Announcement

Collapse
No announcement yet.

Cranks, no spark, coil not firing.

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    Cranks, no spark, coil not firing.

    1985 Lincoln Town Car, EEC-IV, no mods....

    The coil has power to both wires in 'run' and 'start', but no spark outbound. Dizzy is turning.

    I've already swapped 3 JY modules, 2 JY coils and installed a complete new distributor.

    I did read past threads on this. Gadget mentions testing the 'I' terminal on the starter relay, and CP mentions power to the ignition box. CP also mentioned in the working on thread that it may have something to do with the ignition switch.

    I realise both coils could be bad. I've got a new one inbound, not a waste anyway. Heck all three modules could be bad for that matter.

    So, in light of the above, could it still be the fixes mentioned? Or does having power to both at all times mean it's something else?

    Need to get it fixed to get to SF!

    Pete
    Originally posted by gadget73
    For other types of inquiry, more information is required. Please press 4 to speak to a representative who can help you with your question. This call may be monitored for quality assurance purposes.


    2003 Grand Marquis Ultimate, the "Stealth Bomber": http://www.grandmarq.net/vb/showthre...-Grand-Marquis
    1991 S-10, 'Bulldog', 2.5l 5 speed: http://www.grandmarq.net/vb/showthre...375#post698375
    1985 Town Car, 'Faded Glory', gone but not forgotten. 84/87/91/97 MGMs too.

    #2
    have you tried manually grounding the coil to the battery and see if it fires then? if its a duraspark car ive heard of the ballast wire going and youll see power at the coil with the key on but when you try to start it it wont go cause of too much resistance in that wire

    Comment


      #3
      I'll try it! What's the ballast wire?

      Pete
      Originally posted by gadget73
      For other types of inquiry, more information is required. Please press 4 to speak to a representative who can help you with your question. This call may be monitored for quality assurance purposes.


      2003 Grand Marquis Ultimate, the "Stealth Bomber": http://www.grandmarq.net/vb/showthre...-Grand-Marquis
      1991 S-10, 'Bulldog', 2.5l 5 speed: http://www.grandmarq.net/vb/showthre...375#post698375
      1985 Town Car, 'Faded Glory', gone but not forgotten. 84/87/91/97 MGMs too.

      Comment


        #4
        Originally posted by Piece-it pete View Post
        I'll try it! What's the ballast wire?

        Pete
        First off, this is not Duraspark. And I do not believe there is a ballast wire. I'd be leaning towards the TFI module in the distributor, or the pickup inside the distributor. But since you've already tried that...


        As always, check your grounds. Especially the one on the negative battery cable. Does the fuel pump run? Check your connections to the coil, and to the TFI module.

        Comment


          #5
          check for trouble codes... then check the ignition switch, they are notorious for failing.
          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


            #6
            Do you have +12v at the coil while the engine is cranking? If so, there is no problem with the I terminal on the starter relay. If you have power with the key on, but not when cranking, then start chasing stuff from the relay out to wherever that ties in.

            Also, the obvious, but have you verified that the wires aren't broken right at the coil? I've seen those break inside the insulation right there at the crimp.
            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

            Comment


              #7
              Yeah, we already talked about the igntion switch briefly in WAYWO. Very important to make sure the ignition module is getting power whilst cranking before going blaming any other parts.
              2012 Mazda5 Touring | Finally working on the LTD again!

              Comment


                #8
                Originally posted by 1987cp View Post
                Yeah, we already talked about the igntion switch briefly in WAYWO. Very important to make sure the ignition module is getting power whilst cranking before going blaming any other parts.
                Well, here's a thought then, to check this, put the key in run, and jump the S and the Batt terminals on the starter solenoid, if the ignition switch is the issue, the car should start.

                Comment


                  #9
                  Many thanks for the advice. Still not running....

                  1st I checked power at the starter solenoid post I. Yep.

                  Checked the the fuel pump, which I hadn't 'cause it wasn't getting a spark. Silly me, the fuel pump relay is not getting trigger power! Fuel pump power in is fine.

                  So I ran to the parts store and got a continuity tester, checked the ignition switch, it tested fine.

                  My problem is - I really don't know what I'm doing Never really tracked down electrical problems before. Kinda interesting, but would be more so if the darn thing started!

                  I've got the ele & vac manual for it but am uncertain which way the power comes in. I'm looking at wire 361 R / fuel pump relay / wire 97 T/LG D (see attached). What should I do next?

                  Pete

                  eec4-1.pdf eec4-2.pdf
                  Originally posted by gadget73
                  For other types of inquiry, more information is required. Please press 4 to speak to a representative who can help you with your question. This call may be monitored for quality assurance purposes.


                  2003 Grand Marquis Ultimate, the "Stealth Bomber": http://www.grandmarq.net/vb/showthre...-Grand-Marquis
                  1991 S-10, 'Bulldog', 2.5l 5 speed: http://www.grandmarq.net/vb/showthre...375#post698375
                  1985 Town Car, 'Faded Glory', gone but not forgotten. 84/87/91/97 MGMs too.

                  Comment


                    #10
                    Whoops, forgot to mention - Key on engine off diagnostic test - no codes.

                    Pete
                    Originally posted by gadget73
                    For other types of inquiry, more information is required. Please press 4 to speak to a representative who can help you with your question. This call may be monitored for quality assurance purposes.


                    2003 Grand Marquis Ultimate, the "Stealth Bomber": http://www.grandmarq.net/vb/showthre...-Grand-Marquis
                    1991 S-10, 'Bulldog', 2.5l 5 speed: http://www.grandmarq.net/vb/showthre...375#post698375
                    1985 Town Car, 'Faded Glory', gone but not forgotten. 84/87/91/97 MGMs too.

                    Comment


                      #11
                      Did you check the computer ground at the negative battery terminal? If that fell off/rotted off or whatever, it won't run.

                      Comment


                        #12
                        Think of it this way, it's either a ground problem, or the EEC relay. Since the EEC relay supplies power to ALL of that stuff. And look where the EEC relay grounds to...

                        Comment


                          #13
                          I'm going to check that ground but it better be good - I just replaced that wire recently. Hmm, maybe I screwed it up...

                          The manual dosn't have the EEC relay location. Is that the relay next to the fuel pump relay?

                          Pete
                          Originally posted by gadget73
                          For other types of inquiry, more information is required. Please press 4 to speak to a representative who can help you with your question. This call may be monitored for quality assurance purposes.


                          2003 Grand Marquis Ultimate, the "Stealth Bomber": http://www.grandmarq.net/vb/showthre...-Grand-Marquis
                          1991 S-10, 'Bulldog', 2.5l 5 speed: http://www.grandmarq.net/vb/showthre...375#post698375
                          1985 Town Car, 'Faded Glory', gone but not forgotten. 84/87/91/97 MGMs too.

                          Comment


                            #14
                            That's where it lives in my car but it's a few years newer.
                            sigpic


                            - 1990 Ford LTD Crown Victoria P72 - the street boat - 5.0 liter EFI - Ported HO intake/TB, 90 TC shroud/overflow, Aero airbox/zip tube, Cobra camshaft, 19lb injectors, dual exhaust w/ Magnaflows, Cat/Smog & AC delete, 3G alternator, MOOG chassis parts & KYB cop shocks, 215/70r/15s on 95-97 Merc rims

                            - 2007 Ford Escape XLT - soccer mom lifted station wagon - 3.0 Duratec, auto, rear converter delete w/ Magnaflow dual exhaust

                            - 2008 Mercury Grand Marquis Ultimate Edition - Daily driver - 4.6 2 valve Mod motor, 4R75E, 2.73s. Bone stock

                            Comment


                              #15
                              Originally posted by Piece-it pete View Post
                              I'm going to check that ground but it better be good - I just replaced that wire recently. Hmm, maybe I screwed it up...

                              The manual dosn't have the EEC relay location. Is that the relay next to the fuel pump relay?

                              Pete
                              That's correct sir. The plug on the relay should be a brown color. Fuel pump is green.

                              Comment

                              Working...
                              X