would it run totally rich!? im guessing its a fouled sesnor somewhere but where minus replacing them all! i doubt its a headgasket becuase i didnt see any water in the tailpipe and no fluctuating temp after i filled the cooling system... also when i pulled over this morning to shut the car off i noticed the temp around 250ish and there were no idiot lights going off either which really boggles me... any suggestions would greatly be appreciated!

    -chris

  • #2
    Posibly the map sensor or the maf?
    96 Camaro Z28, T-tops, 6 Speed, Slp CIA, Flowmaster cat-back, 3:42 gears

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    • #3
      the maf has been relocated to the drivers front bumper on the other side, the maf is descreened i looked at the resistors and looked pretty normal... the air filter was dirty but not filthy however if coolant soaked that i wonder if it affects the foam that much? how do you tell if a map sensor is bad, could a clogged map sensor do something like this it sits in a 3'16 bore on the intake?

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      • #4
        One word..... scanner. You need to read exactly what the sensors are communicating with the computer.

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        • #5
          which scanner and where can i get it joe?

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          • #6
            If you get any antifreeze on an O2 sensor & wiring harness, it will ruin the oxygen reference and the car will run pig rich. Just something to check besides the usual stuff you probably already thought of. It should show up on a scan.

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            • #7
              ok got it to my buddies shop he put it on the machine its coming up as a camshaft posistion sensor. we're goingt o try to get one and throw one in there tonight.... now i have an older junk optispark module can i salvage that camshaft position sensor out of that?

              -chris

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              • #8
                Just a thought ..dont be to suprised if the crank position sensor is fine. I drove my bird thru a major puddle a few years ago and the car went into limp mode..replaced the sensor, cleared the code. started the car code returned immediatly...Took the car to the dealer they put a second crank sensor in it even though I told them I had installed a new GM sensor...They scanned the car and couldnt figure it out. The removed my LT4 knock module, reflashed the PCM (losing a great tune in the process) still broke. They then called Pontiac in Detroit and finally replaced the Opti (three days latter) problem solved...I hope your car is a simpler fix

                Good Luck
                Bob
                1997 Trans AM WS6 vert
                1 of 463
                LT4 knock module
                D. Goetz sub-frame connectors.
                strut tower brace
                SLP fan switch
                160* t/stat
                Drilled and slotted rotors/ Earls SS brake lines/ Hawk pads
                DMS 1.5" progressive lowering springs


                Pictures Here

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                • #9
                  so you replaced the optispark and that fixed your problem?

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                  • #10
                    yes ..the dealer did and thats the last time the dealer will ever see my car
                    1997 Trans AM WS6 vert
                    1 of 463
                    LT4 knock module
                    D. Goetz sub-frame connectors.
                    strut tower brace
                    SLP fan switch
                    160* t/stat
                    Drilled and slotted rotors/ Earls SS brake lines/ Hawk pads
                    DMS 1.5" progressive lowering springs


                    Pictures Here

                    Comment

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