Clubjazz - Honda Jazz & HR-V Forums
Honda Jazz Forums => Honda Jazz Mk3 2015 - 2020 => Topic started by: BlueMonday on April 25, 2024, 06:31:43 PM
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I have had my Honda Jazz for almost 2 years and it has started straight away every time.
When I turn the ignition I do not need to depress the accelerator.
Last Sunday I needed to check the mileage and did not realise it could be done without starting the engine. You live and learn.
I started the engine, looked a the mileage and turned it straight off.
On Monday I went to start the car to go to work and it would not start, I tried a few times until the battery was getting low, then called the breakdown company.
An engineer came out in about 1 hour and said it was flooded, kept trying to start it until the battery was almost flat, sprayed something into the air filter (high octane?) and used his portable battery pack, had another go and eventually it did start.
He said that if I had left it for half an hour it would probably have started, but I had left it for 1 hour.
I think (and am most probably wrong) that me starting it up and turning it off straight away on Sunday caused the problem, and it had not reset by Monday. I would be interested to hear your thoughts on that.
It has been fine since but I am a bit concerned that it could happen again and I won't be able to start it.
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I'm far from an expert but I have never heard of a car with electronic fuel injection being 'flooded'.
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I have a Carb on my Morris Minor :o
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It happened to me once
If it happens again
Push the accelerator to the floor and crank the engine until it starts
By pushing the accelerator to the floor the engine will run leaner, that is why it will eventually start
Sent from my moto g(6) using Tapatalk
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You've discovered the need to know about the "Clear flood mode". Plenty of references on this forum, try this:
https://clubjazz.org/forum/index.php?topic=16193.0#msg137453
Frankly, your breakdown man was a muppet not to know about this.
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Thank-you for the helpful replies and the link.
So if it happens again, floor the throttle while cranking the engine.
My suspicion was correct about me causing the problem by starting the engine and turning it straight off again.
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It's not actually "flooded" (technically), rather the fuel enrichment used for cold starting results in some wet carbon which normally burns off in the first few seconds of normal running. Cranking fuelling and afterstart enrichment ramps off within a short time, something of the order of 10sec or so, and the combustion chamber will be hot enough to clear moisture and wet carbon after maybe 30sec.
The general guide is not to start and run an engine, especially from cold, for less than 30sec or preferably a minute.
In industry we did specific plug fouling tests consisting of repeated cold starts and stop cycles. We measured plug resistance and you can plot the trend and predict quite accurately how many cycles will lead to fouling. Our problems were mainly to do with the production and delivery practices of moving and shipping cars, there were many starts without the engine ever getting properly hot.
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If I ever need to do a very short move with a cold engine then I let the engine run for about a minute before switching it off to give the initial excess fuel time to clear.
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Rover 800i were bad for that.
No issues with Jazz: or Mark 1 Mini,
1973 Lotus Elan with twin DCOE45 Webers was very bad: (but the noise when it did start was gorgeous).
1947 Rover was fine.
1929 Riley 9 - manual choke with lever on steering wheel.. started first time after retarding ignition - another steering wheel lever!
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I’m one of the few people in my area who puts his car in the garage at night.
My usual practice in the morning, is to open garage doors, start engine and move out, (maybe 10 secs), stop engine, get out to close garage doors, back in car, start engine and drive off.
Total time maybe not much more than 30 sec, no issues with flooding at all. ;D