Pinging... Finally Gone !!!

Discussion in '1994 - 1995 Specific Tech' started by MLC Stang, Jul 9, 2003.


  1. jetuomi

    jetuomi Founding Member

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    hey, you're absolutely right its the heads, there is a theory on how efficient the head is translates into how much timing it can run.. as carbon builds up on the valves, increases compression and you have to reduce timing/increase fuel octane..

    my new heads (ported edelbrock aluminum) can run 16* timing on a J4J1 program with 87 octane and no pinging yet.. crazy !
    #41
  2. sixty9boss302

    sixty9boss302 Founding Member

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    My car was pinging at anything above 9* so I replaced the ACT sensor and it did nothing. Today at the track I had the timing at 8* and it still pinged at 5 grand. Theres some really helpfull info in this tread but my problem is all while its like 65* outside so maybe my problem is different that you guys with the high temp pinging. Would changing the ECT sensor possibly help? Any suggestions?
    #42
  3. Slow5.0

    Slow5.0 New Member

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    When I had rebuild my heads(new springs ,retainers,sleves,keepers ect. ,my mechanif use little hammer to hit top of valves a few times ( compression air was in chambers) so this can clean valve seats and stop pinging , I think
    #43
  4. GTPhreak

    GTPhreak Founding Member

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    I cleaned my MAF sensor the other day and this seemed to help tremendously with my ping issue. before i would ping on anything less than 93 with 12* timing, dropped to 89 for a couple tanks and it would ping on occassion, cleaned the maf, and no more ping, even driving hard on some warmer days ~80. dropped to 87 this last tank will see what happens
    #44
  5. sixty9boss302

    sixty9boss302 Founding Member

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    Everyone should keep eachother updated on their experiences with pinging. Could a vacume leak say around the PCV valve cause pinging?
    #45
  6. 1slow95

    1slow95 Founding Member

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    My car started pinging last summer. I ran 91 and some octane boost and that helped but it started again when I stopped running octane booster. On a couple of the nice days over winter when I drove it I noticed it was still pinging only at 4K-4.5K+ rpms. After I saw this thread a couple weeks ago I changed my ACT($15 at Advance Auto)...Havn't had a problem since :D. Still running 16* timing and 91 with no octane boost :nice:.


    Now my 4.0L 94 Explorer....thats another story..Almost constant pinging :notnice:. I've been using 87 octane because its not much better with 89...havn't tried 91 or any octane boost....Any suggestions?
    #46
  7. mustang20010

    mustang20010 Member

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    "Are there equivalent part numbers for my 91?"




    Well I happen to be at work right now so I'll help you out on that.

    for a 91 5.0 your numbers are:
    ACT Sensor: F2DZ-12A697-A
    ECT Sensor: F2AZ-12A648-A (same as 94-95s)

    Prices are about the same. It sure is great getting to buy them with my discount, I'm only paying around $24 each!
    #47
  8. jmuva44

    jmuva44 Founding Member

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    Just go to your auto parts store and they will be able to give you what you are looking for. All they need is your year/make/model/style
    #48
  9. Silver85TC

    Silver85TC New Member

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    This thread is just too applicable to all 94/95 5.0 l owners.......so.........

    Bumpity Bump!

    TTT
    #49
  10. jmuva44

    jmuva44 Founding Member

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    This thread helped me with my '95. Changed the ECT and pinging was gone. My '94 however is not being as easy. ECT and the ACT did not help.
    #50
  11. mo_dingo

    mo_dingo Well-Known Member

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    Same here. I have changed the ECT/IAT/TPS/IAC/Fuel Filter/Cleaned MAF & Air filter/ran 2 cans of Sea Foam/etc.

    Still ping on 10* timing at 91 octane in 2/3/4 gear after 3500 rpm's.

    Fuel pressure is 28 w/ vacuum & 36 w/o vacuum.

    So, I am completely lost. I am going to try a new MAF just for the hell of it, seeing as I have replaced everything else.

    If a new MAF doesn't do the trick, then I might try to get my cc's "professionally cleaned". Everything else is right in spec.
    Scott
    #51
  12. Slow5.0

    Slow5.0 New Member

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    Two days ago I swap my staock heads for used TW heads , I cleaned those heads befor installation , right now it pinging like mofo, I cleane neww PRO-M 75mm MASS and ACT but still nothing, problem wasnt in cc because my is clean, broblem could me lean condition or something like that
    #52
  13. beauzeau

    beauzeau New Member

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    Pinging

    Thanks to the guy who wrote in detail some diagnostics and his trials/errors.

    I just changed my ACT sensor and for now appears to have cleared up most of the pinging. I may have to try a tank full of 93 octane to see if it totally clears up. WOT appears alot quieter now, with the slightest hint of a ping.



    Hats off to you man !
    #53
  14. smokin91'

    smokin91' New Member

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    My 91 used to ping at WOT in 2nd/3rd gear. Then I did the MAF swap from a 94/95, had the flange machined off so it fit in my car and the pinging was gone and the throttle response was alot better. the MAF from 87-93 SUCKS!
    #54

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