Clubjazz - Honda Jazz & HR-V Forums
Honda Jazz, HR-V & Hybrid Forums => Honda Jazz Mk1 2002-2008 => Topic started by: MaxFrames on April 02, 2017, 09:55:33 PM
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?
Have you access to a code reader?
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.
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.
IAC Idle air control valve
MAP Manifold Absolute Pressure
EGR Exhaust Gas Recirculation
Dirty petrol/petrol filter perhaps; just clutching at straws. That probably wouldn't show up as an error.
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).
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
Hi! Can you tell me where this sensor is located?
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.