Puzzled...

[Melissa Bracken]

I'm a bit puzzled. I recently purchased my 89 suburban. She ran fine for the first 3 days, then she started to sputter like she's starving for air or gas. We've replaced the air filter, fuel filter, and O2 sensor. The code we get is 44 (lean) but she smells like she's running rish. So I'm wondering what's next in line to check or how to rule out options so we don't dump a fortune into her unless its absolutely needed.

[Mikebtte]

I would check fuel pressure first. Good place to start on a TBI.

than it gets easier, sometimes a coolant sensor will go bad and cause it to try and run at the wrong temp, you can check that with an ohm meter.

[riverbanks]

Any luck? when did the code show up,at sputtering?and did you clear code after 02 replacement?