Page 1 of 3 123 LastLast
Results 1 to 10 of 26

Thread: Trouble codes and chaos

  1. #1
    Join Date
    Jan 2018
    Location
    Clemmons, NC
    Posts
    36
    Feedback Score
    0

    Default Trouble codes and chaos

    Hello All. Stupid newby here to the TC. I just got a poorly running 1988 TC Auto. First few things I found was a leak at the turbo to exhaust pipe and the cat was plugged up. I cut the cat out and this seemed to help a bunch. No luck on fixing the minor leak yet. Put new plugs, cap, rotor, cleaned throttle body and IAC. Cleaned VAM with MAF cleaner and put on a cone filter to remove the stock airbox. Did a base idle reset and adjusted the TPS. Fired the car up and getting the following codes. Key Only: 88, 22,41, 65 and Engine on: 12, 22, 34, 41, 74 & 77. It revs better than it did before but it does backfire some. It has a hunting idle but I got it to 1000rpms. Engine shakes a bit and thinking it may have a vacuum leak somewhere but visual inspection looks good. The bad is I found a water leak running down the exhaust pipe and it leaked out past the passenger side front tire. Any ideas on that leak? Thanks

  2. #2
    Join Date
    Jan 2018
    Location
    Clemmons, NC
    Posts
    36
    Feedback Score
    0

    Default

    PS The car has been sitting for many years. Put 5 gallons of Premium as the tank was almost empty. I changed the fuel filter as well to be safe. Also found out it’s not the original engine so someone may not have connect everything correctly. My first indicator was the IAC has a straight plug in that looks like one from a SVO or NA Mustang. Also timing is set at 10 with the spout out.

  3. #3
    Join Date
    Oct 2004
    Location
    Southern Maryland
    Posts
    2,565
    Feedback Score
    0

    Default

    KOEO
    On demand code 88--Electric fan drive solenoid (in the IRCM) I think the fan should run for a short spurt during this test.

    There is a single pulse (or a code 10 if using a code reader) between the on demand codes and the memory codes.
    I am guessing where the break is. I think the 22 should have showed-up in both places.


    Memory code 22--MAP sensor out of spec.
    Memory code 41-- O2 sensor not switching. Lean indication.
    Memory code 65--System did not go into closed loop fuel control.

    KOER
    code 12--Self test could not reach fast idle RPM spec.
    code 22--MAP sensor out of spec.
    code 34--EGR flow too low.
    code 41--O2 sensor lean
    code 74--Brake on/off switch test failed.
    code 77--Goose test failed

    74 and 77 are dynamic response tests. When you get the single pulse (or a code 10 if using a code reader) during KOER you need to goose the gas momentarily to WOT, then push and release the brake.
    Last edited by softtouch; 01-22-2018 at 03:42 PM.

  4. #4
    Join Date
    Jan 2018
    Location
    Clemmons, NC
    Posts
    36
    Feedback Score
    0

    Default

    Thanks Softtouch. So I am assuming my next steps will be a new BARO sensor and clean my EGR valve? I tried to clean the valve, but I didn't have a big enough wrench at the time to get the line off the back. Also I think I read I need to check my O2 sensor wiring or it may just need a new one since the car has over 200k miles on it. Thanks!

  5. #5
    Join Date
    Oct 2004
    Location
    Southern Maryland
    Posts
    2,565
    Feedback Score
    0

    Default

    Quote Originally Posted by Biff Bastion View Post
    Thanks Softtouch. So I am assuming my next steps will be a new BARO sensor and clean my EGR valve? I tried to clean the valve, but I didn't have a big enough wrench at the time to get the line off the back. Also I think I read I need to check my O2 sensor wiring or it may just need a new one since the car has over 200k miles on it. Thanks!
    I think you may have responded before I finished editing my post.
    According to the EVTM, you should have a MAP sensor. Make sure the vacuum is hooked up. The EVTM shows it mounted behind the IRCM module.

  6. #6
    Join Date
    Jan 2018
    Location
    Clemmons, NC
    Posts
    36
    Feedback Score
    0

    Default

    Oh okay. All the reading I saw was saying that these cars didn't come with a MAP but only a BARO. When I can get back to the car I will check that. I remember seeing the module next to the VAM box, but cant remember if it had a hose on the end of it or not. Thank you!

  7. #7
    Join Date
    Oct 2004
    Location
    Southern Maryland
    Posts
    2,565
    Feedback Score
    0

    Default

    I would fix the map sensor problem first and see what codes are left after that.

  8. #8
    Join Date
    Oct 2004
    Location
    Southern Maryland
    Posts
    2,565
    Feedback Score
    0

    Default

    Quote Originally Posted by Biff Bastion View Post
    Oh okay. All the reading I saw was saying that these cars didn't come with a MAP but only a BARO. When I can get back to the car I will check that. I remember seeing the module next to the VAM box, but cant remember if it had a hose on the end of it or not. Thank you!
    I don't have a Turbo Coupe so I can only go by what I see in the EVTM.
    Since it has a vane air flow meter, you would think it would have a Baro meter instead of a MAP.

    Ok after some research.. The EVTMs for 83-87 Turbos say it is a Baro sensor.
    The 88 EVTM says MAP sensor. Typo in the 88EVTM??
    Last edited by softtouch; 01-22-2018 at 05:44 PM.

  9. #9
    Join Date
    Jan 2018
    Location
    Clemmons, NC
    Posts
    36
    Feedback Score
    0

    Default

    Well I tried a new Motorcraft BARO sensor that matched the original numbers on the car and still getting the same code 22. I changed out the FPR, EGR valve, spark plug wires, O2 sensor this go around. Now my IAC decided to stop working, but I think that is a wiring issue I have to fix since the previous owners hacked the end up. Now my codes I am getting are Key On 88, 22, 41....then engine running 34, 41, (74 and 77 but know we can kind of omit those). The positive is its less codes this time by 2.

  10. #10
    Join Date
    Jan 2018
    Location
    Clemmons, NC
    Posts
    36
    Feedback Score
    0

    Default

    Now this makes me wonder. This car I know had an engine swap in the past. I just saw this note under the Thunderbird code listing "While the BP has a port typical of a MAP sensor, this port is NOT hooked to any vacuum source, and simply is a atmosphere vent." I know mine is in fact connected to a vacuum hose. Can someone tell me on an 88 model should the line be kept open or plugged into vacuum? Thanks!

Posting Permissions

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