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Originally Posted by e36mikee
Did you ever fix this? Also chasing a similar issue. I noticed it after changing injectors, but then realized my fuel rail hoses were leaking. After then changing that and then changing o rings on injectors it seems to still be happening albeit under slightly different conditions. It sseems to only leakdown pressure after cars hot and initially after shutoff and reprime it holds pressure really well until about 1 hour after shutoff in which it bleeds down to 0 in a few hours. If i restart it seems to run fine and doesnt seem like injectors , as they are also new. They for sure dont leak when its cold.
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So the thing I was looking to solve was long crank on cold start. And it turns out the fuel pressure leak down isn’t an issue. It would leak down and it was fine. It builds pressure really fast so the cold start low pressure leak down was not the root cause. It turned out to be a sensor thing. I want to say camshaft or crankshaft I can’t remember which one i kinda threw the kitchen sink at it until i got it solved. Basically the theory was it was taking a bit longer on cold star to sync the camshaft position.