Clubjazz - Honda Jazz & HR-V Forums
Honda Jazz Forums => Honda Jazz Mk1 2002-2008 => Topic started by: MaxFrames on April 02, 2017, 09:55:33 PM
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My 2004 Jazz has developed a serious, hope not terminal, problem.
When the engine is particularly hot (eg. yesterday after one hour in the freeway at 110-130 Kmh) and I switch it off (eg. yesterday I had to refill at a gas station), when I switch it back on the RPMs drop quickly, below 700, then the car accelerates by itself (as in an attempt to revive the engine...) then stalls. If I switch it on again, it does the same thing UNLESS I accelerate hard two or three times: then it gets back to normal (idling at about 700/800 rpm). If, at this point, I switch it off then back on again, it usually does not do that again.
It has been doing this for a few months, 6 or 7 times so far.
What can it be?
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Have you access to a code reader?
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Yes, I forgot to mention it. It's a cheap USB ECU interface, but the error codes log is clear and there are no pending errors either.
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I was going to list a whole bunch of valves/sensors that might be worth checking* but if it is code free then that indicates they are probably OK. Instead these are the listed idle speeds:
Idle speed without a load M/T in neutral 650±50 rpm(min-1) CVT in [N] or [P] position 750±50 rpm(min-1)
Fast idle speed M/T in neutral 1,500±200 rpm(min-1) CVT in [N] or [P] position 1,500±200 rpm(min-1)
There is an 'idle speed learn procedure' after a reset but that is just letting the car idle for 5 minutes or so when warm and shouldn't need to be repeated.
One other possibility is the throttle body itself, some people have cleaned theirs but I would hope that was not necessary.
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TG
IAC Idle air control valve
MAP Manifold Absolute Pressure
EGR Exhaust Gas Recirculation
.... etc.
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Dirty petrol/petrol filter perhaps; just clutching at straws. That probably wouldn't show up as an error.
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Is _any_ malfunctioning that involves the ECU or the sensors logged as a fault?
If so, then maybe it's a mechanical problem (filters or throttle).
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Hi !
Max, U can check ur MAP sensor. I had the same problem2 years ago. Had to change it and my jazzy works fine since then
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Hi! Can you tell me where this sensor is located?
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This page tells you about the MAP Manifold Absolute Pressure sensor http://www.hondafitjazz.com/engine_fuel_and_emissions.html (http://www.hondafitjazz.com/engine_fuel_and_emissions.html)
but it also details the IAC Idle Air Control valve.
MAP sensor:(http://www.autosensors.co.uk/112-large/manifold-absolute-pressure-map-sensor-0261230099.jpg)
IAC valve:(http://thumbs.ebaystatic.com/images/g/tjEAAOSwR0JUS00I/s-l225.jpg)