P0171 Freeze Frame Data inside
 

About two weeks ago this code started to pop up.
I have checked for vacuum leaks, fuel pressure and exhaust leak.
Cant find anything. But I got a freeze frame log the last time it lighted up.
I see that everybody says to clean the MAF, but this year dont have a MAF.

Maybe you guys can read more to this then I can:


http://www.katherine-kelly.com/winchester/ChevyS10.pdf

It's uploaded to my wifes web account, and it was checked with Norton
Antivirus before uploading, so there are NO risk downloading the PDF file!


Hope to get some answers to what to try next :)


Happy New Year!

Ok, a little more has happens and I have some more info.
First of it's a CPI.

Fuel Pressure:
Key On, Pump On - 58-60psi
KeyOn, Pump Off - 54-55psi
Running idle/costing - 48-50psi
Running wide open - 55-60psi

As far as I can see the pressure shouldn't be the problem, maybe then it's volume, not pressure.

But I did find a vacuum leak, but I don't know it that would do it.
It has a large vacuum leak inside the dash, one of the lines connecting to the selecter switch for the plasement of where the fan should blow.
I run with the radio on quite high, and never thought of looking for a vacuum leak inside the cab. But don't this vacuum line have a one way valve next to the brake booster? Would this be enough to make a lean condition?

Hoping for answers :) :)