2008 p0340

[OG-Lou]

Yes I made a mistake #1 & #4 spark plugs are light tan and #2 & #3 are whiter.

It is cooler today and the car bucks less when the engine is cold with the new spark plugs but the buck isn't eliminated when the engine RPM is under 1,200 RPM and the engine is warmed up. The bucking is always a low RPM event.

The whiter spark plugs in old cars indicates a lean mixture or an air leak. I haven't been able to see live data on my Innova 3120. I hope up-dating it causes it to work as new or maybe the Innova is too old to work on a 208 vehicle OR maybe that is why it was sold.

RE: compression test in the plans when I find a compression tester with a long hose that fits down in the spark plug wells. I assume one pulls the fuel pump relay and disables the ignition coil pack.

[avguy]

... RE: compression test in the plans when I find a compression tester with a long hose that fits down in the spark plug wells. I assume one pulls the fuel pump relay and disables the ignition coil pack.

I didn't bother disabling the coil pack. All I did was pull the fuel pump relay and then just let it stall out.