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Why did my airbox explode when I bumped started my Beetle convertible?

Tiny
P.D.GALE
  • MEMBER
  • 2004 VOLKSWAGEN BEETLE
  • 70,000 MILES
The battery was flat and we bumped off the car in reverse. There was a loud bang and smoke poured out of the bonnet. On inpection the airbox had been damaged and the battery cover. I had to buy new parts and battery which came to £283

Regards Paul Gale
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Wednesday, October 19th, 2011 AT 8:56 PM

1 Reply

Tiny
MHPAUTOS
  • MECHANIC
  • 31,938 POSTS
If you tried to start with a poor battery the injectors will still inject fuel and poor coil voltage will not ignite the mixture, with the booster battery you have had a massive inlet back fire, this is the unburnt fuel laying in the manifold and igniting, I would say this has caused your damage, under normal running conditions this will not happen.
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Thursday, October 27th, 2011 AT 7:27 AM

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