Hey guys sorry so long. I have been having trouble with getting my wideband to read on the computer. Last night I did a small run just to log the command AFR just to see and it showed a command AFR of 11.8 my wide band showed the same 16.5-17 AFR I am starting to suspect maybe my wideband is havring problems so I am working on rechecking all connections. Question is there a way to check the sensor it self to see if it is good or not? Thank you all again for the help

 

What wideband are you using?

 

the way i check my widebands is, i leave the wideband connected and get a rag full of fuel and put it around the sensor, if its reads 9 or 10 then it is functioning properly.

 

I am using a prosport wideband. Good trick with the gas rag. I will pull it out after work and test. Thank you guys again

 

if narrowbands are reading 25-30mv wot then it is lean. thats 3 sensors saying lean so i would go with lean... where are you taking fuel pressure?

also what other mods are on the truck?

 

Fuel pressure is taken from the service port on the rail. Spector intake and cat back exhaust. Other than that bone stock.

 

Have you cleaned the MAF lately? might be bad... do you have access to another one to try on it?

 

So I cleaned the maf before I went out to the driving range. WOT was jumping between 15.3-16 AFR. That is getting better so do you think the maf is to blame? I may have access to another maf I will find out if he would be ok with me using it.

 

Another way to find out is to disconnect the MAF signal wire and run it in speed density (can't just leave it unplugged cause the IAT sensor is in the MAF sensor) - I believe it is the yellow wire on most all of the trucks. If you search around, there is a procedure with pictures showing how to remove the signal wire from the plug...

 

A little update I desided to go over every system in search of the problem I did my compression test today all the numbers are in the 160s witch is a good thing but I found something interesting the driverside bank of plugs are all carbon fouled and the passanger bank looks like they are running hot. Now my wideband is on the passanger side header so why would one side be carbon fouled and the other side running hot. The driver side plugs also did have oil on then when pulled, valve seals maybe? I think Ivan getting closer to the problem.