Figure this out ??
Every morning only when the engine is could i have to crank the engine for couple seconds and than wait for about 7 seconds with the key in the on position and than it starts right up. If i try to started the first time and keep turnig the engine it will not start. When its hot it will start right up any clues ??
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by valve79 »</TD></TR><TR><TD CLASS="quote">Every morning only when the engine is could i have to crank the engine for couple seconds and than wait for about 7 seconds with the key in the on position and than it starts right up. If i try to started the first time and keep turnig the engine it will not start. When its hot it will start right up any clues ??</TD></TR></TABLE>
please use the search:
https://honda-tech.com/zerothread?id=1090573
it may not be the same car, but the same rules should apply
please use the search:
https://honda-tech.com/zerothread?id=1090573
it may not be the same car, but the same rules should apply
Sounds to me like a fuel pressure problem.
Here is my theory. When you crank the motor the battery voltage drops off just enough so that the fuel pump operation is affected. Tourque produced by an electric motor varies directly as the square of the applied voltage - take my word for it. This means that as little as a 20% drop in voltage means that the fuel pump motor will only produce about 0.8X0.8=0.64 or about 64% of the original tourque -translation means a weak fuel pump on startup nad no fuel pressure buildup.
Also the available CCA (or cold cranking amps) of any battery drops off greatly with temperature. The colder it gets the less juice the battery will give you. And the internal resistance of the battery ensures that a 500 to 600A draw on the battery when you start the car will ensure low voltage at the battery terminal.
Living in Ontario I know the importance of a good battery. If my engine won't crank and start properly at -20C than I know I have a bad battery. Any well tuned Honda with a good battery will start fine at -20C. Ask any Canadian in the know and they will say "Honda's don't need block heaters". I know since I have driven a Honda here in the great white north for over 20YRS.
How old is your battery? Most batterys only last 3 to 5 yrs.
Here is how to know for sure.
Before you start your car turn the ignition to the "on" position and wait about 5sec. The fuel pump should start normally (you will hear a whining noise near the fuel tank) and build pressure. Then try to start your car. If it starts right away (within 2 or 3 cranks) than u hav a low voltage problem caused by a bad battery.
In cold weather with a cold engine "boost" the cold battery from another car. The boost should keep the voltage up and ensure that your fuel system pressurizes normally while you "simultaneously" crank the starter. If it starts ok than you possibly have a bad battery.
If the battery you boosted from is new than disconnect your old battery and temporarily install the new battery in your car and try to start the car again. Allow enough time between start attempts for the fuel pressure to drop off. I don't have any idea how long this may take but I guess maybe 15 to 30 min's to be safe.
If the car starts ok than you definitely have a bad battery. If not, I would suspect you may be in need of a new fuel pump.
Another idea just occurred to me as well. The ignition wiring may be cutting out or disconnecting the fuel pump only when you engage the starter. This is pretty far fetched but it could also occur. You shove your key in and quickly turn past the "on" postion to the "start". The fuel pump gets a "blip" of power but builds no pressure in the fuel system until you move the key back to the on position. The pump then builds pressure and Voila' your car starts fine.
skiier
Here is my theory. When you crank the motor the battery voltage drops off just enough so that the fuel pump operation is affected. Tourque produced by an electric motor varies directly as the square of the applied voltage - take my word for it. This means that as little as a 20% drop in voltage means that the fuel pump motor will only produce about 0.8X0.8=0.64 or about 64% of the original tourque -translation means a weak fuel pump on startup nad no fuel pressure buildup.
Also the available CCA (or cold cranking amps) of any battery drops off greatly with temperature. The colder it gets the less juice the battery will give you. And the internal resistance of the battery ensures that a 500 to 600A draw on the battery when you start the car will ensure low voltage at the battery terminal.
Living in Ontario I know the importance of a good battery. If my engine won't crank and start properly at -20C than I know I have a bad battery. Any well tuned Honda with a good battery will start fine at -20C. Ask any Canadian in the know and they will say "Honda's don't need block heaters". I know since I have driven a Honda here in the great white north for over 20YRS.
How old is your battery? Most batterys only last 3 to 5 yrs.
Here is how to know for sure.
Before you start your car turn the ignition to the "on" position and wait about 5sec. The fuel pump should start normally (you will hear a whining noise near the fuel tank) and build pressure. Then try to start your car. If it starts right away (within 2 or 3 cranks) than u hav a low voltage problem caused by a bad battery.
In cold weather with a cold engine "boost" the cold battery from another car. The boost should keep the voltage up and ensure that your fuel system pressurizes normally while you "simultaneously" crank the starter. If it starts ok than you possibly have a bad battery.
If the battery you boosted from is new than disconnect your old battery and temporarily install the new battery in your car and try to start the car again. Allow enough time between start attempts for the fuel pressure to drop off. I don't have any idea how long this may take but I guess maybe 15 to 30 min's to be safe.
If the car starts ok than you definitely have a bad battery. If not, I would suspect you may be in need of a new fuel pump.
Another idea just occurred to me as well. The ignition wiring may be cutting out or disconnecting the fuel pump only when you engage the starter. This is pretty far fetched but it could also occur. You shove your key in and quickly turn past the "on" postion to the "start". The fuel pump gets a "blip" of power but builds no pressure in the fuel system until you move the key back to the on position. The pump then builds pressure and Voila' your car starts fine.
skiier
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Kongo69
Honda Civic (2001 - 2005)
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Jul 14, 2008 01:27 PM



