Question about 1990 Chevrolet S 10 4WD

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I need the firing order for 1990 chevy 4 cylinder 2wd pickup

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  • j2llambert Apr 30, 2010

    i dont understand that diagram it doesnt show the order of the distributor cap



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1999 Chevrolet S10/T10 P/U 2WD 2.2 liter L4 VIN "4"

i need the firing order for 1990 chevy 4 cylinder - cab1d08.gif

Hope this help (remember comment and rated this).

Posted on Apr 30, 2010

  • ZJ Limited
    ZJ Limited Apr 30, 2010

    1990 Chevrolet Truck S10 P/U
    2WD 2.5L TBI 4cyl

    The firing order is 1-3-4-2. Count from front of engine 1 -2-3-4. 4 in
    back. Now under your distributor cap is a rotor.
    Remember were the rotor is pointed to. Now set the distributor cap back

    The firing order will start at the post that the rotor was pointed.
    That post will be No: 1. Put the plug wire on it & on your fist plug
    in front of engine. Now looking at the distributor, go {clock wise} to
    the next plug wire on the distributor & it will be N0: 3. Put it on
    the 2nd plug from front to back of engine. Do the same steps for the
    next two 4 & 2.
    As long as you have not taken the hole distributor out of the engine.
    all should be well. If you have taken out the distributor, then you will
    need to re-take it out again. And pull out the No: 1 spark plug. Then
    turn the crankshaft over to the two marks on the front bottom pulley.
    This will bring the N0: 1 piston to the top of the cylinder head &
    the mark at 0 on bottom. If one of your vales are open at this point,
    then turn over the engine once more to the mark. Check & make sure
    that the N0:1 piston is up, & both vales closed. Now set the
    distributor back inside, with the rotor pointed at the front right of
    the engine . Remember this is were to start from when you put the
    distributor cap back on. At this point front right will be No: 1 &
    go {clock wise} to 3 4 & 2. Hope you did not need to go through all
    of this & only needed the firing order.

    Good Luck!



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