P0090 - Fuel Pressure Regulator Control Circuit (SES, Pending, Current, History)
P0122 - Throttle/Pedal Position Sensor A Circuit Low (Current, Old)
P0193 - Fuel Rail Pressure Sensor A Circuit High (SES, Current, History)
P0223 - Throttle/Pedal Position Sensor/Switch B Circuit High (Current, Old)

Just started doing it out of the clear blue sky. Since I had a pile of new parts. I changed the complete fuel rail and HPFP as well as the gas pedel. nothing. Im assuming a bad wire but which one. Didnt change the TB but have a new one to try

 

sounds like you need HP tuners lol

 

I have it. Thats what I pulled the codes up with

 

Oh. Ask Chris zelinsky then. He’s on fb

 

Check the yellow wire that goes to the connector that plugs into the pump. Mine shorted to the fuel pump bracket. Threw it in limp mode, and rpd read no fuel pressure. It was pretty deep into the harness, so do a little digging.

 

gotta be something that would affect both the throttle and the fuel pressure sensor so i would say wiring harness as well. I have heard of the fuel pressure sensor wires rubbing through on lnfs.

 

The main harness loves to rub the HPFP black metal housing. Generally see Fuel pressure codes when it happens.

 

all thats left now is the TPS codes

 

Isn't that the sketchy tune guy?

 

He’s a tuner. The sketchy guy your referring to is matt Howe. He’s the one I thought was a pro cobalt builder lol. Turns out he’s ripped a lot of people off.

 

Its been a long time since Ive played with the lnf, I had the issue with the tps once when the solenoid that is on the turbo had a broken wire, I also had changed out the sensors and gas pedal and found the wire ended up being broke. Check it out.

 

Wow, you haven't been on here for awhile, how's the vette?

 

Hahah, yea been awhile, I got a pm the other day so figured I snoop around for a bit. Vettes good, don't drive it much anymore.