Powered by Team Mondor
Results 1 to 6 of 6

Thread: Big intermittent misfire, RPM reads 23000 rpm for a sec.

  1. #1
    Hobo restorer

    Join Date
    Jun 2011
    Location
    Moscow
    Posts
    59

    Thumbs down Big intermittent misfire, RPM reads 23000 rpm for a sec.

    Hi guys!

    I was trying to find out my misfire problem. Most of the times it occurs when the engine is warming up. But sometimes i get this misfire while waiting for traffic light (And sometimes it dies.)

    I was trying to tune my MAFT PRO with a laptop, satisfying Vf and smoothing the VE table and seen this strange peaks of RPM, thats when the misfire goes. It peaks to 23000 RPM!!! Sometimes to 8000, and even to 3000, but the car is just warming up parked. Of course the rpm stays the same, just the signal to ECU. Sooooo. My question is: Do You guys encountered something like this?

    It seems to me that the signal from igniter to ECU gets interrupted, multiplied maybe. Maybe its the wiring to MAFT PRO? But I always wire everything rock solid. And the fact that it is intermittent is against this theory.

    What do you think?
    Last edited by myastzo; December 7th, 2017 at 01:48 AM.

  2. #2
    Hobo restorer

    Join Date
    Jun 2011
    Location
    Moscow
    Posts
    59

    Default Re: Big intermittent misfire, RPM reads 23000 rpm for a sec.

    I can upload my Bin if it will help.

  3. #3
    87T Supra
    plaaya69's Avatar
    Join Date
    Nov 2006
    Location
    Lake County, IL
    Posts
    845

    Default Re: Big intermittent misfire, RPM reads 23000 rpm for a sec.

    There is a igniter mod where you add a ground to it so it provides a better signal which may help you here:

    http://www.supramania.com/forums/thr...er-Mod-Results
    2004 Lexus GS300 - daily diver
    1987 Toyota Supra Turbo - burgundy exterior w/gray interior the summer driver.
    1987 Toyota Supra Turbo - parted put
    1987 Toyota Supra N/A - Sold

    Some Pictures.
    http://www.supramania.com/forums/showthread.php?t=81005


  4. #4
    Hobo restorer

    Join Date
    Jun 2011
    Location
    Moscow
    Posts
    59

    Default Re: Big intermittent misfire, RPM reads 23000 rpm for a sec.

    I did it already, but thanks! Well I found out one of my points in VE table was 0, so i fixed it, will see tomorrow how it reacts... Strange shit...

  5. #5
    Hobo restorer

    Join Date
    Jun 2011
    Location
    Moscow
    Posts
    59

    Default Re: Big intermittent misfire, RPM reads 23000 rpm for a sec.

    Well, that didnt help.

  6. #6
    Hobo restorer

    Join Date
    Jun 2011
    Location
    Moscow
    Posts
    59

    Default Re: Big intermittent misfire, RPM reads 23000 rpm for a sec.

    Its the MAFT Pro wiring, cuz disconnecting it worked. The car idles just like a dream. If i could find the adapter from lexus AFM to K&N filter i could just remove MAFT for a whie. Nice toy, but i really starting to hate it.

Bookmarks

Posting Permissions

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