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When does the plug fire on start up?

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#1 carnut


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Posted 28 September 2008 - 05:04 PM

My 2004 Nissan 350Z takes about 2 revolutions to start. Once it starts, it is running, that is no missing or coughing. As I recall this is because some manufacturers like to see two revolutions to determine cam position before firing the engine. It is noticeable to me because my Taurus SHO fires right away. Comments?
Jay Kellogg

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Posted 28 September 2008 - 08:30 PM

As long as the car starts up, who cares? My Ford Escort used to take a while to fire up first thing in the morning, and fire up right away anytime later in the day. There also is a certain amount of bleed down fuel psi wise as a vehicle sits. It sometimes takes a few seconds for a fuel pump to pressurize the rails, the fuel to fill the injectors, and if there is carbon on the back sides of the intake valves, even more time. As long as one is not taking 30 seconds or longer to start, or the battery is almost going dead in the process, i think that would be normal.

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