Question about kawasaki VN 1500 Vulcan Classic Tourer - Fi Motorcycles

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Hard starting cranks along time, sometimes backfires when does start

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Backfiring is fuel in the exhaust due to over rich mixture (perhaps too much choke) or valve clearances too tight etc

Posted on Mar 18, 2011

  • rotax81 Mar 18, 2011

    could even simply be plugs... you dont state what bike it is?

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Posted on Jan 02, 2017

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6.8 V10 hard to start and backfires once I got it to start fuel pressure was 87psi at idle no codes im suspecting fuel pressure regulator?? Any ideas?


If its the fuel system it should not backfire. It could be out of time synchronous (ignition - crank sensor - belt). becareful!!! you could hurt it if you try to start it to many times.

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I'd have to make sure battery has a full charge and battery connections good. Sometimes if vehicle is hard to start, people run the battery down? We can't do any testing if battery is down. Use a digital mutimeter across battery posts, everything off. The generic spec for a full charge is around 12.6 volts. Leave the meter leads touching the battery posts, have helper turn key to crank, the reading shouldn't drop below 9 volts, That reading may vary a little from one vehicle to another. Some say 9.6 volts, some say ten, you get the picture.
How long since a tune-up? Any applicable trouble codes? Does it backfire out the exhaust or intake? I'd want to check fuel trims, see if anything shows up? As far as hydrostatic lock, pull the spark plugs, see if any fluid comes out?

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1996 Olds Aurora will not start.


It could be many things, heres a list of basics you could check.
  1. wore or lose drive belt
  2. bad alternator
  3. bad battery
  4. clogged fuel filter
  5. bad fuel pump
  6. clogged fuel injectors
  7. faulty spark plugs or spark plug wires
  8. check the timing
  9. faulty ignition coil
  10. clogged air filter
  11. battery terminal connections loose or corroded.

Mar 06, 2009 | 1996 Oldsmobile Aurora

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1989 park avenue would run about 60 miles then die, could restart immediately, but would go about 4 to 10 miles then die again, could restart immediately but would repeat the 4 to 10 mile thing. A couple...


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