MY CAR WONT START ? What voltage does the portable jump start need to be ?

38
Found 17th Feb 2015
CAR WONT START MEASURED VOLTAGE OF 11.85V skoda fabia diesel.
What voltage does the portable jump start need to be ?
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38 Comments
Voltage sounds fine.

Tried jump starting it?

What car? Make/model/engine?
If the engine turns over the battery is fine
Feel free to give a bit more info!! are you over 17?
Skoda Fabia , diesel engine The engine doesn't crank , it just clicks , i tried jump starting but the after i measured the voltage again it decreased to 11.85 . Also the dashboard lights flicker
Edited by: "bam3411" 17th Feb 2015
Im 20 , I don't use the car that much maybe just to go shopping to the supermarket twice a week
Need to charge the portable jump starter, i think it wasn't fully charged
Edited by: "bam3411" 17th Feb 2015
11.95 V fine for cranking voltage - only about another 30 things it could be , members might enjoy the guessing game but really you need it checked out by a mechanic .
ELVIS_THE_PELVIS

Feel free to give a bit more info!! are you over 17?


are you?
bam3411

Skoda Fabia , diesel engine The engine doesn't crank , it just clicks , i … Skoda Fabia , diesel engine The engine doesn't crank , it just clicks , i tried jump starting but the after i measured the voltage again it decreased to 11.85 .


If it clicks could be a jammed starter motor or solenoid . Try rocking the car backwards and forwards in gear this may free the motor if it is jammed .
Edited by: "rogparki" 17th Feb 2015
starter motor
Starter motor stuck ?
80 quid plus fitting.. which will be about 90 minutes.....
generaloneill

are you?


am I what?
11.85 won't be enough to crank a diesel. Jump it
get a friend who's a member of the AA to help you or try jump start
If it just clicks it's probably a loose connection. Check connections on battery & solenoid. possibly starter motor,

but probably loose connection on battery, particularly if you have recently put the battery back in
Some cars require the battery to be recharged for at least 10 minutes. I would give it a go.
Also I would change the battery before blaming the starter motor.
It's not just about voltage, It's about the amps, A dead battery can give a reading of 12v. With a diesel you'll need a good set of leads.
bubblegum2910

If it just clicks it's probably a loose connection. Check connections on … If it just clicks it's probably a loose connection. Check connections on battery & solenoid. possibly starter motor,but probably loose connection on battery, particularly if you have recently put the battery back in



As above I reckon.
Try jumping it off another diesel with descent leads. If it fires up it's most likely the battery, most places can check the old battery anyway and once started if battery reads between 13-14v the alternator should be Ok.
rogparki

If it clicks could be a jammed starter motor or solenoid . Try rocking … If it clicks could be a jammed starter motor or solenoid . Try rocking the car backwards and forwards in gear this may free the motor if it is jammed .




Agree with Rogparki
first thing to do in gear and rock the car ,also works to tap the soleinoid on the starter but that's possibly difficult to reach.If the battery shows over ten volts whilst cranking it's a good battery but clicking def stuck starter.You could probably tow it off say 20 mile an hour in 2 or 3rd gear clutch in ,ignition on. when speed is up let clutch up,engine then turns because road wheels linked all the way through If you try stationary do make sure you get plenty of heat through to the glow plugs by ign on then off when wiggly light goes out then on again a couple of times
Get your local garage out to start it, they will be able to diagnose the problem first hand, instead of getting " guesses " from a shopping forum.
if your car battery is more than 7 year old and have problem with starting.
time to buy a new battery.
Inactive

Get your local garage out to start it, they will be able to diagnose the … Get your local garage out to start it, they will be able to diagnose the problem first hand, instead of getting " guesses " from a shopping forum.



The missing word is " guesses ", not sure why it was missing?
rogparki

If it clicks could be a jammed starter motor or solenoid . Try rocking … If it clicks could be a jammed starter motor or solenoid . Try rocking the car backwards and forwards in gear this may free the motor if it is jammed .


Not going to happen as selenoid engage starter motor only when needed. don't try to rock your car while trying to start and in gear!!!!
Easiest - way get jump leads connect to other car let other car to tin his engine for about 5-10 min ( to give bit of charge to your battery ) then start your car up. less than 12V while in stationary my be not enough to start your engine. every circuit in your car drain a little bit causing overall voltage to decease. heating glow plugs can decrease voltage by 1.5-2.5V. while jump starting from other car overall voltage in your car will be around 14V ,then cranking voltage should be over 12. if still won't start you need to get mechanic to look for problem.
shauneco

It's not just about voltage, It's about the amps, A dead battery can give … It's not just about voltage, It's about the amps, A dead battery can give a reading of 12v. With a diesel you'll need a good set of leads.

correct it is misleading but a battery can say 12v and still be duff as already stated amps need to be checked on the battery as this is more important on a diesel , had a similar issue on my diesel car not firing at all turn out to be the battery volts were fine bit the cracking amps were half of what they should be.
To add, The clicking will most probably be the solenoid trying to engage the starter motor but not enough amps to turn it. It could possibly be a loose connection but I think you'll probably find the battery is a dud. If the battery is more than 5 years old then Id opt for a new battery, One that is at least as powerful as manufacturer recommends. The more CCA the better, Diesels are more sensitive to batteries than petrol as they require much more amps to fire up.

If you jump it the other car should ideally be equally powered as it may struggle to jump from a 1.0L Corsa for example unless the current battery retains some charge.!!!.
I think it is the battery the voltage decreased to under 10 volts after trying to jump it again
gsf eurocarparts or similar and get new battery. don't forget about quidco tcb
check charging voltage afterwards, engine running dipped beam on should be 14-14.4V
I will try charging the battery for a day
bam3411

Hmm actually the battery is newish I didn't know my dad replaced it , … Hmm actually the battery is newish I didn't know my dad replaced it , once I took the battery out of the car the voltage increased a lot . Maybe something to do with the car the alternator perhaps ?



Just take it your local garage or motor electrical specialist, they will no doubt sort it.

Nobody on a forum can properly diagnose the fault from a distance.

Edited by: "Inactive" 18th Feb 2015
Charged the battery to 12.55v now the car is starting now
bam3411

Charged the battery to 12.55v now the car is starting now




Thanks for the update, but you have not cured the underlying problem.
I'm looking at replacement batteries the original battery is a Varta d24 , and hoping to replace with a Varta d15 around £54 online including delivery . The size is 027 and calcium sealed
Anyone else have a Varta battery in there car ?
I was actually going use epsom salt and distilled water to fix it , but I couldn't get the battery seal off its glued to the battery
Inactive

Thanks for the update, but you have not cured the underlying problem.

agree the problem hasn't been fixed and will be back again
you might want to consider one of these to give you a heads up if something is going wrong ebay.co.uk/itm…057
http://i.ebayimg.com/00/s/NDYwWDQ2MA==/z/-o0AAMXQ7j1SKdDN/$T2eC16J,!w4FIZwtYmevBSKdDNF%29W!~~60_12.JPG
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