1988 Cadilac coupe deville 4.5l V8 problems

My car ran perfect until I went to a shop for an oil change and a tune up. I have fire and getting fuel. But will not turn over, please help. Fires but won't start.

Cranks over, but doesn't start? You have spark and fuel spraying out of the injectors?

Yep we have gas.

Something missing here, fuel spray when cranking and hot blue spark to the plugs, got to start if the engine has compression.

Changed the bad plugs and it will turn over with a foot of pedal to the floor. Feels like it won't exhaust right. Maybe oxygen censor?

Putting the gas pedal to the floor cuts off fuel delivery, won't even sputter? Again, you can see fuel spraying from the injectors?

Yep we are getting gas alright. It tries to shoot the gas into and out of the trans. We changed out some really foweled plugs. Maybe its the inline filter just put in gas for the first time in years about two weeks ago. It will start and shut off immediately after removing your foot from the gas. Thanks for your help so far...

PCV valve? It's also flooding gas into the carberator.

I'm lost here what carburetor?, it's tbi forget the pcv, how long did this car sit? You never said it shuts off after taking your foot of the gas, so it runs but will not idle, does it start right back up after stalling? What gas into the trans, what does that mean? How long has it been running after it sat for 2 years and then you had it tuned up then it is doing whatever it is doing now, it seems info comes in bits and pieces, if it was ok till you tuned it up, get it back to the shop.

Sorry about the wierd info. We are getting a diagnostic check tomorrow and if there is a problem the shop caused they will fix it. Thanks for your help. The injectors are spraying/dumping gas in massive volumes. instantly flooding the car. It will turn over for just a second and then dies. I guess its just sputtering. We have changed the computer twice and now to the shop I guess.

Much better description, bad fuel pressure regulator one possibility or burnt up pcm keeping the injectors on full, 2 possibilities.