Fuel Injector Problem??

i am a beginner when it comes to auto repair but tired of shady repair shops so i try to research and do as much as i can on my own. so...thanks for all your threads and picts. it has really helped.

my issue: 95 jimmy will not start after sitting. it took 40 cranks this morning to start! longer it sits, more cranks to start. with help of this site, i changed fuel regulator today ($43). it did not help at all- seems a bit worse to be honest. i had entire fuel injector spyder system changed 15-20k miles ago (ac delco part plus labor $500- i dont know if they changed nut kit).

when i opened manifold today there was gas sitting on left side (regulator side) and oil and a bit of gas mixed on right side (nut kit side). is this normal or should it be completely clean? also, is it possible that entire fuel injector system is bad again with less than 20K?!?!

could it be something other than injector related? fuel pressue is good as per mechanic. he thought it was regulator.

this truck is killing me. any suggestions apppreciated.

There should not be any raw fuel in the intake manifold! The regulator sends fuel via the CPI(Central Port Injector) or spyder to each injector. There is a poppet valve at the end of each injector line which provides fuel at pressure waiting for the injector to open so there is no delay. The intake manifold should handle only air, the injectors deliver the fuel directly to the cylinders. The intake may be dirty, black or dark brown, but no liquid. Any oily residue is probably the remnants of gas which has evaporated leaving only the heavier constituents. Any fuel in the manifold will foul up the O2 sensor system especially when one bank in the V6 is richer than the other.
Typically what happens is that the regulator leaks fuel into one side of the intake plenum which makes one set of cylinders rich and when the computer tries to lean out the mixture it leans out the other bank, not a recipe for smooth running.
Try EBay, I saw CPI units for sale which said they had new regulators which did not leak.
Why GM decided to put the fuel system in a dry intake system is beyond me, two many honchos hiring their out of work nephews into the engineering department. Get some wrench heads and do it right or we'll all be driving Hondas.

Sounds like your mechanic is just that... you need a technician to diagnose the problem. Check fuel pressure and leakdown... quick, easy and cheap test and will tell you immediately if there is a problem with fuel delivery. Ignition on, engine off, fuel pump running, pressure must be 60psi to 66psi. Pressure must remain above 55psi for 3 to 5 minutes after the fuel pump shuts off. Any questions, just ask.

Be careful with the guy on E-Bay. He sells the older replacement gm spider unit not the new revised one. the revised unit has metal injectors not plastic that warp. you need seal kit and a new bracket kit with the revised spider kit. should cost about $320 plus tax. check codes.