Put new plugs in a few weeks ago, went back to the same rough idle condition. Checked plugs and sure enogh they are in the same condition as before. Cylinders 1,3,5 are fouled.

Is this an injector issue. How does batch injectors work. I'm thinking that these cylinders might be getting too much fuel thus fouling the plugs?

Ohmed out the injectors, heres what I have

1-10
3-13
5-17
7-16

2-17
4-10
6-17
8-16

 

The Injectors that are 10 Ohms are already out of spec, and the 13 ohm is on its way out.

 

Change your valve seals.

I had that problem on my truck. The plugs were fouling up so much, I would change them every 6 months and would have to add 2 liters of oil between oil changes. After changing the valve seals, the plugs don't foul up and the engine oil level stays on the full mark between oil changes.

 

rough idle, fouled plugs only on one side....?

C'mon guys! Intake manifold gasket!