Noob needing help with 08 xb
 

Hello everyone on Scionlife!

So after hours of searching this site and everywhere else I need to post my problem for some advice. Here is everything I know.

2008 xb 5 speed
Had DTC's for p0351 (no signal from coil A ignitor)- dealer warrantied all 4 coils and fixed this code.

Then had code p0101 and p0102 (mass air flow performance and range) Replaced Mass Air flow.

Now I have codes for p0171 (lean bank 1). So I pulled spark plugs- White as can be- I took this as confirm system is lean. I sprayed every hose and connection I can see with ether, no vacuum leak found. When I view live data on generic scanner A/F sensor sits about 3.30 at idle and h02 sits at .8v. Short trim fuel at idle is 20 and long trim is 10-12. Off idle at about 2000 rpm or higher strm-8, ltrm-13. From what I can tell it looks like it has vacuum leak but for the life of me I can't find it anywhere.

I tried cleaning the Maf, no luck. ECT matches IAT when cold and reads 202 F when warm. Maf reads .08 lb/m koeo.

Anyone one have any advice or experience that will help?

Thanks

How long have you had the car, what mods have you made to it, and when did the problems start.

about 1 year, no mods, completely stock. I think it is the Mass air flow out of calibration, I just tried used one today. Lets see if the code comes back. I was informed of a new way to diagnose the MAF when out of calibration. If it is correct I will post the method and results.