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On and off knocking at idle.

Discussion in 'Stock 1991 - 1994 Explorers' started by Braydon, April 17, 2011.

^^Searches ExplorerForum.com^^





  1. Braydon

    Braydon New Member

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    City, State:
    West Haven, Utah
    Year, Model & Trim Level:
    93 xlt
    Hey, I've got a recently acquired 93 explorer xlt and at idle there is a knock that is on for a few seconds then goes completely away for a few seconds, and then back on again. The guy that owned it before said it was a sticky valve, but i dont understand how it could knock one second and be silent the next. Im planning to run some injector cleaner through it the next week sometime. do you think it would fix it?
     
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  3. Sams01XplrSprt

    Sams01XplrSprt Southern Cali Explorer

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    welcome braydon
     
  4. 88redneck

    88redneck New Member

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    2002 ford explorer sport
    My truck does that too i was told that was the a/c
     
  5. TonkaRanger3.0

    TonkaRanger3.0 New Member

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    Year, Model & Trim Level:
    1993 Ford Ranger XLT 4.0
    i have a '93 4.0 ranger it ticks and goes away i believe its lifter tick caused by a failing lifter
     
  6. sanseven

    sanseven New Member

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    not sure, go for some professional
     
  7. 88redneck

    88redneck New Member

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    I agree my last car was a ford zx2 and it had a taping sound and and when i took it in they said it need a valve job new cams and the head need to be shaved. and found out later it had a small hole in the fourth piston, so I traded it and got me a exploder.
     
  8. BrooklynBay

    BrooklynBay Moderator & long time member. Staff Member Moderator Elite Explorer

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  9. BrianDye

    BrianDye I'll have another...

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    Is it a knock or a tick? If its a ticking, its most likely the lifters. VERY common on first gens.
     
  10. Braydon

    Braydon New Member

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    Its a ticking noise. So I think a valve is sticking. I ran some gumout through it this tank of gas and its at a quarter tank now. I think it helped alittle. I also plan to do seafoam in about a month and a half.
     
  11. 1995 Explorer

    1995 Explorer New Member

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    I get a little ticking at cold start, however, this problem goes away once the the truck warms up. Are you sure that the IAC valve is not sticking at starting at startup?
     
  12. westfield

    westfield Active Member

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    94 Eddie Bauer
    If we all took this advice we would not need this board !

    Anyway, mine does not knock but I do get some what seems to be valve ticking and goes away in a few seconds.

    If it is a rod knock, it doesl not go away, does it ?
     
  13. SwaintaN

    SwaintaN Well-Known Member

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    lifter trick.. mine does it.. been diagnosed.. just a lifter
     
  14. SwaintaN

    SwaintaN Well-Known Member

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    i rod can knock if your spun a bearing.. if you spun a bearing your looking at expensive repairs..
     
  15. zachsellers

    zachsellers New Member

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    City, State:
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    hey

    Hey man Im also new to this but my 1993 limited has a slight tick when i first start it and its cold. Yeah mine tend to go away after its warms up! L:exp:ifters?
     
  16. Braydon

    Braydon New Member

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    City, State:
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    thanks for the advice. im pretty sure its just a lifter tick. and it does seem to be less when its warm.
     

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