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    #1

    Bucking with no power

    I have an 87 Crown Vic 302 F.I. 158k. After about an hour at highway speeds the other night the car began to lurch pretty badly, top speed would vary between about 45 and 70 mph. Even when I would floor the gas pedal it would have no effect. I noticed if I was going downslope it was better about one thrid of the time. I did manage to get it home although it died at two traffic lights. Starts up just fine. approximatly three to four thousand miles on new o2 sensors two injectors and plugs. This may not be related but I have a very audible clicking noise coming from a relay on the drivers fenderwell the one furthest from the front. I have heard it clicking from time to time prior to the bucking.

    Thanks
    Tags: None
    #2
    Sounds to me like there is something clogging the exhaust somewhere. I would start by checking the cats. The clicking sound my be either backfiring inside the cat or a fuel pump relay
    R.I.P Linsey Nelson

    '04 M75-"Chocolate Rain" - mid 13 beast
    Originally posted by MeanVic84
    Chocolate Rain. Some stay dry and others feel the pain.

    Comment

      #3
      Fuel filter could be clogged, TFI could be dying...

      Generally a clogged cat is constant....

      Could also be one of many sensors going bad and confusing the ECU.

      Getting the codes checked would be a good place to start.
      Builder/Owner of Badass Panther Wagons

      Busy maintaining a fleet of Fords

      Comment

        #4
        +1 on the fuel filter...sounds like a textbook case of a clogged filter to me.

        2001 Ford Crown Victoria P71 - "The Fire Engine"
        1985 Lincoln Town Car Signature Series
        But God demonstrates his own love for us in this: While we were still sinners, Christ died for us. Romans 5:8

        Comment

          #5
          yeah, bad load of fuel could do that. water and dirt in the filter = no run good.
          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

            #6
            Looks like the fuel filter is the consensus, it has over 15k on it anyway. Thanks for everyones suggestions.

            Comment

              #7
              check the fuel pump relay connections

              1986 lincoln towncar signature series. 5.0 HO with thumper performance ported e7 heads, 1.7 roller rockers, warm air intake, 65mm throttle body, 1/2" intake spacer, ported intakes, 3.73 rear with trac lock, 98-02 front brake conversion, 92-97 rear disc conversion, 1" rear swaybar, 1 3/16" front swaybar, 16" wheels and tires, loud ass stereo system, badass cb, best time to date 15.94 at 87 mph. lots of mods in the works 221.8 rwhp 278 rwt
              2006 Lincoln Town Car Signature. Stock for now
              1989 Ford F-250 4x4 much much more to come, sefi converted so far.
              1986 Toyota pickup with LSC wheels and 225/60/16 tires.
              2008 Hyundai Elantra future Revcon toad
              1987 TriBurner and 1986 Alaska stokers keeping me warm. (and some pesky oil heat)

              please be patient, rebuilding an empire!

              Comment

                #8
                Originally posted by lincolnmania View Post
                check the fuel pump relay connections
                I am thinking the fuel pump is dying, myself. The sound you are hearing is the increasing load of the dying fuel pump wreaking havoc on the fuel pump relay....this is my prediction.

                Comment

                  #9
                  I agree with it being a fuel pump issue of some sort. The clicking is the relay, and when it clicks, you usually lose power a second or two later correct?
                  Nick
                  88 Colony Park LS
                  G-pa's old car, but he's cruisin around heaven in his 69 wagon now
                  Future plans:Semi HO conversion, or Explorer motor swap, shift kit, PI springs and sway bars, KYB-GR2 shocks

                  Comment

                    #10
                    swap out the relay for one of the others and proceed
                    Pete ::::>>> resident LED addict and CFI defector LED bulb replacements
                    'LTD HPP' 85 Vic (my rusty baby) '06 Honda Reflex 250cc 'Baileys' 91 Vic (faded cream puff) ClifFord 'ODB' 88 P72 (SOLD) '77 LTDII (RIP)
                    sigpic
                    85HPP's most noteworthy mods: CFI to SEFI conversion w/HO upperstuff headers & flowmasters P71 airbox Towncar seats LED dash light-show center console w/5 gauge package LED 3rd brake light 3G alternator mini starter washer/coolant bottle upgrade Towncar power trunk pull underhood fuse/relay box 16" HPP wheels - police swaybars w/poly rubbers - budget Alpine driven 10 speaker stereo

                    Comment

                      #11
                      88MercWagon, The bucking behavior began when I was passing another vehicle going slighty upgrade. The clicking relay has been there on and off for about sixty days, although it does seem to be getting louder I can not hear it when driving the car. I have every bit of paperwork on this car including the order sheet it has never had a relay or pump replaced it did get a new module under a recall way back. I put about 150 miles a day on so if the pump was going I could follow. Do you know if it ( pump) is in the tank or external?

                      Thanks

                      Comment

                        #12
                        The pump is inside the tank.

                        2001 Ford Crown Victoria P71 - "The Fire Engine"
                        1985 Lincoln Town Car Signature Series
                        But God demonstrates his own love for us in this: While we were still sinners, Christ died for us. Romans 5:8

                        Comment

                          #13
                          Fortunately you can access the sending unit without dropping the tank.
                          1987 LTD CROWN VICTORIA, 5.0 EFI, MAGNAFLOW DUAL EXH, RED LANDAU
                          FRESH AOD, 3.27 OPEN DIFF, 57K MILES, B&M SHIFT KIT AND R134A A/C

                          Comment

                            #14
                            yeah but its not the side where the pump is the pump is on the rear side of the tank, up against the trunk. Has to come down to get it out. The one on the front is for the fuel gauge sender.
                            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

                              #15
                              I received my code scanner and fuel pressure gauge from Fed Ex. The car had an EVP code in stored memory no continuous codes and 46lbs of fuel pressure running. I took a tooth brush to the egr and passages replaced the fuel filter and fuel pump relay. When I rechecked for codes the evp a code 34 I think it was had disappeared. The fuel pressure had dropped to 38 lbs car ran good. I did however now have a continuous code 94. Took the car for a 30 mile ride no problems. Then I tried to take it to work this morning, got about seven miles and it was back to bucking I noticed though that when I would try to rev the motor in neutral I got thick black smoke out the exhaust.

                              Suggestions?

                              Comment

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