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1997 Pontiac Firebird Question: DTC misfire on cylinder 3

 

Question

DiggersBunny, San Angelo, TX, November 15, 2012, 23:04
 Rookie

CEL came on steady, then began flashing for short periods... while flashing car ran very rough and wouldn't accelerate well. Almost acted as though running out of gas. Then in 20 seconds or so would be smooth while light was steady.
When checked the diagnostic code was DTC misfire on cylinder 3.

3 Answers
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  • Answer #1

    pushrod November 16, 2012, 05:11
    Profile_thumbnail
     Master

    What engine 3.8 or 5.7? The ignition systems are different i think. On the 3.8 6 coils. On the 5.7 distributor system. I think!
    Could be a bad coil on 3.8 or plug or wire if lntermittent spark. Cold be cap wire or plug on 5.7. Again if spark is the problem.

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  • Answer #2

    Greg's Orange Auto (13428 Answers) , Orange, CA - (714) 361-9386
    globalhelper November 16, 2012, 06:48
     Master

    you obviosly have a misfire on #3 and like is flashing to tell u you may damage catt so seek a diag and est or repl # 3 plug and see what happens

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  • Answer #3

    ziptie12 November 18, 2012, 07:49
     Master

    also check for spark to # 3 as needed and if it has spark check compression? If plug is oil fouled , it may have other internal problem?

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