vortec if i remember right 52-60 psi is good. carb is around 6 while tbi is 12-15

 

So I finally got around to testing the fuel pressure. Its pretty much at 50 (+- 2) I read this is on the low side but should still be running. I've also had a trouble code pop up since last time: P0102 (Mass or Volume Air Flow Circuit Low Input). Wondering if maybe the MAF sensor has gone bad? I think this model the sensor is a frequency not a voltage sensor. Going to test that next. Is there anything else I'm missing or not thinking of? Just trying to cover all my bases before I have to drop the gas tank to change out the fuel pump.

 

If you have good pressure as tested I would not go after the pump; bet you have another problem. Please describe in detail what your problem was before you changed the regulator

 

 

So I reset the error codes and reset the computer by disconnecting the battery and grounding the cables. Re-connected them and started it up and got 2 error codes.

P0102 (Mass or Volume Air Flow Circuit Input) again
&
P0340 (Camshaft Position Sensor "A" Circuit.

Another thing I noticed is it sounds like the engine is trying to "suck" air into but can't get enough.

Any ideas are helpful
Thanks

 

on my 02 i was only getting around 20 psi when everything i was reading said it wouldnt run below 50. i replaced the fuel filter and the pressure jump 5 psi. im not sure if you have replaced the fuel filter but it wont hurt anything. and those codes can come from a dirty or poor connection.

 

I agree, The closer you can get to 60 PSI, the better. IMO, even the 52 PSI is a bit on the low side of things. Fuel filters are cheap and easy to replace..

 

Corrosion is a real issue, particularly where they still use road salt in winter. or ocean spray gets on the vehicle. Dielectric grease can really help in those conditions.
Sure its a pain unplugging connectors and applying it, but if it keeps the corrosion issues away from electrical connections, it's worth the time to do so. IMO.