Hey everyone, new to this forum. I dont have a Z28 but i could REALLY use all the help i can get on my RS. I have a 1989 RS Camaro 305 TBI. The car sat for a year in the garage and i am back again trying to get it runnin again. I had a new fuel pump, filter, plugs, cap and rotor, and all that good stuff before it sat. Now i syphoned all the old gas out and put a new fuel filter in it to be safe. I also had the throttle body rebuilt and tuned. But i am not getting any fuel from the injectors. The noid lights show fire but im just getting the priming drops. If someone gets in the car and cranks it to start i can pour gas down the TBI and it purrs like a kitten, you can even slam the gas and the injectors shoot a beautiful cone to rev the engine just like it should. But when i stop pouring the injectors stumble as the car does and it dies. Fuel pump works, i disconnected a line at the TBI and aimed it at a bucket while cranking and it spits gas alright. I had a map code once but once i fixed a broken vacuum line that went away. I have no codes and no start. I was leaning towards Fuel pump relay or Oil pressure sending unit. If i get in and crank it it will eventually catch and start but it will stumble and die 3 seconds later. I know if the fuel pump relay is bad the OPSU will close the loop and run the fuel pump as long as there is 4psi in the oil. Or maybe a fuel pressure regulator? I don't know, sorry bout all the info. Any hints?

 

Clogged fuel filter maybe? Or I'd definitely check the fuel pressure regulator.

 

i think ur fuel pump relay is working fine because u said the fuel pump works when u disconnected it and routed it to a bucket
the oil pressure sending unit is just a bypass if the relay goes bad
when u go wide open throttle, the injectors alone supply enough fuel? or is it the excessive fuel that ur pouring down the throttle?

if the injectors are working fine under wot, then i would suspect the pcm
if you're pouring the gas at wot, then i would suspect a faulty injector, or faulty rebuild of the tbi unit

 

FINALLY got a fuel gauge on it today and didnt get enough pressure. Turned out the problem is the fuel pump strainer, clogged to high heck lol. I want to thank everyone for their help, much appreciation. I got ya'lls back if u need the help. THANKS!