Air flow meter adjustment post??

Results 1 to 8 of 8
\r\n
\r\n
\r\n
\r\n \r\n
\r\n mmpete0131\r\n \r\n
\r\n mmpete0131 is offline\r\n\r\n \r\n
\r\n \r\n Member\r\n \r\n \r\n \r\n \r\n \r\n \r\n mmpete0131\'s Avatar\r\n \r\n \r\n \r\n
\r\n
\r\n
Join Date
Sep 2016
\r\n
Location
Richmond, VA
\r\n \r\n
Posts
57
\r\n \r\n
\r\n \r\n \r\n \r\n \r\n
\r\n
\r\n
\r\n \r\n \r\n

\r\n Air flow meter adjustment post??\r\n

\r\n \r\n\r\n\r\n \r\n \r\n
\r\n
\r\n
\r\n Hello everyone,
\r\nAbout 3 months ago I took my Supra on a long distance road trip and noted an intermittent check engine light which came on at highway speeds for 1-2 seconds. I found a post which described this issue exactly as a lean issue, and it had a link to a post from a guy named ’Wes’ who described how to adjust the AFM 2-3 clicks to allow the engine to run richer. Now, I cannot find this.
\r\nDoes anyone have this link? OR, can anyone remember exactly which way you are supposed to turn the dial in the AFM to allow for a more rich system? I can probably remember the rest...thanks in advance for your help!
\r\n
\r\nMike P
\r\n‘84 Supra P-type\r\n
\r\n
\r\n\r\n \r\n
\r\n
\r\n \r\n
\r\n
\r\n
\r\n
\r\n -' + '->\r\n
\r\n \r\n \r\n \r\n \r\n \r\n Reply With Quote Reply With Quote \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n\r\n \r\n \r\n \r\n \r\n\r\n \r\n \r\n\r\n \r\n \r\n \r\n \r\n \r\n \r\n -' + '->\r\n
\r\n
\r\n
\r\n\r\n'; pd[1312371] = '\r\n
  • \r\n\r\n\r\n
    \r\n \r\n \r\n \r\n #2\r\n \r\n \r\n \r\n \r\n
    \r\n
    \r\n
    \r\n
    \r\n \r\n
    \r\n supraz\r\n \r\n
    \r\n supraz is offline\r\n\r\n \r\n
    \r\n \r\n CelicaSupra.com Member\r\n \r\n \r\n \r\n \r\n \r\n \r\n supraz\'s Avatar\r\n \r\n \r\n \r\n
    \r\n
    \r\n
    Join Date
    Jun 2003
    \r\n
    Location
    Vancouver, BC Canada
    \r\n \r\n
    Posts
    869
    \r\n \r\n
    \r\n \r\n \r\n \r\n \r\n
    \r\n
    \r\n
    \r\n \r\n \r\n\r\n\r\n \r\n \r\n
    \r\n
    \r\n
    \r\n The Wes you are talking about is SupraWes, Wes Hetrick and he used to have his own site that had performance mods on it.
    \r\n
    \r\nhttp://tscperformance.com
    \r\nThis appears to be a dead link now.
    \r\n
    \r\nI think that trying this on your car is a band aid solution that will not really fix the issue. I think that you are experiencing a plugged gas filter in the tank or plugged injectors.
    \r\nDoing the mod may work, but it\'s covering up the cause of the problem. Unless your car has serious breathing mods there should not be any reason to modify the AFM.
    \r\n
    \r\nhttps://www.celicasupra.com/forums/s...t=#post1235817
    \r\n
    \r\nThis link leads to others that discuss the symptoms you are experiencing and also the AFM mod although there is no link to it directly.
    \r\n
    \r\nJust my 2 cents worth.
    \r\n
    \r\nDale\r\n
    \r\n
    \r\n\r\n \r\n
    \r\n
    \r\n \r\n
    \r\n \r\n \r\n \r\n \r\n
    Black 1983 P Type 5 Spd, Cloth Interior, BBK,HRE 17" Wheels, HKS Exhaust
    \r\nWhite 1984 P Type Auto, Leather Interior, Sunroof, Digital Dash
    \r\n \r\n \r\n
    \r\n \r\n
    \r\n
    \r\n
    \r\n
    \r\n -' + '->\r\n
    \r\n \r\n \r\n \r\n \r\n \r\n Reply With Quote Reply With Quote \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n\r\n \r\n \r\n \r\n \r\n\r\n \r\n \r\n\r\n \r\n \r\n \r\n \r\n \r\n \r\n -' + '->\r\n
    \r\n
    \r\n
    \r\n
  • \r\n'; pd[1312401] = '\r\n
  • \r\n\r\n\r\n
    \r\n \r\n \r\n \r\n #3\r\n \r\n \r\n \r\n \r\n
    \r\n
    \r\n
    \r\n
    \r\n \r\n
    \r\n Khlause\r\n \r\n
    \r\n Khlause is offline\r\n\r\n \r\n
    \r\n \r\n CelicaSupra.com Member\r\n \r\n \r\n \r\n \r\n \r\n \r\n Khlause\'s Avatar\r\n \r\n \r\n \r\n
    \r\n
    \r\n
    Join Date
    Jul 2012
    \r\n
    Location
    Tacoma
    \r\n \r\n
    Posts
    490
    \r\n \r\n
    \r\n \r\n \r\n \r\n \r\n
    \r\n
    \r\n
    \r\n \r\n \r\n\r\n\r\n \r\n \r\n
    \r\n
    \r\n
    \r\n
    \r\n
    \r\n
    \r\n
    \r\n \r\n
    \r\n Quote Originally Posted by supraz\r\n View Post\r\n
    \r\n
    The Wes you are talking about is SupraWes, Wes Hetrick and he used to have his own site that had performance mods on it.
    \r\n
    \r\nhttp://tscperformance.com
    \r\nThis appears to be a dead link now.
    \r\n
    \r\nI think that trying this on your car is a band aid solution that will not really fix the issue. I think that you are experiencing a plugged gas filter in the tank or plugged injectors.
    \r\nDoing the mod may work, but it\'s covering up the cause of the problem. Unless your car has serious breathing mods there should not be any reason to modify the AFM.
    \r\n
    \r\nhttps://www.celicasupra.com/forums/s...t=#post1235817
    \r\n
    \r\nThis link leads to others that discuss the symptoms you are experiencing and also the AFM mod although there is no link to it directly.
    \r\n
    \r\nJust my 2 cents worth.
    \r\n
    \r\nDale
    \r\n \r\n
    \r\n
    \r\n

    \r\nDale, here is a pseudo link for that dead website.
    \r\n
    \r\nYe old Wayback Machine is handy in these cases, I do not promise the whole website is workable, but you may be able to garner some info from the archived version.
    \r\n
    \r\nhttps://web.archive.org/web/20060613...rformance.com/\r\n
    \r\n
    \r\n\r\n \r\n
    \r\n
    \r\n \r\n
    \r\n
    \r\n
    \r\n
    \r\n -' + '->\r\n
    \r\n \r\n \r\n \r\n \r\n \r\n Reply With Quote Reply With Quote \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n\r\n \r\n \r\n \r\n \r\n\r\n \r\n \r\n\r\n \r\n \r\n \r\n \r\n \r\n \r\n -' + '->\r\n
    \r\n
    \r\n
    \r\n
  • \r\n'; pd[1312405] = '\r\n
  • \r\n\r\n\r\n
    \r\n \r\n \r\n \r\n #4\r\n \r\n \r\n \r\n \r\n
    \r\n
    \r\n
    \r\n
    \r\n \r\n
    \r\n mmpete0131\r\n \r\n
    \r\n mmpete0131 is offline\r\n\r\n \r\n
    \r\n \r\n Member\r\n \r\n \r\n \r\n \r\n \r\n \r\n mmpete0131\'s Avatar\r\n \r\n \r\n \r\n
    \r\n
    \r\n
    Join Date
    Sep 2016
    \r\n
    Location
    Richmond, VA
    \r\n \r\n
    Posts
    57
    \r\n \r\n
    \r\n \r\n \r\n \r\n \r\n
    \r\n
    \r\n
    \r\n \r\n \r\n\r\n\r\n \r\n \r\n
    \r\n
    \r\n
    \r\n GREAT info, everyone! I really appreciate the feedback and will look to replace o2 and fuel filter for now. I hear that job is a bear...\r\n
    \r\n
    \r\n\r\n \r\n
    \r\n
    \r\n \r\n
    \r\n
    \r\n
    \r\n
    \r\n -' + '->\r\n
    \r\n \r\n \r\n \r\n \r\n \r\n Reply With Quote Reply With Quote \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n\r\n \r\n \r\n \r\n \r\n\r\n \r\n \r\n\r\n \r\n \r\n \r\n \r\n \r\n \r\n -' + '->\r\n
    \r\n
    \r\n
    \r\n
  • \r\n'; pd[1312423] = '\r\n
  • \r\n\r\n\r\n
    \r\n \r\n \r\n \r\n #5\r\n \r\n \r\n \r\n \r\n
    \r\n
    \r\n
    \r\n
    \r\n \r\n
    \r\n ddd228\r\n \r\n
    \r\n ddd228 is offline\r\n\r\n \r\n
    \r\n \r\n CelicaSupra.com Member\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n ddd228\'s Avatar\r\n \r\n \r\n \r\n
    \r\n
    \r\n
    Join Date
    May 2005
    \r\n
    Location
    N. Seattle.
    \r\n \r\n
    Posts
    5,190
    \r\n \r\n
    \r\n \r\n \r\n \r\n \r\n
    \r\n
    \r\n
    \r\n \r\n \r\n\r\n\r\n \r\n \r\n
    \r\n
    \r\n
    \r\n
    \r\n
    \r\n
    \r\n
    \r\n \r\n
    \r\n Quote Originally Posted by mmpete0131\r\n View Post\r\n
    \r\n
    GREAT info, everyone! I really appreciate the feedback and will look to replace o2 and fuel filter for now. I hear that job is a bear...
    \r\n \r\n
    \r\n
    \r\n
    IT IS!!!!! i suggest removing the 2 engine mount bolts on drivers side and jack up the engine and stuff a 2 X 4 under it. Makes for less blood loss. A 17 MM FLARE crow foot is handy! Do the banjo bolts first,then the bracket.
    \n
    \nLean condition. HMMMM. An 02 sensor that is lazy usually goes RICH,not lean.
    \nCheck for vacuum leaks: throttle body,EGR,cruise control actuator and intake pipe and connections. Some times,the coolant temp sensor goes wacky and tells the engine that it is HOT and will lean out the mixture. In closed loop.
    \nhttp://www.cygnusx1.net/Supra/Library/TSRM/MK2/manual.aspx?Section=FI&P=8
    \n
    \nhttp://www.cygnusx1.net/Supra/Librar...ection=FI&P=72\r\n
    \r\n
    \r\n\r\n \r\n
    \r\n
    \r\n \r\n
    \r\n \r\n \r\n \r\n \r\n
    Dave in Seattle. I keep LATE hours.Hidden Content
    \r\n\'84 type "L" ,Auto ,daily driver. Dk blue.
    \r\n \r\n \r\n
    \r\n \r\n
    \r\n
    \r\n
    \r\n
    \r\n -' + '->\r\n
    \r\n \r\n \r\n \r\n \r\n \r\n Reply With Quote Reply With Quote \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n\r\n \r\n \r\n \r\n \r\n\r\n \r\n \r\n\r\n \r\n \r\n \r\n \r\n \r\n \r\n -' + '->\r\n
    \r\n
    \r\n
    \r\n
  • \r\n'; pd[1312375] = '\r\n
  • \r\n\r\n\r\n
    \r\n \r\n \r\n \r\n #6\r\n \r\n \r\n \r\n \r\n
    \r\n
    \r\n
    \r\n
    \r\n \r\n
    \r\n AJ\r\n \r\n
    \r\n AJ is offline\r\n\r\n \r\n
    \r\n \r\n CelicaSupra.com Member\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n AJ\'s Avatar\r\n \r\n \r\n \r\n
    \r\n
    \r\n
    Join Date
    Mar 2003
    \r\n
    Location
    SF Bay Area
    \r\n \r\n
    Posts
    7,300
    \r\n \r\n
    \r\n \r\n \r\n \r\n \r\n
    \r\n
    \r\n
    \r\n \r\n \r\n\r\n\r\n \r\n \r\n
    \r\n
    \r\n
    \r\n Mike, for an un moded MK2 the AFM adjustment really doesn\'t have any benefits...
    \n
    \nI would expect based on air temps, type of gas, amount of throttle and age of O2 sensor that the check engine light was due to engine knock aka pinging...
    \n
    \n
    \n2 solutions based on my experience...replace the O2 sensor and if still experiencing pinging pre-ignition knock etc etc add a octane boost...my \'86 was always exhibited these conditions in temps over 92F, hard on the throttle and or going up hill (or under a load) especially with the A/C on...
    \n
    \nPat Bradden in his books document the AFM mod, I run 2 clicks counter clockwise but I do so mods as well...\r\n
    \r\n
    \r\n\r\n \r\n
    \r\n
    \r\n \r\n
    \r\n \r\n \r\n \r\n \r\n
    Regards,
    \r\nArch
    \r\n\'86 Supra MA67
    \r\nBrullen 2.5" Exhaust, HKS Fly w/7MGE clutch,ST Springs, RC Intake & TB, 2.8GT & XX emblems, Factory Add on Rear Shoulder belts, Pioneer DEH-P2000 AM/FM/CD w/CDS-P5000 CD Player, Compomotive CXNs 8x16
    \r\n \r\n \r\n
    \r\n \r\n
    \r\n
    \r\n
    \r\n
    \r\n -' + '->\r\n
    \r\n \r\n \r\n \r\n \r\n \r\n Reply With Quote Reply With Quote \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n\r\n \r\n \r\n \r\n \r\n\r\n \r\n \r\n\r\n \r\n \r\n \r\n \r\n \r\n \r\n -' + '->\r\n
    \r\n
    \r\n
    \r\n
  • \r\n'; pd[1312385] = '\r\n
  • \r\n\r\n\r\n
    \r\n \r\n \r\n \r\n #7\r\n \r\n \r\n \r\n \r\n
    \r\n
    \r\n
    \r\n
    \r\n \r\n
    \r\n SupraFiend\r\n \r\n
    \r\n SupraFiend is offline\r\n\r\n \r\n
    \r\n \r\n CelicaSupra.com Member\r\n \r\n \r\n \r\n \r\n \r\n \r\n SupraFiend\'s Avatar\r\n \r\n \r\n \r\n
    \r\n
    \r\n
    Join Date
    Mar 2003
    \r\n
    Location
    Vancouver, BC
    \r\n \r\n
    Posts
    10,107
    \r\n \r\n
    \r\n \r\n \r\n \r\n \r\n
    \r\n
    \r\n
    \r\n \r\n \r\n\r\n\r\n \r\n \r\n
    \r\n
    \r\n
    \r\n I would not recommend modifying your AFM unless you are using a wideband data logger to compare before and after to see if you actually did anything useful. BTW, the AFM mod will not help steady state driving, you are in closed loop mode the ecu is mostly looking at the output of the o2 sensor to fuel. The code you are referencing is also common to get if you have an aftermarket header, particularly one like the Pacesetter where the o2 sensor isn\'t directly in the exhaust stream. If you don\'t have one, you probably just need a new o2 sensor as was mentioned, and a good tune up would be a good idea as well (check your air filter, plugs, cap and rotor).
    \r\n
    \r\nAlso contrary to popular belief, if there was benefit to be had by modifying your AFM to the mods on your car, you would actually want to tighten the spring to make the ECU put out less fuel, not more. These cars will run richer and richer and richer as you mod them, while you are experiencing a lean condition.\r\n
    \r\n
    \r\n\r\n \r\n
    \r\n
    \r\n \r\n
    \r\n \r\n \r\n \r\n \r\n
    Black 86 mk2 Project Car
    \r\nNew SDR 86 mk2 Daily User, Highway Cruiser AND Parking Lot Abuser in the works!
    \r\n \r\n \r\n
    \r\n \r\n
    \r\n
    \r\n
    \r\n
    \r\n -' + '->\r\n
    \r\n \r\n \r\n \r\n \r\n \r\n Reply With Quote Reply With Quote \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n\r\n \r\n \r\n \r\n \r\n\r\n \r\n \r\n\r\n \r\n \r\n \r\n \r\n \r\n \r\n -' + '->\r\n
    \r\n
    \r\n
    \r\n
  • \r\n'; pd[1312407] = '\r\n
  • \r\n\r\n\r\n
    \r\n \r\n \r\n \r\n #8\r\n \r\n \r\n \r\n \r\n
    \r\n
    \r\n
    \r\n
    \r\n \r\n
    \r\n pdupler\r\n \r\n
    \r\n pdupler is offline\r\n\r\n \r\n
    \r\n \r\n Founding Member\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n pdupler\'s Avatar\r\n \r\n \r\n \r\n
    \r\n
    \r\n
    Join Date
    Mar 2003
    \r\n
    Location
    Fort Worth, TX
    \r\n \r\n
    Posts
    6,142
    \r\n \r\n
    \r\n \r\n \r\n \r\n \r\n
    \r\n
    \r\n
    \r\n \r\n \r\n\r\n\r\n \r\n \r\n
    \r\n
    \r\n
    \r\n It had become very popular once upon a time back in the 90s as these cars were off warranty and had finally depreciated into the hands of wannabe racers who were game to try anything. Then as I started parting out Supras, people were looking for good, used AFMs, but nobody wanted one that had been tampered with or at least wouldn\'t pay much. I wound up with I think two that had been tampered. I tried plugging them in to see if they\'d work, but neither of them did and I think I sent them to the crusher with the last of the carcasses. People may be willing to take a chance and buy a tampered one now that the supply has dwindled, but I recommend don\'t even cut the darned thing open.\r\n
    \r\n
    \r\n\r\n \r\n
    \r\n
    \r\n \r\n
    \r\n \r\n \r\n \r\n \r\n
    Phil D.
    \r\n85 Silver 6m-gte, completed 2000
    \r\n
    \r\n"I always observe the speed limit. I see those DAMNED signs everywhere."
    \r\n \r\n \r\n
    \r\n \r\n
    \r\n
    \r\n
    \r\n
    \r\n -' + '->\r\n
    \r\n \r\n \r\n \r\n \r\n \r\n Reply With Quote Reply With Quote \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n\r\n \r\n \r\n \r\n \r\n\r\n \r\n \r\n\r\n \r\n \r\n \r\n \r\n \r\n \r\n -' + '->\r\n
    \r\n
    \r\n
    \r\n
  • \r\n'; // next/previous post info pn[1312369] = "1312407,1312371"; pn[0] = ",1312369"; pn[1312371] = "1312369,1312401"; pn[1312401] = "1312371,1312405"; pn[1312405] = "1312401,1312423"; pn[1312423] = "1312405,1312375"; pn[1312375] = "1312423,1312385"; pn[1312385] = "1312375,1312407"; pn[1312407] = "1312385,1312369"; // cached usernames pu[0] = guestphrase; pu[33089] = "mmpete0131"; pu[547] = "supraz"; pu[118] = "AJ"; pu[57] = "SupraFiend"; pu[17674] = "Khlause"; pu[55] = "pdupler"; pu[2729] = "ddd228"; // -->

    Threaded View

    Previous Post Previous Post   Next Post Next Post
    1. #1
      Member mmpete0131's Avatar
      Join Date
      Sep 2016
      Location
      Richmond, VA
      Posts
      57

      Air flow meter adjustment post??

      Hello everyone,
      About 3 months ago I took my Supra on a long distance road trip and noted an intermittent check engine light which came on at highway speeds for 1-2 seconds. I found a post which described this issue exactly as a lean issue, and it had a link to a post from a guy named ’Wes’ who described how to adjust the AFM 2-3 clicks to allow the engine to run richer. Now, I cannot find this.
      Does anyone have this link? OR, can anyone remember exactly which way you are supposed to turn the dial in the AFM to allow for a more rich system? I can probably remember the rest...thanks in advance for your help!

      Mike P
      ‘84 Supra P-type

    Thread Information

    Users Browsing this Thread

    There are currently 1 users browsing this thread. (0 members and 1 guests)

      Posting Permissions

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