With the greatest possible respect, facebook groups are not exactly where
I would go looking for informed opinion on mechanical woes. Internet diagnosis
is is a sketchy business at best, but you can sway the odds in your favour by
directing your questions (as you have done) to the intelligent, handsome, well
groomed and mechanically savvy members of forums such as Club4AG
At idle an engine is consuming minimum air and minimum fuel. Intake velocity
is low and fuel atomisation is poor. This leads to unfavourable conditions for
combustion, particularly when the engine is cold. When the engine is cold the
ECU adds extra fuel and a lot of this will condense on the walls of the intake
runners and some will enter the cylinders as liquid rather than as a mist.
All of this causes an unstable fuel mixture to reach the cylinders causing varying
combustion conditions between the cylinders. As the engine warms up conditions
improve with better fuel vaporization and distribution. So you can expect a fully
warmed up engine to idle more smoothly than a cold engine. Looking at your video
clip you have high oil pressure and low temperature, so I guess that your engine
had only been running for a few minutes ? The mixture was most likely rich.
1. Post a clip when the engine is idling after you have been for brisk drive.
2. What did the old plugs look like when you pulled them out ?
3. Have you checked the cam belt tension ?
4. Have you checked the ignition timing ?
5. Have you checked the adjustment of the TPS IDL switch ?
True misfiring is most likely to occur when the engine is under load such as
accelerating hard in 4th up a long uphill grade with your best g/f in the passenger
seat. If it can do that smoothly without missing, then there is nothing wrong
with any of the basics.
Cheers... jondee86