No acceleration

Asked by Nov 05, 2017 at 06:30 AM about the 2004 Volkswagen Polo

Question type: Maintenance & Repair

Hi everyone, my car is a polo twist 2004. I
drove home Friday and parked my car but
when I got back in it the EPC Light had
come on the dash and my car was in limp
mode.  Today I connected my battery to
my friends car for a jump start as my car
was stood for 3 days so the battery died
and everything came back to normal but
the light on the dash stayed on. I took the
jump leads off and turned my car off and
then back in and the same thing
happened. No acceleration again. I
reconnected jump leads and it started up
fine again revs came back but as soon as I
disconnect jump leads and turn Car off it
all happens again. Could this just be a
case of buying a new battery or could it be
the alternator not charging the battery or
something else. I’ve always had trouble
with my car on odd days not starting for 10
minutes but she always ended up getting
me where I needed to go. Any advice
before I go out and buy a battery that
might not be what is needed please would
be much appreciated. TIA Joanne

4 Answers

269,525

Since the light is on, you should scan the car for the fault codes. Hard to say if you need a new battery or it is being drained. Once the car is started, probe the battery, is it around 14V on your multimeter? If so, the alternator is fine. What is the voltage once you take the leads off? How old is the battery? If over 5 years old, I would replace.

Thank you, someone has told me to use a voltage tester to see if it’s the battery or the alternator that isn’t charging the battery. The battery is older than 2 years as it’s bern there since I bought the car but I’ve always had problems starting but if I use jump leads it starts straight away. Been like this since I got it so if it was the alternator wouldn’t it have gone a lot sooner?

24,415

Do NOT use jumper cables on your car- this should be a message posted at the top of the Gurus page 'cuz I get tired of telling everybody- 21st Century machinery does not like reverse currents coursing through their elaborate wiring and computer systems- hello- and more generic advice- just take your car to a mechanic who can diagnose what the problem is instead of just guessin' 'cuz the guessin' can get expensive-

11,245

lol tom is good and on t he right track you can also use a voltmeter to test the battery out. while the car is siting off the batteery should be holding a charge of 12.1 to 12.5 volts during operation the car should be producing at the least 13.5 volts and during driving it should operate at 14.5 to 14.8 volts a volt meter would be the easiest way to check that out. I myself would jsut pop by an audi or vw dealer and swap out the battery should be less costly this way and they take the old battery for free which also gets you that discount to make it cheaper to buy.

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