No MAF

[kauser44]

Just started tuning on my own for this pulling season. Just got back from a test in tune and truck ran like poo. In the off season I put a different intake on and decided not to use the mafs. In my log file the the truck never commanded more than 10200psi of rail pressure. Question is does the default -40 degrree that the truck now reads cause this issue.(On an Lb7 mafs and iat are the same sensor)

 

[hymey]

Two of the wires that go two the maf are intake air temp wires, when u disconnect an IAT sensor it defaults to -40 deg. Look at a w/s manual to determine which wires to the maf are for the IAT, u can disconnect them and wire up a GM IAT sensor and plug from an early LS1 from a camaro , etc. Not sure about the rail pressure limit.

 

[IdahoRob]

You will be a lot happier in the long run to put the MAF back in.

 

[GANDJDIESEL]

We struggled for a year on two projects, trying to get them to run right. They would only build power to so many rpms and not the hp they should.
Wired a MAF back into both projects and RPM and HP came on.