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    #1

    Idling weird

    mobydick
    Rookie

    Registered: 09/19/12
    Posts: 85
    Loc: VA

    90 wagon. Idles like crap when it's in drive, at a stop light etc. Clears up if you pop it in neutral or park. More prevelant when it's warm. Thoughts? TFI going bad maybe? Kind of idles like it's got a cam in it. Real lumpy. Rocks the car at times.

    Did a code scan. Passed the key off test. Got codes 91, 41, 63, 33 in the memory. Got codes 44, 33 during the running test. Passed the cylinder balance test 3x. Haven't done a wiggle test yet.
    Tags: None
    #2
    Here's the list of codes...

    Ford OBD/OBD2 Codes – TroubleCodes.net
    http://www.troublecodes.net/ford/


    "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

      #3
      Take care of 44, 33, and 63, the rest may fall into line once those are taken care of.
      IAC, EGR, and TPS need attention. IAC you might get away with just cleaning it, TPS can be tested with a multimeter and you may find that it needs replacement, EGR may also need replacement. At least that's what I did w/my EGR when I had code 33, but I had a spare in the trunk so it wasn't a big deal.

      EGR discussion:
      http://www.grandmarq.net/vb/showthre...lve-bench-test

      TPS discussion:
      http://www.grandmarq.net/vb/showthre...ltage-readings

      IAC discussion:
      http://www.grandmarq.net/vb/showthre...r-erratic-idle
      Last edited by VicCrownVic; 04-07-2014, 11:58 PM.
      Vic

      ~ 1989 MGM LS Colony Park - Large Marge
      ~ 1998 MGM LS - new DD
      ~ 1991 MGM LS "The Scab"
      ~ 1991 MGM GS "The Ice Car"

      Comment

        #4
        Iac is a new Delphi unit. I just re-cleaned the throttle body again for good measure.

        TPS is brand new and calibrated for 1 volt at idle.

        Egr valve, valve position sensor and control solenoid are about a year old. Could they be bad already?

        Comment

          #5
          Stupid question, but what does evr and pve stand for?

          Comment

            #6
            Originally posted by mobydick View Post
            Stupid question, but what does evr and pve stand for?
            Not sure what pve is. Did you mean PCV?
            PCV = Positive Crankcase Ventilation

            EGR = Exhaust Gas Recirculation


            '93 T-bird
            '03 Silverado ECSB

            Missed:
            '88 Mark VII
            '86 CV

            Comment

              #7
              EVR - EGR Vacuum Regulator
              Not sure on PVE, the only other thread I could find that abbreviation in was indicated by the poster that he wasn't quite sure of the correct term so he may have meant PCV. (http://www.grandmarq.net/vb/showthre...l=1#post112290)

              It is possible new parts could be bad within a year, but that's not usually likely.

              The links I posted before I basically just glanced through, I figured they might just be a starting point. Looking at the EGR one again it looks to be more about older style EGRs which apparently can't be tested the same way as the newer style, but it looked like the idea on how to test the newer style is in there.
              Vic

              ~ 1989 MGM LS Colony Park - Large Marge
              ~ 1998 MGM LS - new DD
              ~ 1991 MGM LS "The Scab"
              ~ 1991 MGM GS "The Ice Car"

              Comment

                #8
                That's cool man, I appreciate it. I'll have to check the egr and see if that's the culprit.

                Comment

                  #9
                  check the condition of the vacuum lines. Big vac leaks make these run very stupidly. A stuck open EGR valve would do it too.
                  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

                    #10
                    Well, if the pcv filter is a source of an idle miss, this might do the trick. It's pretty gummed up and weighs about 3 times as much as the new one.

                    Click image for larger version Name: image.jpg Views: 1 Size: 163.0 KB ID: 1274060

                    Comment

                      #11
                      Try cleaning the egr as well, even though its new it can still become clogged with carbon....had this issue on my '84.

                      Comment

                        #12
                        Originally posted by Louis View Post
                        Try cleaning the egr as well, even though its new it can still become clogged with carbon....had this issue on my '84.
                        Yeah I cleaned out the egr also. It made a difference too. The problem is still there, but not as bad as it was before.

                        Comment

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