Honda Car Forum

#1 (**permalink**) 20 Aug 2003, 04:56 pm

An intermittent problem will "work fine" when whatever is failing is also
working fine. When the car won't start is when you need to check things
like ignition, fuel supply, etc etc.

"Mickey" <mmmh@mmmmh.com> wrote in message
news:bi0k2s$abf$1@garrison.globalnet.hr...
> I'll describe what I think is happening to my car and
> I would like for anyone who has more informations
> or sees somethink that he doesn't agree with to post
> it.
>
> Case is previously very well described in previous
> post called "Bad start in hot weather?".
>
> Thanx.
>
> 1. NOT Main Relay - I checked it with voltage (closing
> the relay contacts) and it was fine. Car starts great
> right away after beeing driven or some time afterwards.
> 2. NOT Ignition - Car works great when hot it starts great
> when engine is hot or cold, it doesn't hesitate, it doesn't
> stall, idling fine.
> 3. NOT Fuel Pump - Fuel pressure valve can be heard,
> no problems while driving.
> 4. NOT Sensors - After a second or two everything stabilizes
> idle becomes stabile, many of them I've checked, car
> starts fine in the morning when it is not so hot outside,
> starts ok shortly after car has been turned off.
> Engine coolant temperature sensor, Intake air temperature
> sensors are surely ok.
> 5. NOT Idle Air Control valve - After a second or two after it
> starts badly it stabilizes idle speed and it lowers it when
> engine warm's up (as it should), so it is working.
> ECM reports no trouble code.
>
>
> ===>>>> In my oppinion the cause of this behaviour could be:
> 1. Not enough fuel reaching cylinders in a few first cranks -
> This could be explained as I heard that in hot weather
> fuel evaporates in fuel lines because of high temperatures
> of those lines.
> 2. Not enough air reaching cylinders in a few first cranks -
> This theory could explain why car starts ok in same conditions
> (standing in hot weather for 2 hours after beeing driven) when
> beeing started with throttle pedal beeing pressed.
>
> My 1th theory doesn't explain why engine starts ok if throttle pedal
> was pressed while starting up?
> Also the 2nd theory doesn't explain why car starts ok when cold,
> what happens to evaporated fuel does it condense back?
>
> Any other theories?
> Any thoughts on my theories?
> Which theory do you like better?
>
> Thanx, in advance.
>
> It is the last try to find out what is wrong, I've spent too much time
> searching for problem already. In fact I have given up searching
> for the problem I now would only like to try to figure out what is
> realy happening.
>
>

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