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Long Crank, Hard Start

Discussion in '4 Cylinder' started by Kredence, Oct 27, 2010.

  1. Oct 27, 2010 at 3:41 PM
    #1
    Kredence

    Kredence [OP] Well-Known Member

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    I'm hoping I didn't simply overlook this in my searches.

    My 2.4 has a tendency to need to crank over about 7-9 times before firing. Other times it makes it half a turn before coming alive.

    I'm guessing this is an issue with low fuel pressure at the time of engine starting. Is there a check valve on the pump or anything I should know of?

    The engine cranks fast as I'm using an Optima Red Top and 2g wires to supply power to the starter.

    Any insight or pointing me to a thread where this has already been hashed out would be appreciated.

    Justin
     
  2. Oct 27, 2010 at 3:43 PM
    #2
    jandrews

    jandrews Carolina Alliance Southwest Region Ambassador

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    Start with the obvious and easy shit: Run it by your local auto parts store and have the battery, alt, starter tested. If that all checks out normal, you're probably facing an issue with the fuel system or valvetrain.
     
  3. Oct 28, 2010 at 10:19 AM
    #3
    Kredence

    Kredence [OP] Well-Known Member

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    I stated that part already. The cranking speed is more than optimal. I've owned 7 Toyotas and rebuilt the engines on 4 (almost five when I finish my last Runner). I know what a slow crank sounds like. I don't have a gauge to test pressure with. Wires and plugs are good. Plugs all show identical carboning. She runs like a champ. Just has a delayed start some times.
     
  4. Oct 28, 2010 at 10:21 AM
    #4
    krimson

    krimson Nothin

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    Might be your crankshaft position censor. Long crank is a symptom of this part going out.
     
  5. Oct 28, 2010 at 4:30 PM
    #5
    Kredence

    Kredence [OP] Well-Known Member

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    I'll have to dig up the FSM. Didn't think of the Crank shaft sensor being an issue.

    I'm trying to borrow a friends fuel pressure gauge so I can see if the rail is bleeding down after shutoff.

    Thanks for the input so far!
     
  6. Feb 28, 2011 at 5:44 PM
    #6
    MrGrimm

    MrGrimm Mall Crawler

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    Was this issue ever figured out? My truck had a very hard time starting this morning. I turned the key and all I heard was a click. Took about 10 seconds to actually get the thing started. My voltage is sitting at an average of 13.4. I havent had a chance to get the starter or alternator checked out.
     
  7. Feb 28, 2011 at 10:15 PM
    #7
    Kredence

    Kredence [OP] Well-Known Member

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    I'm suffering from a bad check valve on the fuel pump. I've since installed a fuel pressure gauge and the fuel rail pressure bleeds off after the ignition is turned off.

    It sounds like you may have a bad starter or bad grounding wire.
     
  8. Mar 2, 2011 at 6:19 AM
    #8
    Slycoma

    Slycoma Member

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    I have a 2010 with 5500 miles and it took 7 or 8 times this morning before it would start. Not impressed. First Toyota I have ever had a problem with.
     
  9. Mar 2, 2011 at 7:41 AM
    #9
    Kredence

    Kredence [OP] Well-Known Member

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    Doesn't work on this one. The truck doesn't prime the rail until it gets a crank signal.

    I know exactly what your talking about though. I do that on my honda civic.
     
  10. Dec 20, 2013 at 2:23 PM
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    mmadej87

    mmadej87 Mayday

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    Reviving an old thread here.

    OP did the check valve replace fix your problem? i think i may be having the same problem on my 98 V6. It has a long crank initially, but if i turned off the engine then started it again within 2 or 3 minutes, then it starts up right away.

    Do you have a part number for the check valve or did you end up replacing the entire fuel pump?
     
  11. Aug 15, 2014 at 12:40 AM
    #11
    Horsewithnoname

    Horsewithnoname New Member

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    Did this ever get fixed? I'm having the problem with the fuel bleeding off. What I've done so far, After driving for about 20 minutes I took a pair of needle nose vise grips and pinched the fuel line at the regulator. Let it sit then removed the pliers and started it. I did this three times, once for an hour, two hours, and overnight. All three times it fired up immediately. So that removes my theory of the stuck open injector. Now I just have to figure out where it bleeding off at. Somewhere between the regulator and the pump. Any ideas? The motor is a fresh complete rebuild with about 750 miles and a new head. And 4 new toyota injectors.
     
  12. Aug 15, 2014 at 1:35 AM
    #12
    memario1214

    memario1214 Vivid Illumination Vendor

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    Yeah, I gots boost
    I have the same issue. I'm guessing fuel bleed off is my problem as well...
     
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