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Old 14th February 2007, 23:30   #1
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Default Car starting query

Hi All !!

I may sound very foolish but have this query.

This is regarding the modern MPFI petrol cars wherein after the ignition is turned ON the car is supposed to be started only after the hissss sound goes off after 3 - 4 secs of turning On the ignition.

I have noticed this in Santro Xing, Aveo and Zen MPFI.

Any idea why this wait ... bcoz even if you dont wait for those 3-4 secs the cars still start but is there any damage / disadvantage in that case ?

Cheers.
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Old 14th February 2007, 23:57   #2
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I dont think so if there is any compulsion. The sound you mentioned is of fuel pump and nothing else
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Old 15th February 2007, 00:26   #3
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In my Petra I am supposed to wait until the fuel pump indicator goes off, generally takes about the same time 4-5 secs. The engine starts even otherwise, but it was not suggested by dealer.

My own observation, the car felt weak if I do not wait for that long and turn ignition on right away.
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Old 15th February 2007, 00:38   #4
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Every time you start the engine the ECU performs a diagnostic check and once it indicates everything is fine you start the car to avoid any damage caused due to interrupting the engine check... Its more of a precautionary measure to give your ecu that time, nothing else however if you dont wait till the engine chk is complete and till it returns with a OK indication you are overlooking the error (if at all there is any) coz of which you might start n run the car while the ECU is indicating that something isnt right, now that has a potential to cause damage!

Last edited by The Wolf : 15th February 2007 at 00:41.
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Old 15th February 2007, 00:45   #5
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Quote:
Originally Posted by sreenivass View Post
In my Petra I am supposed to wait until the fuel pump indicator goes off, generally takes about the same time 4-5 secs. The engine starts even otherwise, but it was not suggested by dealer.

My own observation, the car felt weak if I do not wait for that long and turn ignition on right away.
------------------

Is yours a Petra Diesel ?
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Old 16th February 2007, 07:04   #6
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But my advice is to wait a few seconds before the morning start. Let the car do it's own POST(Power-On-Self-Test) !!!

It will be beneficial for the car in the long run.
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Old 16th February 2007, 08:03   #7
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It is always a safe practice and a good habit to wait for the fuel pump go come on and then start the car. After all what would one accomplish in this world in a matter of 3 or 4 seconds ?
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Old 16th February 2007, 09:48   #8
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It is better to let the fuel reach the carb/injectors before you crank, this would probably help in starting your car at the first crank itself.
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Old 16th February 2007, 12:04   #9
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I have Oel Corsa. The manual says that one should drive immediately without waiting. No need to wait for anything!
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Old 16th February 2007, 14:00   #10
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Hey, this delay also happens on my esteem 97 carb model...Is it supposed to have an ecu too???
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Old 16th February 2007, 14:22   #11
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Quote:
Originally Posted by cartech View Post
I have Oel Corsa. The manual says that one should drive immediately without waiting. No need to wait for anything!
The thread is talking about waiting before cranking the engine. You have already started your car !! so no need to wait
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Old 16th February 2007, 14:56   #12
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Quote:
Originally Posted by somebodystopme View Post
Hey, this delay also happens on my esteem 97 carb model...Is it supposed to have an ecu too???
Nope, no ECU. It has an automatic fuel pump which starts pumping the fuel as soon as you turn the ignition. if the fuel in the carb has evaporated, then the car will not start at first crank if you do not wait for the pump.
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Old 16th February 2007, 15:35   #13
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Default 1.6L Petrol

Quote:
Originally Posted by namit View Post
------------------

Is yours a Petra Diesel ?
It is not a diesel, it is a 1.6L Petrol.
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