cranking but failing to start intermittently 116i

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Manufactured from 2004 to 2011

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koerce
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cranking but failing to start intermittently 116i

Post by koerce » Thu Apr 19, 2018 10:57 pm

116i 2009 petrol

Intermittent fault that seems to be getting worse, would like to diagnose before I get stranded.

I made a 2 hour journey at the weekend and left the car for about an hour before getting back in and starting it up, I put my foot on the clutch and pressed start and it began to crank a few times but really struggled to get going then died, put my foot on clutch again and pressed start and it started normally.

Seems to start ok in the mornings, I've drove it again earlier and same issue - cranks then really struggles to start like it's almost catching a spark or gasping for fuel but then dies but other times it will start eventually after struggling. drove it a few times and the issue seems to be when I have made a journey and left it for a little while. Don't think it's the battery as i have driven for 2 hours so it should be charged ok.

where to start? spark plugs? Is it a fuel pump or crankshaft sensor? how much to replace? thanks
Last edited by koerce on Thu Apr 19, 2018 11:10 pm, edited 1 time in total.

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Octavius
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Re: cranking but failing to start intermittently 116i

Post by Octavius » Thu Apr 19, 2018 11:02 pm

Check the positive cable that runs from the battery to the front of the car. These are known to corrode and cause the issue you are experiencing.
MY SIGNATURE STOPPED WORKING AFTER AN UPDATE.

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Octavius
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Re: cranking but failing to start intermittently 116i

Post by Octavius » Thu Apr 19, 2018 11:03 pm

Next time the car doesn't start, if possible, try and jump start it using the terminals in the engine bay.
MY SIGNATURE STOPPED WORKING AFTER AN UPDATE.

AP1
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Re: cranking but failing to start intermittently 116i

Post by AP1 » Fri Apr 20, 2018 10:20 am

Read the fault memories. It’s probably a faulty injector/s or a faulty fuel rail low pressure sensor or both.

mark5211
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Re: cranking but failing to start intermittently 116i

Post by mark5211 » Sat Apr 21, 2018 5:25 pm

Hi, is your problem anything like the problem I'm having in this post,
(check the videos included in the first post):

http://www.babybmw.net/viewtopic.php?f= ... 2#p1295312

If it is then I've been trying to get it fixed for nearly 7 years now with no success.

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