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Shaking & shuddering - bad injector?
I have a 2005 F-350 with 210000km (135k miles) and this morning the minute she fired up I knew something was wrong. I had an important road trip planned which I couldn't cancel, so I drove 200+ miles today. Rough idle, shaking and shuddering when lugging below 2000rpm. If I'm cruising at 1500 rpm and try and gently step on it, the whole truck just shakes. Tow/haul helped a bit. Above 2000rpm it's not too bad.
I have a Scangauge and there are no codes, FICM is freshly rebuilt by Ed and voltage is 13.5, sometimes it drops to 13 and once in a while briefly to 12.5. The truck is stock except for a 40hp FICM tune, and EGR delete.
Have I lost an injector? Without throwing a code?