skysteve

Any responses???????

skysteve

still waiting....................

Sleepybear

I'm having the same problem with my 94 Chevy 5.7. I keep thinking that maybe the fuel pressure regulator is sticking up possibly. I also was leaning toward ignition coil getting worn out. That is the only problem with these types of issues, there are so many possibilities. I also was thinking about it, we have been on quite a tight budget for a while and run the tank low constantly Wich could cause the pump to wear out. I think I remember replacing the fuel pump a few years back but im quite certain it was a working fuel pump from a 09 Chevy cobalt and the psi is like 55-60 psi and the 94 GMC only uses 9-13 psi. Hadn't had any issues for a long time with it so I'm just wondering if this is my problem. Doesn't the fuel pressure regulator basically regulate the pressure to injectors and send back any unburnt fuel back to the tank
​​​​​. I decided to get a new fuel pump that wasn't to expensive so I suppose trying one that is made for the vehicle is worth a shot. The plugs have a few little black marks so it seems like it could be that it is getting to much fuel, the fuel mileage has been horrible lately. If anyone has any thoughts or input let me know.

Rednucleus

How many miles on your '94? When was a last full tune - plugs, wires, cap, rotor, fuel & air filter??