Hey guys I haven't posted a lot on here but i check into the forum weekly. Well its the time of the year for emissions. My 96 t100 4x4 has a check engine light on and I have till next wed to figure something out with it. Of course I wait till the last second. I got the truck scanned and it came back with this:

p0171 - Fuel system to lean
p0100 - Mass air flow circuit
p0110 - Intake air temp sensor circuit

Any help is appreciated. I'm guessing it a mafs but let me know what you think The truck has 434,xxx miles on the original motor. I would love to keep this thing running as best as possible. Thanks. You can contact me at 6154060124 if you would like.

 

So, instead of just guessing what have you done for diagnostics per FSM?
Ground wires clean and tight? All vacuum hoses in good condition, tight, and in proper place?

You can search here for threads on those codes.

 

Ive checked all the vacuum lines and all the ground wires are in the proper locations. The truck is bone stock, it has never been messed with. I understand stuff can go wrong especially with the mileage it has. I haven't found a place to download a fsm for it. I'm mainly just wondering if anyone has had these same codes ?

 

Yes, others have had these same codes.
Use FSM link in my signature to get an archived copy.