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Car question

Discussion in 'General chit chat' started by career707lover, Jun 15, 2014.

  1. career707lover

    career707lover Busy Member

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    Hey guys, right first off, I dont really like modern cars as I hate all the electronics etc, great when they work but when they break, your car doesnt work and its usually expensive. My question is can you bump start a car with a knackered ECU? Im not too clued up on all the electronic stuff but I gather that the ECU is the "brains" i.e. can do all sorts of things from come up with correct air/fuel mixture to control ignition and allow your car to start, show fault codes etc.

    Im just wondering if a car wont start because the ECU is broken, by bump starting it, i.e. taking the ignition, battery and most of the electronics etc out of the equations would it maybe fire up as it would get a spark from the bump start, but just conk out again because it doesnt have the ECU controlling everything (fuel/air/pumps) or would it run but just not run at optimum level? Thanks :)
     
  2. jesim1

    jesim1 Kit bitch to the Stars

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    Sorry mate, it just won't work, it needs the ECU to work all the electronics from fuel/air mix to valve timing, and if it's knackered you could get total engine failure. Normally it goes wrong, but then drops into a "get me home" mode, if it fails totally and cannot be reprogramed, it's toast!

    James
     
  3. career707lover

    career707lover Busy Member

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    Thanks James, really appreciate the reply mate :) I was hoping that was not going to be the case but suspected it might be lol. That explains a lot though as my mate had a sports car that kept going into something called "limp" mode so that sounds similar.

    With mine I can send the ECU off to someone and see if 1) It definitely is the ECU and 2) If they can repair it then its still coded to my car so hopefully its not toast and repairable.Thanks again bud :)
     
  4. Paul Cann

    Paul Cann Posting Addict

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    The answer is subjective, firstly it depends what is wrong with the ECU and what it's fitted to, think of an older Diesel engine as an example as they will run with no electrics whatsoever ( no spark plugs ) which is why they are favoured for off-roading , if a car goes into " limp mode" it more likley a sign that a different fault has occurred and the ecu is functioning correctly by putting it into limp mode ( if it was pickled there is less chance it would be able to go into limp mode) before assuming its the ecu you should invest £40 in a code reader from flea bay or borrow one and plug it Into your cars OBD socket , this is designed to read off any faults on the ecu and tell you what the fault is ( another job the ecu is designed to do) . It could be something simple like a lambda sensor that is faulty. My shogun went Into limp mode a few times as did my Mercedes and it was a simple split in the turbo hose causing it on both occasions , a lot cheaper than sending off or replacing the ECU , what is the fault? What car is it ? Any other symptoms?
     
  5. Patrick

    Patrick Donator

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    Also bump starting a modern car can damage the catalytic converter I believe if my memory serves me well.
     
  6. davymole

    davymole Donator

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    Like most of the previous replies car manufactures have made most cars ecu controlled but early 1990,s peugeot diesels powered cars would start with a bump and like Patrick has said you will fxxk up your catalytic converter trying to bump start it,best car to buy would be a ford with a starting handle used to start with one swing
     
  7. Patrick

    Patrick Donator

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    Spent most of my working life,about 35yrs, in the motor trade(on the parts side)and all i can say is modern cars are streets ahead of their predecessors.Even a small hatch back comes with virtually everything on it.Do we really want to go back to the days of starting handles,vacuum wipers,drum brakes all round and servicing every 6000 miles with oil changes every 3000 miles.When I started in the motor trade( 1963) it was only the deluxe model of a car that had a heater as standard everything else was an accessory or optional extra,for what there was.Those days have long gone thanks
     
    Last edited: Jun 16, 2014
  8. edtwozeronine

    edtwozeronine Donator

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    I'm not very well versed in car fixings but I agree, modern cars are amazing and very reliable most of the time. There was a free DVD in some car magazine that showed the level of research and development that's been going into the humble Ford Fiesta through the years. Doing things like keeping an engine going 24/7 until it died to figure out which parts are most likely to fail and then doing something to improve the design as a consequence. Pretty hardcore stuff.

    Having owned a couple they rarely needed anything major done to them until I did my own destruction test as a pizza delivery driver with a 2001 model for 4 years. Over those 4 years, mostly tyres, brake pads and oil changes were required but later a coil-pack (whatever that is:rolleyes:) needed changing and my car went into "limp home mode" but was fairly easily fixed by a mechanic family friend. Later still, not long before I quit the clutch went, but between myself and my father we bought and replaced it on our driveway over several months. The main cost being £70 for the new clutch assembly.

    With normal social/commuter use, I'd expect very little trouble from any modern car.
     
    Last edited: Jun 16, 2014
  9. Patrick

    Patrick Donator

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    Most modern cars providing they're serviced regularly will give trouble free motoring,a thing we've come to expect and take for granted.Most,not all,problems arise from lack of maintenance,this is born out by the AA stating that a lot of their call outs are due to lack of maintenance.Modern cars do carry a lot of sophisticated electronic equipment which can be very expensive when it goes wrong especially on the more expensive sophisticated models but it doesn't happen that often fortunately If anyone wants my humble advice on buying a car(secondhand) it's this:
    (a) don't buy a car with little or no service history,unless it's reflected in the selling price,no s/history usually means no maintenance
    (b)be cautious about buying a car that's been owned by a young female,after all if it's a choice between getting the car serviced or a new pair of high heels which do you think she'll choose,it wont be the car serviced.Also most young girl drivers never check the levels until the warning light comes on then dad usually has to do it.
    (c) sometimes it's better to buy a car with a slightly higher mileage than normal providing it's been properly and regularly serviced than a lower mileage one without the regular and proper maintenance as most cars these days do phenomenal mileage A taxi driver customer of ours once had a Vauxhall Carlton that was on its 3rd time round the clock on the same engine.
     
    Last edited: Jun 16, 2014
  10. jesim1

    jesim1 Kit bitch to the Stars

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    Ohhh Patrick you old romantic, I had forgotten about these:D Next you will be serenading us with tales of twin 40s and bilsteins all round LOL :D

    James
     
  11. Patrick

    Patrick Donator

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    Yes I remember the days when disc brakes started coming in and people use to put a "CAUTION DISC BRAKES" sticker on the back of their car and vinyl seat cover material,not cloth,that use to get bloody hot in the summer if your car was left in the sun.:eek::D
     
    Last edited: Jun 17, 2014
  12. Ichabod Armacost

    Ichabod Armacost Donator

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    Strewth!!! You're really old aren't you!:eek:;)
     
  13. Paul Cann

    Paul Cann Posting Addict

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    So if a cat would be damaged by bump starting a car how is this different to an old fashioned silencer?
     
  14. Ichabod Armacost

    Ichabod Armacost Donator

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    Don't quote me on this, because I am a bit hazy on it. My understanding was that during "bump starting", a lot of unburnt fuel can find it's way into the Cat Converter, when the engine does fire, the resulting small explosion of the unburnt fuel in the cat converter causes damage to the "precious metals" within, or summat along those lines? A silencer of course has no such metals within it.
     
  15. Patrick

    Patrick Donator

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    Yep that's basically it,don't know the exact technicalities but it's all to do with unburnt fuel entering the catalytic converter and having an adverse effect on the precious metal(s),platinum I believe,inside.

    P.S I'm 67 by the way Ichabod
     
  16. Patrick

    Patrick Donator

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    It's as Inchabod said i.e unburnt fuel entering the converter,surprised you didn't know that.
     
  17. Ichabod Armacost

    Ichabod Armacost Donator

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    I was right then, you is ancient!!!!! Oh well, I am 66, so yer ancienter than me!:D I tend to forget sometimes you know that a lot of the younger ones wont have a clue what us old farts are on about half the time........."WARNING DISC BRAKES" I remember those stickers, and I remember why those stickers. It would open the eyes of the younger drivers these days to spend just a couple of hours behind the wheel of the likes of a Standard 8 or an Austin 7.........

    0-60?? maybe eventually if there is a following wind!:D

    Braking distances?? least said soon as mended!:eek::D

    Austin Cambridges and Morris Oxfords and the like with "Floppsy Bunny" Armstrong shock absorbers???............Redex upper cylinder lubricant, if you went into a garage today and asked for 4 and 4 shots, they would think you were after class A drugs or summat!:D

    Oh b****r it, that's enough nostalgia for one day!!:loco::D
     
  18. Patrick

    Patrick Donator

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    Yes Ichabod 4 gallons & 4 shots and all for a £1! Premium(4star) petrol 4s/9d(24p) a gallon,Regular(2star) 4s/3d(21p)a gallon and Reddex 1d a shot at the garage where I worked and an attendant to fill your car for you.Mind you wages were a bit grim
     
    Last edited: Jun 18, 2014
  19. Ichabod Armacost

    Ichabod Armacost Donator

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    Ah yes I remember it well!:thumb: It hardly seems credible now does it?

    By the way, the names Ray.....................Nobody is called Ichabod!!!!:D Wages??? Oh yeah.......£2-10s-6d was my first weeks wage, I thought I was rich!!!!!! Used to get a monthly bonus that shoved it up to about £5-12s-0d.
     
    Last edited: Jun 18, 2014
  20. Patrick

    Patrick Donator

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    Ray mine was £3-13s-6d gross,£3-6s-9d net after deductions and had to give my mum £1 house keeping (dad made sure I did).But at least jobs were pretty plentiful then when I started work in 1962
     
    Last edited: Jun 18, 2014

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