so I really have no idea where to go with this problem, car takes numerous tries before i can get it started and has recently gotten worse. Starter works, battery's good, new ignition coil, wiring, sparks, dist cap, fuel filter, cleaned throttle body and isv. It runs fine once started (aside from the 8v normal idle issues). So turning the key, engine turns over but doesn't start, and today, when I got it started, it kinda sputtered and died again, I eventually got her started but would like to try to alleviate this problem seeing as it's my daily driver. any suggestions??? fuel related??
o2 sensor - month and a half ago, coolant temp sensor - a month ago, and fuel filter around 3 weeks ago.... hence my frustration, i'm planning a swap in the near future, so this problem won't kill me, just irritating
Check the in-tank pump for flow and check the fuel pressure at the fuel rail. Your FLAPS will let you borrow or rent a fuel pressure gauge. There are also a couple of check valves in the fuel system. Unfortunately, the check valve is not replaceable on the the Digifant pump. The other check valve is in the fuel pressure regulator. If pressure is not maintained on the fuel system for a time after shut down you might be experiencing vapor lock. FR
Just adding to this post for the archives, as it seems to be resolved, but I was having similar problems that got worse over a year's time. Car used to start quick every time, but got harder and harder to start. Plenty of crank, but I eventually had to floor it to get it to start. Once started it was fine.
I replaced many of the things the OP did - fuel filter, blue top sensor, black temp sensor, o2 sensor, etc. It eventually seemed to me to be a fuel issue, so I took off the intake boot and had another look around. The vacuum line going to the side of the airbox had fuel in it, and I remember Fat Rabbit saying in a post it could be a sign of a bad FPR. There is a diaphram inside the FPR that deteriorates over time and won't hold the gas pressure needed to start (there or the check valve in the rear fuel assembly). The FPR was cheaper than the rear fuel assembly, so I got a new one and it took care of the problem.
Also of note - I replaced all my vacuum lines around the throttle body, and one (there are two) in back behind the TB was very loose - I'm sure that didn't help!
sorry, took way too long to get around to it, problem was resolved as you described, couple new vacuum lines to the TB and still had the starting problem, finally replaced the FPR about a week ago and voila, starts up like a champ.