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4.7 Slow Crank, no start?

Discussion in '4th Gen 4Runners (2003-2009)' started by 4-rizzle, Aug 1, 2019.

  1. Aug 1, 2019 at 9:52 AM
    #1
    4-rizzle

    4-rizzle [OP] New Member

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    2003 4.7 with slow crank, but no start. The battery is like new on the truck and all electronics work as usual, so I’ve ruled the battery out. Anyone know why it would crank really slow and not start?
     
  2. Aug 1, 2019 at 10:14 AM
    #2
    MattAK

    MattAK Headin' for the hills

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    Welcome to the forum. just some basics: check the battery connections. make sure they're nice and tight, clean them if there's any corrosion. I've seen the tiniest amount of corrosion prevent a start even though everything else works. if the battery terminals or clamps are damaged or chewed up get them replaced. Check the cables going from the battery to the starter, see if a rodent chewed on something or anything looks compromised. last resort is to pull the starter and have it tested, it's a PITA since it's on top of the engine under the intake manifold.
     
  3. Aug 1, 2019 at 10:14 AM
    #3
    jester243

    jester243 rabble rabble rabble

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    I changed some lights, tires and tinted windows...mind blowing huh
    2 things, starters can have internal binding with age and that increases difficulty turning. the other is that batteries can seem to be like new but when fail when under a load. I would have the battery load tested, and if you can get it going have the started checked to see how much it is trying to draw. Good luck hope its a quick fix.
     
  4. Aug 1, 2019 at 11:43 AM
    #4
    Dillusion

    Dillusion New Member

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    Electronic working like normal doesn't mean the battery has the cranking power.

    I'd start there.
     
  5. Aug 1, 2019 at 2:47 PM
    #5
    captsolo

    captsolo New Member

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    nassau bahamas
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    How old is the starter?

    I have three starters on my three 2005 F225 Yamaha outboards (14 years old), and the starters never failed on any of them.

    In fact, I started two of them an hour ago.

    On the other hand, my 2005 Toyota 4runner eats up new starters, and I replaced 4 of them including the original OEM which lasted 5 years.

    Had that starter rebuilt, and it failed a year later.

    Replaced that with AM new starter - lasted another 5 years.

    Replaced that one a few years ago with a new Quality Built (lifetime warrantee); and purchased another AM new Amazon.com starter for $87 when the "Quality" in there now fails.

    Only thing on those 4runners that fails (so far!).

    Oops! AC compressor one time failure too. Replaced AC with $200 OEM Denso from Amazon. Cools like the original Denso compressor.

    BTW: an old "long" hotwire (or ground) that goes to a starter can make a starter turn over slowly and not start like yours is doing. Might want to replace them wires (with a new AM starter from Amazon).

    A 10 year old, worn out hotwire (the fat thick red one) on the battery can keep a starter from turning over (i.e., slowly).
     
    Last edited: Aug 2, 2019

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