2005 14L Series 60 Cutout test results

What was the baseline for those tests? What you're looking for is a minimum 0.2 increase from the baseline on each cylinder. Run 3 tests and average them,1 test isn't enough. From those #'s, cylinder 1 looks a little weak, but with only 1 test at idle,1 at 1000 and no baselines, it's just a guess.

In simple terms, the baseline represents the total fuel going through the injectors, when you cut a cylinder, total fuel increases to push a dead cylinder, so the # goes up. If the number doesn't change, or changes very little, that cylinder is dead or isn't doing much.

A failed cylinder on a cutout test does not mean a bad injector, it could be an injector, but not always. Check the valve/injector adjustment first and check the cam and rockers while you're doing it. S60's intake valves like to tighten up, if they're too tight, it can cause that cylinder to fail a cutout test.

 

There isn't a specific number for pass or fail, it depends on the baseline. If the baseline is 5.2, you look for at least 5.4 on for each cylinder. It is important to do more than 1 test, Detroit recommends 3 tests and average the numbers. If the engine does not control the fan, it need to be locked in, the air compressor should also be unloaded and not come on during the test. Any load change on the engine during a test will skew the numbers.

With a 5.2 baseline, cylinders 1, 2, and 4 are suspect, but changing injectors with only 1 test could be an expensive mistake. The next step I'd take is verifying that there is no air in the fuel return line. It may be just injector seals, possibly injector cups. It's very possible that the new injector is faulty, but I'd be checking everything before I just assumed that.

 

I'm wondering if your sputtering is TPS related. Any codes?