Ford Falcon Ba Shaking/Vibrating in Idle

Lkokaln4e on 13/06/2015 - 14:48
Last edited 13/06/2015 - 14:49

I have 6 cylinder Ford Falcon BA Petrol. I was very low on petrol had around 5-10km left went to put petrol and after i filled the car. From then When I start the car is fine but when the engine gets warm it starts to vibrate badly at idle position and low rpm, after (30km/h +) seems good..

It looks like one cylinder is misfiring. I have checked the ignition coils and they all seemed fine, sparking and making clicking noise, but one of them had something like silicone (or rubber i am not sure) inside and had oil all over the spark plug and coil, Any idea on what could have gone wrong?

Automotive

Comments

  • nocure on 13/06/2015 - 16:51

    Sounds like the fuel pump has picked up some crap off the bottom of the fuel tank…try http://www.fordforums.com.au/

  • Cave Fire on 13/06/2015 - 17:04

    From yahoo answers:

    If the oil is outside the cylinders it's likely that you have an oil leak, possibly a bad valve cover gasket.

    If the oil was found INSIDE the cylinder, you've likely got badly worn rings, valve stem seals or a blown head gasket.

    I'm guessing it's the first one in your case.

  • Mad Max on 13/06/2015 - 17:12

    Common problem in Falcons. It could be a number of things but I would start changing the fuel filter and if that does not work get the injectors cleaned or try with a injector cleaner fluid and a full tank on 98 octane petrol (cheaper if it works). The oil on the spark plug probably was already there and is unrelated. Either loose spark plug or a leak from the rocket cover…or depending on which spark plug it is, if it is one at the front may be you just spilt oil in it when topping up or changing the oil.

    • kokaln4e on 13/06/2015 - 18:20

      Yea its the front spark plug you are right, when i was changing the oil last week i spilled some but i forgot.. i tried with 91 and injector cleaner fluid but still the same, this time i am gonna put 98 and change the fuel filter.

      • Mad Max on 13/06/2015 - 18:31

        Some swear by this recipe: 1 l of turp +1 l of metho plus full tank of 98. I have not tried myself but many say it works.
        Nulon injector cleaner full bottle in a full tank of 98 also could do the job.
        Best thing would be to remove the injectors (not difficult if you are handy with tools) and get them professionally cleaned and serviced. Good luck and let us know how you go.

        • kokaln4e on 14/06/2015 - 19:57

          I put nulon injector cleaner with 98 ans and drove around 20 km, I see some difference doesn't shake as much as before at idle better fuel economy and goes smoother, but still didn't completely fix the shaking,about the fuel filter i couldn't replace it, I tried with 2 wrenches twisting but it was super tight..any advice?

  • PVA on 13/06/2015 - 17:14

    blocked fuel filter maybe, running low has sucked up gunge on the bottom of the tank.
    or idle speed is really low.

  • AMLagonda on 13/06/2015 - 22:54

    Really I dont think a BA Falcon will have ANY crap on the bottom of the tank….

  • StewBalls on 14/06/2015 - 01:03
    +4

    Ignore all of these guys, you clearly have a problem with the Flux Capacitor…it just needs a little fresh Plutonium…with just a little more fissile material, the old girl will be back up to 88mph in no time! ;)

    • Mos80y on 01/02/2017 - 20:44

      StewBalls
      What do u mean by Flux Capacitor and haw to fix it???

      • Euphemistic on 02/02/2017 - 08:57

        MArty McFly can give you the contact details for Emmett Brown who can fix it.

    • Mos80y on 04/02/2017 - 14:51

      Flux Capacito it is bought one and problem solved

    • sd4f on 08/02/2017 - 14:18

      That's just a fancy name for an inductor!

  • Mad Max on 07/02/2017 - 15:52

    Never heard of a flux capacitor.
    What is it for???…time travel???

  • sd4f on 08/02/2017 - 14:38

    You could be having a vacuum leak if it's only happening at idle. Easiest way to diagnose that is if a workshop has a smoke machine to try to find a leak, or try to find a hiss.

    Another thing would be to get the codes scanned. At idle your emission control systems are quite important. Something like mass air flow sensors, oxygen sensors, even temperature sender can change how it idles. Bad feedback means poor mixture. Just take note that lack of codes doesn't mean that the sensors are working properly. They're notorious for working enough for the computer to not see it, but not well enough for smooth operation.

    The low fuel tank would probably be a coincidence. I can't really see it sucking crap from the bottom of the tank, because it would have done it anyway, that is the fuel tank hose will be at the bottom anyway, that's where the fuel gets sucked from first. If your fuel filter hasn't been changed in a while, it can't hurt.

    Regarding the oil on one spark plug, is that just on the outside, or have you unscrewed that plug and looked at the electrode? If there's oil on the electrode, then it's clear that cylinder isn't firing, which would point to either an injector, coil or the plug itself, however, these faults usually get worse with RPM, rather than go away. Coils though have been known to go faulty with temperature as everything expands and inside something can short.

    Regarding reading the plugs, do a google search and you can see what plugs should look like, and whether they're running to lean or too rich. With computer injection, it will be getting the wrong mixture only because something isn't working properly, either a sensor failing, or an injector failing.

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