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Posted on Feb 06, 2009
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Won't run with the correct firing order

I have a 1990 Mustang 5.0 and I'm having problems with the firing order. in the internet it gives me 1 3 7 2 6 5 4 8. but will not run smooth, backfires through exhaust and intake. I used the old ford firing order 1 5 4 2 6 3 7 8 and the vehicle runs better but still misses and has LOW power. can anyone help I am confused.. Have put in new map sensor and engine computer again please please help..car is stop no modifications

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  • Anonymous Mar 18, 2014

    motor want idle and run bad

  • Anonymous Mar 28, 2014

    cylinder 5 location

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3 Answers

Anonymous

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  • Posted on Feb 06, 2009
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Hi the firing order for a 5.0-302 is 15426378 and the fireing order for a 351is 13726548 save to file and zoom in
won't run with the correct firing order - c0b569d.jpg

  • Anonymous Feb 06, 2009

    this goes with the pic

    the rotation for a 5.0 is clockwise

    the rotation for 351 is counterclockwise

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  • Ford Master 783 Answers
  • Posted on Feb 06, 2009
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The firing order for that year should be the 13726548 counter clockwise. And the cylinders are right bank (passenger side) 1,2,3,4 and left bank drivers side 5,6,7,8.

  • Anonymous Feb 06, 2009

    That is if it is an HO motor. And if I remember correctly that was the only one in a fox body mustang.

    But if it is Not an HO motor then it is the 15426378 firing order.

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It is the first firing order, are you going counterclockwise?

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bcd56b8.jpg


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