98 blazer
 

i got my blazer 3 months ago it stalled on my wife 3 times ! i put fuel injector cleaner in it an it has not done it since! Except yesterday It did stall once!!! Common sense tells me its a fuel issue idk im not a mechanic !! Should i change the fuel filter or tank an fuel pump ive just started back working so $ is tight an i could use some suggestions from u guys !And ive changed both o2 sensors an the truck still runs rough ive been told that the CAT could be causing the truck to run rough ???? It had a tuneup 3 months ago!!! Im looking for suggestions !! thanks

Start off with a fuel pressure and leakdown test. Go to autozone and rent a pressure gauge (you leave a deposit and get your money back when done) and hook it up to the schrader valve on the fuel line under the hood.

To do the test: turn key on but engine off! Initial psi should be around 60 with no leakdown during the first 10 minutes. Post back your psi numbers. Both the initial and how much leakdown and after how long.