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1999 Pontiac Grand Am Question: to much fuel entering one cylinder changed injector but no change

 

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jhk, 2.4L 4 Cylinder, Kewaskum, WI, April 24, 2013, 20:10
 Rookie

brake was tight and tried to drive but was hard to move and then engine had cylinder 3 misfire detected took plugs out turned it over and fuel shooting out of that cylinder even after changing injector ,what else can i try?p0303 code

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    pushrod April 24, 2013, 21:42
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     Master

    Sure it is FUEL"shooting out" of # 3 cyl? Check it again with fuel pump fuse pulled see if fluid still comes out of 3. Sure sounds like a head gasket/head problem and coolant is what you are seeing.
    UNLESS vacuum circuit for fuel pressure regulator goes to 3 then possible reg. defective. Test for fuel in vac. hose going to regulator.
    Test for fuel pressure bleed off. Pressure test cooling system!

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    jhk, April 25, 2013, 17:53
     Rookie

    yes it is fuel, replaced fuel pressure regulator, got same result ,disconnected injector wire and no fuel came out cylinder,could it be the ecm ?

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    pushrod, April 25, 2013, 18:50
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    Circuit from ecm to injector needs to be checked but i bet the computer is the culprit! Injector can not be pulsing but being held open. Driver circuit falt. What codes do you have now?

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    jhk, April 26, 2013, 17:49
     Rookie

    i would like to try and replace the ecm but can i get a new one and just put it in or does the ecm have to be programmed ?

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    pushrod, April 26, 2013, 17:56
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    Yes it has to be flashed but you can get it already done by calling NAPA with the info from the original one.

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    jhk, April 27, 2013, 19:17
     Rookie

    how do i get the info off the original? by numbers on it or by use of a scan tool?

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    pushrod, April 27, 2013, 19:24
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     Master

    These #'s are on the unit, it will have to be removed to see them.

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  • Answer #2

    goodguy April 24, 2013, 22:27
     Master

    I agree with wetry

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  • Answer #3

    Greg's Orange Auto (12997 Answers) , Orange, CA - (714) 361-9386
    globalhelper April 25, 2013, 06:43
     Master

    AGREE WITH WETRY

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