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    #1

    Fuel quirk

    Not sure the most eloquent/professional way to describe my problem, nor am I very mechanically inclined, so I'm gonna spit out some words and hope for the best. So my 1988 grand marquis has this weird thing that when the gas tank gets under half/a third of a tank, and I make a left turn, the engine bogs down, losing like all power. The less fuel I have, the worse it happens. Sharper turn=worse. If I coast through the turn it isn't noticeable. But when I have to accelerate off a stop sign or whatnot it does it. Also happens in roundabouts if I'm going fast-ish. Never happens with a right turn, never happens with a full tank. My theory is it has to do with centrifugal force pulling the gas away from where the fuel pump pulls gas? I had a new fuel tank put in in April, started around then.
    Was something installed improperly when the new tank went in?
    Is my fuel pump on its dying breath?
    Should I be concerned at all? It's never actually died, and I've gotten used to driving it that way.
    Anything I can/should do about it?

    Secondary fun theory: My car is trying to tell me it's not, in fact, a nascar by refusing fast left turns.

    Thanks
    Tags: None
    #2
    Fuel slosh. Sounds like someone replaced the fuel pump and either didn't put the sock back on, didn't put the right sock on, or it just fell off. The sock is what is used to make sure the pump sucks from the very bottom of the tank. Without it in there right, it'll suck air whenever the fuel sloshes around enough.
    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
      Is that something that needs to be addressed? Will it prevent my car from using the last few gallons of my tank? I've yet to run it lower than a 1/6 tank or so. Maybe I'll throw a gas can in the trunk and find out. For science and whatnot.

      Comment

        #4
        I'd fix it, if only because it would annoy the shit out of me. The pumps are cooled by the fuel pumping through them, so pulling air isn't helping it. The engine also won't appreciate running lean.

        Its probably more likely to run out of fuel before the tank is empty if something is wrong there. Honestly haven't heard of many people with slosh issues on a box, but nothing is impossible. If the pump isn't pushed all the way down in the rubber condom it mounts in, that might also do it.
        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
          LoL..

          Fireturd does this but my box does not. I always thought they factory tanks had baffles or the pump has multiple pick-ups. I've had to run it of fumes sometimes but had no issues with turns.
          1985 LTD Crown Victoria - SOLD
          1988 Town Car Signature - Current Party Barge

          Comment

            #6
            One of my cars has the same type of problem, but it's a '91 so slightly different setup and it's right turns for me. I figured the problem is exactly what gadget73 said but I've been too lazy to fix it so I just make an effort to fill up when I get down to 1/4 tank left or remember to take right turns a bit easy.

            Mine started after a new pump and hanger assembly was installed (not by me), but I have no idea how the car ran before that since it was one of the first things that needed to be done to the car when I got it.

            Also, I would have to agree that the most obvious problem is how annoying it is. Gadget mentioned the actual problems but, to add to that, if it stalls like mine it can be a safety issue due to people behind you not expecting it... perhaps I should fix that since I plan on driving that car again in the next few months.
            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

              #7
              Originally posted by DerekTheGreat View Post
              LoL..

              Fireturd does this but my box does not. I always thought they factory tanks had baffles or the pump has multiple pick-ups. I've had to run it of fumes sometimes but had no issues with turns.
              The fireturd has one of those flat mounted GM tanks like similar to the b-bodies doesn't it? The 85 Pontiac Parisienne I had would have the slosh issue if I cornered hard enough on a low tank. The q-jet would bog out for a second because of blowing nothing but air into the carb for a few seconds.

              Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. -- Albert Einstein
              rides: 93 Crown Vic LX (The Red Velvet Cake), 2000 Crown Vic base model (Sandy), 2003 Expedition (the vacation beast)

              Originally posted by gadget73
              ... and it should all work like magic and unicorns and stuff.

              Originally posted by dmccaig
              Overhead, some poor bastards are flying in airplanes.

              Comment

                #8
                Originally posted by sly View Post
                The fireturd has one of those flat mounted GM tanks like similar to the b-bodies doesn't it? The 85 Pontiac Parisienne I had would have the slosh issue if I cornered hard enough on a low tank. The q-jet would bog out for a second because of blowing nothing but air into the carb for a few seconds.
                Those things have tanks somewhat similar to what boxes have; it's mounted right above the rear axle on the side of the diff cover. Why they have a non-existent trunk. I want to say carbs would be more resistant to the fuel slosh thing under light driving conditions.. Seems like if there was enough fuel in the float bowl and if that garbage was set up and working right there's be enough time for the pump to make up for the gap in the fuel supply. Though if the bowl was metering fuel on the low side the same thing could happen under hard cornering. Not sure if Q-jets have the bowls on the opposite sides of Holley's. All I know are Holley's.
                1985 LTD Crown Victoria - SOLD
                1988 Town Car Signature - Current Party Barge

                Comment

                  #9
                  It was more resistant... but I hooned the crap out of that car (as much as it would let me for a smogged 305).

                  Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. -- Albert Einstein
                  rides: 93 Crown Vic LX (The Red Velvet Cake), 2000 Crown Vic base model (Sandy), 2003 Expedition (the vacation beast)

                  Originally posted by gadget73
                  ... and it should all work like magic and unicorns and stuff.

                  Originally posted by dmccaig
                  Overhead, some poor bastards are flying in airplanes.

                  Comment

                    #10
                    LoL, 0-60 in 30 seconds... Weren't they rated at 140 hp & maybe 255 ft-lbs? Anemic doesn't even begin to describe that.
                    1985 LTD Crown Victoria - SOLD
                    1988 Town Car Signature - Current Party Barge

                    Comment

                      #11
                      Q-jets have the bowl on the front. Holleys have two bowls usually, front and rear with a crossover tube. Primary on the front, secondary in the rear. Bigger ones had dual fuel inlets with what amounts to a fancy looking T pipe to split the fuel line to both inlets. Not sure if the smog era Qjets had lower float settings, or maybe it was reduced bowl capacity or something but I know they had some electronic metering rod bullshit in there. Possible that occupied some of the fluid space and made them a bit more prone to starving. I've never been into one of those honestly, only ever messed with the old mechanical ones.
                      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

                        #12
                        It was very anemic. It really liked doing about 90mph though. The roundy box (beater gonna beat) gits much better than the 305 ever did.

                        Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. -- Albert Einstein
                        rides: 93 Crown Vic LX (The Red Velvet Cake), 2000 Crown Vic base model (Sandy), 2003 Expedition (the vacation beast)

                        Originally posted by gadget73
                        ... and it should all work like magic and unicorns and stuff.

                        Originally posted by dmccaig
                        Overhead, some poor bastards are flying in airplanes.

                        Comment

                          #13
                          As $$ spent on fuel level guages don't make you faster, i take hard turns when I sense the tank is getting down there, if the motor cuts out a second (when bypassing my surge tank/pumps), I know I'm at 1/16th tank and she's time to find a gas station lol.

                          My pumps are actually 3/4" from the bottom of the tank and do fine till i'm around 1/16th.

                          Losing power steering and brakes on an off ramp or curve is no fun.
                          Finally have an on the books porting/custom fab business!
                          HO bottom end,GT40Ps,cut/welded/ported upper+lower GT40 intakes,Comp XE258 cam,MS3X megasquirt computer,8 LS2 coils,2 dry systems + a 3rd wet,3 core rad w fans..1100hp Lentech WR AOD,custom 4" aluminum/moly Dshaft,custom rear/back half chassis adjustable 4link,wilwood 4 piston,moser 9" axles,locker, M/T 30x12's,4 staged fuel pumps,100lbs sound insulation,power/remote everything,2000W sound.4480lbs. 4.5s 0-60,12.8 1/4

                          Comment

                            #14
                            When the fireturd does that it still runs a bit, like 200-300 RiPM's which seems to be enough to keep the power steering system happy. It's never stalled out on me yet (Luckily)
                            1985 LTD Crown Victoria - SOLD
                            1988 Town Car Signature - Current Party Barge

                            Comment

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