Page 1 of 2 1 2 LastLast
Results 1 to 10 of 15

Thread: 20v running issues

  1. #1
    Junior Member
    Join Date
    Mar 2013
    Name
    Gerard
    State
    Qld
    Location
    Jindalee
    Country
    Australia
    Posts
    6

    Default 20v running issues


    TO REMOVE ADS, PLEASE
    REGISTER OR SIGN IN
    G'day guys" I'm looking for a bit of advice, I got a silver top 20 valve with some running issues.
    First off this conversion was done some time ago (15000 klms) and up to now has had no issues, so it is all wired correctly. Currently it's chugging black smoke ( over fuelling) and generally lacking in power. The idle control valve is clicking rapidly and continuously yet it idles ok. When I turn on the ignition the engine check light comes on as usual, then when I hit the starter button the light goes out while its cranking, it takes about 10 seconds of cranking then the check engine light will come back on and the engine starts soon after. The ecu is not showing any error codes. Thanks in advance for any help.
    ps this is running the factory ecu

  • #2
    Veteran Skylar's Avatar
    Join Date
    Mar 2009
    Name
    Ken
    State
    WA
    Location
    Perth
    Country
    Australia
    Posts
    1,370

    Default

    Check the afm. Make sure plugs aren't fouled.

    Is it dizzy relocation, spark splitter or standalone + COP?

  • #3
    Junior Member
    Join Date
    Mar 2013
    Name
    Gerard
    State
    Qld
    Location
    Jindalee
    Country
    Australia
    Posts
    6

    Default

    Quote Originally Posted by Skylar View Post
    Check the afm. Make sure plugs aren't fouled.

    Is it dizzy relocation, spark splitter or standalone + COP?
    Thanks for the suggestions,
    The ignition is completely standard, dizzy in original spot.
    engine stalls when I disconnect the afm so I assume its working????
    plugs are new.

  • #4
    Moderator dove grey 64's Avatar
    Join Date
    Aug 2010
    Name
    Geoff
    State
    VIC
    Location
    mt dandenong
    Country
    Australia
    Posts
    2,444

    Default

    Checked over fuel rail and fuel pressure regulator?

  • #5
    Member
    Join Date
    Mar 2011
    Name
    Ced
    State
    VIC
    Location
    Rowville
    Country
    Australia
    Posts
    80

    Default

    Check the fuel injectors. They may be damaged, causing your engine to be over flooded with fuel.

  • #6
    Veteran Skylar's Avatar
    Join Date
    Mar 2009
    Name
    Ken
    State
    WA
    Location
    Perth
    Country
    Australia
    Posts
    1,370

    Default

    When I say check the afm, I mean refer to manual and check the afm using fsm procedure. It could be the afm reading a lot higher than what it should be but still reading something. In that case unplugging it will make a huge difference to the operating point on the fuel and ignition maps. My experience with afm engines is that when you unplug the afm, it will mostly stall out. Start the car back up without the afm and see if it makes a difference to the idle.

    You checked for air leaks? Like big ones that might be letting all the air bypass the afm making the ecu disregard the afm signal?

  • #7
    Junior Member
    Join Date
    Mar 2013
    Name
    Gerard
    State
    Qld
    Location
    Jindalee
    Country
    Australia
    Posts
    6

    Default

    Ok sorry for the misunderstanding ill check it as described. The engine will not start however with the afm disconected.

  • #8
    Veteran Skylar's Avatar
    Join Date
    Mar 2009
    Name
    Ken
    State
    WA
    Location
    Perth
    Country
    Australia
    Posts
    1,370

    Default

    Hmm, ok. Nissans will start and idle without afm and it idles rock solid without an afm. Which is an easy check I use for nissans, doesn't seem to work on toyotas.

  • #9
    Noooob
    Join Date
    Jun 2010
    Name
    Matt
    State
    NSW
    Location
    Campbelltown
    Country
    Australia
    Posts
    5,225

    Default

    Work out what the code is, done by bridging the te and e1 pins in the diag box.
    Ae86 Drivingclub - Toyota AE86 Car Club where AE86 | KE70 | Toyota 86 / GT86 | Subaru BRZ | Scion FRS owners

  • #10
    Junior Member
    Join Date
    Mar 2013
    Name
    Gerard
    State
    Qld
    Location
    Jindalee
    Country
    Australia
    Posts
    6

    Default


    TO REMOVE ADS, PLEASE
    REGISTER OR SIGN IN
    Thanks for your replies guys, here's what i found today.
    burnt tracks in the ecu circuit board and leaking capacitors as well.
    one of the burnt tracks goes to G2 pin which i think is for the crank angle sensor input {correct me if i'm wrong}
    another goes to a pin labelled EC and then the third letter is not legible, any guesses for that one.?
    I have tried to post some pics of it but for some reason it won't work.
    seems logical that this damage to the ecu could be causing the running problems?? right?
    On the bright side it does seem like a good excuse to go out and buy an aftermarket ecu.

  • Page 1 of 2 1 2 LastLast

    Similar Threads

    1. 4age 20v issues
      By ryebred_06 in forum Technical - Questions
      Replies: 3
      Last Post: 27th November 2012, 09:11 PM
    2. 4AC Sprinter running issues
      By Vernau in forum Technical - Questions
      Replies: 5
      Last Post: 2nd June 2011, 08:23 PM
    3. 20v Issues :(
      By sonsta in forum Technical - Questions
      Replies: 10
      Last Post: 21st April 2009, 02:47 PM
    4. 20v Issues
      By sonsta in forum Technical - Questions
      Replies: 8
      Last Post: 25th December 2008, 12:16 AM
    5. 20v issues
      By Selk in forum Technical - Questions
      Replies: 2
      Last Post: 8th September 2006, 08:51 PM

    Posting Permissions

    • You may not post new threads
    • You may not post replies
    • You may not post attachments
    • You may not edit your posts
    •