UPDATE
This is crazy but I think I have a leaking injector(s). I say "crazy" only because I just had these injectors cleaned and inspected for leakage (supposedly). That, and I also tried a brand new set of those Deatschwerks injectors and the problem was still there. Keep in mind the Deatschwerks injectors are a totally different nozzle design and haven't been on the market that long. So, to me, they aren't a proven piece.
As you may recall, my fuel pressure bleeds down to almost zero but never really quite bottoms out to zero...all within 30 minutes. I pulled plugs several times after fuel pressure bled off yesterday and number six piston carbon build-up looks 'moist' and plug comes out smelling like fuel...only for a second or two and then it dissipates. Kinda like one of those, "Did I smell fuel or just imagine it?" I even had my neighbor do the smell test and he thought the same thing too...smelled like fuel for a second, now it doesn't. Plugs looked dry...but the fuel has got to be going somewhere right? So, I grab my vise-grips...the ones that have the long parallel jaws and fab up a makeshift hose clamp off tool out of some spare hose. Clamped the feed AND return lines off right at the frame under the power steering pump and guess what? Pressure still bleeds down at the same rate and I don't see any signs of external leakage anywhere in between. The only hole in the this new theory now is that I somehow failed to pinch off the lines tight enough with my makeshift clamp and fuel still was able to leak down into the tank due to a bad check pump check valve. But let me say, I pinched the hell out of those hoses and they looked squeezed shut to me. For now, I ordered some of those small clamps that are designed specifically for clamping off fuel lines to be completely sure.
FWIW, in the past two days, I pulled my cam sensor, reinstalled my old one for shits and giggles (I have at least one backup for every sensor on the car) and used the Caspers cap to play with the advancing/retarding of the sensor. I was able to turn the cap to the extreme CW and CCW and the car acted no different overall. This leaves me on the fence as to whether tweaking the cam sensor actually does anything to affect fueling. I'm leaning more toward it doing just the one job of telling the ECM where the #6 cylinder is...and that's it.
I'll update after the fuel line clamps come in. I would hate to be wrong and have three sets of perfectly good injectors, lol. However, the signs and symptoms of leaking injectors are there. Since the fuel pressure isn't dropping off immediately, perhaps the injector(s) are just barely hanging open, allowing fuel to weep out just enough to drip down and cause the startup issue. And maybe the injector cleaning company failed to spot a weeping injector(s) during testing.
This is crazy but I think I have a leaking injector(s). I say "crazy" only because I just had these injectors cleaned and inspected for leakage (supposedly). That, and I also tried a brand new set of those Deatschwerks injectors and the problem was still there. Keep in mind the Deatschwerks injectors are a totally different nozzle design and haven't been on the market that long. So, to me, they aren't a proven piece.
As you may recall, my fuel pressure bleeds down to almost zero but never really quite bottoms out to zero...all within 30 minutes. I pulled plugs several times after fuel pressure bled off yesterday and number six piston carbon build-up looks 'moist' and plug comes out smelling like fuel...only for a second or two and then it dissipates. Kinda like one of those, "Did I smell fuel or just imagine it?" I even had my neighbor do the smell test and he thought the same thing too...smelled like fuel for a second, now it doesn't. Plugs looked dry...but the fuel has got to be going somewhere right? So, I grab my vise-grips...the ones that have the long parallel jaws and fab up a makeshift hose clamp off tool out of some spare hose. Clamped the feed AND return lines off right at the frame under the power steering pump and guess what? Pressure still bleeds down at the same rate and I don't see any signs of external leakage anywhere in between. The only hole in the this new theory now is that I somehow failed to pinch off the lines tight enough with my makeshift clamp and fuel still was able to leak down into the tank due to a bad check pump check valve. But let me say, I pinched the hell out of those hoses and they looked squeezed shut to me. For now, I ordered some of those small clamps that are designed specifically for clamping off fuel lines to be completely sure.
FWIW, in the past two days, I pulled my cam sensor, reinstalled my old one for shits and giggles (I have at least one backup for every sensor on the car) and used the Caspers cap to play with the advancing/retarding of the sensor. I was able to turn the cap to the extreme CW and CCW and the car acted no different overall. This leaves me on the fence as to whether tweaking the cam sensor actually does anything to affect fueling. I'm leaning more toward it doing just the one job of telling the ECM where the #6 cylinder is...and that's it.
I'll update after the fuel line clamps come in. I would hate to be wrong and have three sets of perfectly good injectors, lol. However, the signs and symptoms of leaking injectors are there. Since the fuel pressure isn't dropping off immediately, perhaps the injector(s) are just barely hanging open, allowing fuel to weep out just enough to drip down and cause the startup issue. And maybe the injector cleaning company failed to spot a weeping injector(s) during testing.
