It is a remarkable testament to humanity's narcissism that we know the number of books in the US Library of Congress on 1 February 2011 was 22,194,656, but cannot tell you -- to within an order-of-magnitude -- how many distinct species of plants and animals we share our world with, Lord May writes.
Engine misfires can be caused by a list of faults, but there are a few suspects that occur more than others. The primary villains are simple â spark or fuel â usually manifesting in spark plugs, plug wires, the coil(s) or the fuel-delivery system.
  A backfire is when the ignition of fuel doesn't take place in the ignition/combustion chamber, it(a backfire) can take place in the intake or exhaust. It can be caused b â¦ y a fuel to air ratio not being correct, also if the timing of the spark is not just right that could cause it to back fire. A large backfire is most likely caused by a bad spark plug or plug wire. Unburned air and fuel pumped into the exhaust will often be ignited by the other cylinders still â¦ burning exhaust gases.