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Playing Whack-A-Mole wit the LTC

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    #1

    Playing Whack-A-Mole wit the LTC

    OK SO I installed a new EGR valve position sensor and EVP (EGR Solenoid)

    Before I did this I cleared the code, Pulled the wire while key was on (but not running)

    It had 11 code then 34

    Now, after I changed the parts I have three codes

    94 Something to do with the air system
    74 Brake pedal depressed (don't remember pressing it)
    and 34 (came back)

    With the key on engine running these codes came up

    WITH THE KEY ON ENGINE OFF, only 34 comes on

    The valve TO the EGR was ok, When I pulled the vacuum direct to the EGR valve, car stumbled to a stall

    I pulled A vacuum to the Red and Green lines to the solenoid and they didn't hold the vacuum

    I didn't re-check the vacuum system with my pump since it started pouring

    But I am surprised now!!
    "To Find yourself, you must first lose yourself"

    -1973 Volkswagen Bus Westy
    -1986 Honda Magna 700cc
    -1989 Lincoln Town car Signature Series
    -2011 Subaru Outback
    Tags: None
    #2
    it won't do anything if you pull vacuum on the red line. It connects to the intake on the other end. Basically you're just sucking on a straw thats open at one end.

    the green line must hold vacuum. If it doesn't, you'll get the code 34.

    74 is from not stepping on the brake pedal. Ignore this.

    94 is thermactor air injection. If you have the red line unhooked during the test, or if there is a leak in that line, it might cause this. All of that stuff runs on a common line from the engine. Without solid engine vacuum, none of the smog stuff works. I got rid of my plastic lines years ago. They were all falling apart, and it leaked at the connector. Rubber lines with colored zip ties to identify things works better for me.
    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC grandpa spec white and cranberry

    1984 Lincoln Continental TurboDiesel - rolls coal

    Originally posted by phayzer5
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

    Everything looks like voodoo if you don't understand how it works

    Comment

      #3
      I might have to do that (replace the vacuum lines. So, in lieu of the plastic lines, what size rubber hoses should I get.

      I will investigate to see what is going on

      Just to make sure were on the same page, I put a vaccum on the red/green hoses going to the solenoid...not the Intake/ EGR valve
      "To Find yourself, you must first lose yourself"

      -1973 Volkswagen Bus Westy
      -1986 Honda Magna 700cc
      -1989 Lincoln Town car Signature Series
      -2011 Subaru Outback

      Comment

        #4
        correct, the green hose that goes from the solenoid to the EGR valve. It has to be connected to the EGR valve end.

        dont remember what size it is. Take a part to the store and match it. Use something that fits snugly so it won't fall off or leak.
        86 Lincoln Town Car (Galactica).
        5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

        91 Lincoln Mark VII LSC grandpa spec white and cranberry

        1984 Lincoln Continental TurboDiesel - rolls coal

        Originally posted by phayzer5
        I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

        Everything looks like voodoo if you don't understand how it works

        Comment

          #5
          no no, what I am saying is I unhooked the green and red line (separately from the valve and intake respectively)

          After then I hook the vacuum pump to theopen end (Valve/intake side) and put a vacuum to the solenoid side and I had no vacuum, I did on the egr valve
          "To Find yourself, you must first lose yourself"

          -1973 Volkswagen Bus Westy
          -1986 Honda Magna 700cc
          -1989 Lincoln Town car Signature Series
          -2011 Subaru Outback

          Comment

            #6
            I've had the same problem with my car. I replaced all the vacuum lines and replaced the EVR. Still get he code. EGR tested okay and vacuum lines seemed to be working as they should. I bypassed the AIR stuff that the red line also supplies vacuum to.

            My fuel economy has been good and the car seems to run okay so I gave up on looking for now. I'm ganna follow this thread to see if maybe I missed something...

            '78 LTD | '87 Grand Marquis | '89 Crown Vic (RIP) | '91 Grand Marquis (RIP) | '94 Town Car (RIP) | '97 Town Car (RIP)

            Comment

              #7
              Originally posted by porschpow View Post
              OK SO I installed a new EGR valve position sensor and EVP (EGR Solenoid)

              Before I did this I cleared the code, Pulled the wire while key was on (but not running)

              It had 11 code then 34

              Now, after I changed the parts I have three codes

              94 Something to do with the air system
              74 Brake pedal depressed (don't remember pressing it)
              and 34 (came back)

              With the key on engine running these codes came up

              WITH THE KEY ON ENGINE OFF, only 34 comes on

              The valve TO the EGR was ok, When I pulled the vacuum direct to the EGR valve, car stumbled to a stall

              I pulled A vacuum to the Red and Green lines to the solenoid and they didn't hold the vacuum

              I didn't re-check the vacuum system with my pump since it started pouring

              But I am surprised now!!
              I am confused... the EVP is the EGR valve position sensor, it is mounted directly on the EGR valve and has the green vacuum hose going to it.

              The EVR is the EGR valve vacuum regulator solenoid, which his mounted on the passenger inner fender. basically a black plastic solenoid with 2 vacuum hoses and a 2 wire electrical connection.

              Are these the parts you replaced?

              Code 94 is for the air injection system not working and is usually caused be a vacuum leak. Check the vacuum harness on the passenger side of the engine compartment for cracked vacuum line. also check vacuum connections at the diverter valve on the passenger side exhaust and under the AC compressor, on the back of the air pump.
              Last edited by 88grandmarq; 07-04-2014, 11:09 AM.
              2003 Town Car Signature - 3.27 RAR, Dual exhaust and J-mod - SOLD 9/2011
              89 Crown Victoria LX HPP -- SOLD 9/2010
              88 Grand Marquis LS - The Original -- Totaled 5/2006

              I rebuild AOD/AODE/4R70W/4R75E transmissions....Check out my Facebook page: https://www.facebook.com/pages/North...48414635312478

              Comment

                #8
                Yes, I did replace both of those.

                Originally posted by 88grandmarq View Post
                I am confused... the EVP is the EGR valve position sensor, it is mounted directly on the EGR valve and has the green vacuum hose going to it.

                The EVR is the EGR valve vacuum regulator solenoid, which his mounted on the passenger inner fender. basically a black plastic solenoid with 2 vacuum hoses and a 2 wire electrical connection.

                Are these the parts you replaced?

                Code 94 is for the air injection system not working and is usually caused be a vacuum leak. Check the vacuum harness on the passenger side of the engine compartment for cracked vacuum line. also check vacuum connections at the diverter valve on the passenger side exhaust and under the AC compressor, on the back of the air pump.
                Where would the lines fail in the harness??

                Where do I find this diverter valve under the compressor
                "To Find yourself, you must first lose yourself"

                -1973 Volkswagen Bus Westy
                -1986 Honda Magna 700cc
                -1989 Lincoln Town car Signature Series
                -2011 Subaru Outback

                Comment

                  #9
                  I couldn't find the diverter valve, but I changed the Egr valve (it hold vacuum), solenoid and the green and red hose holds a vacuum.

                  I cleared the codes and now with key on engine off , I got code 1 1, over and over. Which means everythign is ok

                  But when I do key on engine on, heres is where the weirdness happens:

                  It first blinks four times than engine idles higher, goes back down hen up again then down after a while.

                  It gives me the code 94 and 74 at least twice!

                  WHAT GIVES?!?!?!?!??!
                  "To Find yourself, you must first lose yourself"

                  -1973 Volkswagen Bus Westy
                  -1986 Honda Magna 700cc
                  -1989 Lincoln Town car Signature Series
                  -2011 Subaru Outback

                  Comment

                    #10
                    94 is "Air Injection is inoperative" so perhaps the smog pump or one of it's "parts" (like a vacuum hose) is faulty. 74 will ask if you depressed the brake after the start of the test. Don't think you need to worry about that one. If you still have emissions testing you may have to deal with the "94" code.


                    "Hope and dignity are two things NO ONE can take away from you - you have to relinquish them on your own" Miamibob

                    "NEVER trade your passion for glory"!! Sal "the Bard" (Dear Old Dad!)

                    "Cars are for driving - PERIOD! I DON'T TEXT, TWEET OR TWERK!!!!"

                    Comment

                      #11
                      so, the lines in the egr system, lines in the smog pump system and/or the smog pump egr itself is faulty. Is there a schematic of these systems????
                      "To Find yourself, you must first lose yourself"

                      -1973 Volkswagen Bus Westy
                      -1986 Honda Magna 700cc
                      -1989 Lincoln Town car Signature Series
                      -2011 Subaru Outback

                      Comment

                        #12
                        Someone here probably has a ETVM schematic they can post or at least a link. Wouldn't hurt, if you are keeping the car, to get one (possibly from EBAY??).


                        "Hope and dignity are two things NO ONE can take away from you - you have to relinquish them on your own" Miamibob

                        "NEVER trade your passion for glory"!! Sal "the Bard" (Dear Old Dad!)

                        "Cars are for driving - PERIOD! I DON'T TEXT, TWEET OR TWERK!!!!"

                        Comment

                          #13
                          I have an '89 EVTM that I can scan and send to you. Just let me know what pages you need.

                          1989 Lincoln Town Car Signature Series | 249k miles, current project car
                          2018 BMW 430i xDrive M-Sport | 50k miles
                          2018 Toyota Tacoma TRD Sport | 97k miles

                          Comment

                            #14
                            Awesome! Just to troubleshoot the issue with dcode 94.

                            So EGR system and Smog system. Im new to all this, so I am probably not addressing this right. This is just so freaking ridiculous!
                            "To Find yourself, you must first lose yourself"

                            -1973 Volkswagen Bus Westy
                            -1986 Honda Magna 700cc
                            -1989 Lincoln Town car Signature Series
                            -2011 Subaru Outback

                            Comment

                              #15
                              The plumbing diagram for all of that is on a sticker under the hood of the car.
                              86 Lincoln Town Car (Galactica).
                              5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

                              91 Lincoln Mark VII LSC grandpa spec white and cranberry

                              1984 Lincoln Continental TurboDiesel - rolls coal

                              Originally posted by phayzer5
                              I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

                              Everything looks like voodoo if you don't understand how it works

                              Comment

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