Hi,
I've bought a 2003 Jazz 1.4 i-DSi CVT with 105000 km a while back, with a misfire and can not get the misfire sorted. When it is idling there is no misfire, but as soon as you touch the petrol, it misfire whether in neutral or drive.
When pulling away from a stop, it misfire and hesitate, but from about 1500 Rpm the misfire seems to clear.
Fuel economy seems ok, 6,9 l/100 km around town and 5,3 L/100 km on the open road.

What was done since I bought it:
1. CVT service
2. Engine service (oil, filters and 8 new plugs)
3. 8 New coil packs
4. New petrol filter
5. Valve clearances adjusted
6. Injectors checked and professionally cleaned
7. Fuel pump delivery and pressure checked
8. Compression checked (Good)
9. Scanned for fault codes, none
10. EGR valve cleaned

Is there anything that I am missing?
Can anybody point me in a way to proceed?
I really like the little Honda, but it is driving me nuts, and I can not pass it on to someone with the problem.

 

Hi, don't know if this is too late to be helpful, but this page (nice South Africa connection) describes re-routing the wiring for the crankshaft position sensor, as interference on that line can confuse the PCM. Most commonly the problem is in combination with excessive ignition voltage due to worn plugs.

The work you've already done looks pretty comprehensive. I assume you're seeing no check engine light. Does the misfire behaviour change when the car is warmed up? If you're able to read OBD data, could you check things like the coolant and intake air temperatures, the throttle position and manifold pressure readings, and the fuel trims?

 

Sorry for necro but it might help somebody else.
Had this exact problem with GE6 Jazz.
What worked for me was to swap from Bosch Spark plugs to NGK Iridium.
Also the torque specified in the service manual for the spark plugs is too low.
27 N.m is the correct torque. Torque it dry.

The problem was driving me crazy but it got resolved simply by switching to NGK.