Looks like you need new 02's or at the least a new bank 2 02, id replace both
PO131 H025 LOW B1S1
PO151 HO25 LOW B2S1
my guess would be bank1 sensor1, bank2 sensor1, i believe sensor 1 is the the before the cat
im just guessing those are 02 codes the only thing that makes sense to me

 

Your small leak in the evap. system is nothing to worry about, Unless it's the line to your intake (not sure if that's where it goes on blazers). Most of them have a charcoal canister to vent fumes from the gas tank. The hoses get brittle and crack a lot. Voila!! Small leak. Gone through that with mom's dakota like four times now. Also, if it has less than 100k miles I believe it is the dealership has to fix emissions stuff gone bad, that is, if my memory serves me correctly. So, if all is as I think it is, they should fix your evap leak for you under warranty.

Hopes this helps explain the evap. code a little.

 

You guys gunna hate me BUT if you give it gas and the car falls on its face doesnt sound like a vacum leak that I ever known of. When you open the Trottle "then it now becomes the huge Vacum leak right there" unless there is enough gas to mix with the incoming air and make it into a burnable mix....else it will fall on its face and that my friends makes me think.... About the Oxygen sensors... that makes lotsa sense... If the sensors keep the puter from adding extra fuel for the additional air then the car "should fall on its face too"

Now I am not expert on this crapola, I am just opening my big mouth so dont take me out and shoot me..... Ok?


Marvin

 

hey i have a 96 Jimmy which is the same thing man and mine acted that way and it ended up being the MAF sensor was bad.

 

the reason I said to check fuel pressure

 

hummm, I wonder if I can try another MAF. Does anyone know if the one from my 94 Trans Am would be compatible?

 

Why dont you check out the 02s?

 

Haven't had time to have a look at them yet. But the temperature has gotten a lot milder lately and the Blazer has been doing a lot better, which leads me to believe that it's an air gas mixture problem.

 

I finaly got the Trans Am started!! But I'd really like to know why Te only thing that I did was disconnect the battery for about a day and then she started without a hitch!


Any ideas what caused this??

 

I found the cause of te problem, fuel pump. Changed it and the car runs great!