and put in a flow 40 and heres the problem i'm not throwing a code because of the sensor, i just kinda wired it up underneath, its just idling really low and i was wondering if A. can i make some adjustments to make it run better or should i just put my cat back in

 

We need some vehicle info... year, 2or4wd? 2or3dr?

Post it in your signature (User CP > Edit Signature) and put it in there, that way you don't have to worry posting it every time.

 

whoops its always the simple things we forget isn't it, Um 2000 2 dr blazer 4.3L

 

Well, how was it running prior to the hack job?

 

well it has 149,000 miles on it so about as good as it should but i didnt have the really low idle and it seems to eat a little more gas, but i think thats because it doesnt have power at the low cruising idle and it needs more gas to get going lol idk

 

First, diagnose your fuel system.
96+ Fuel System Diagnosis

 

i just put the cat back on and changed the sensor after the cat drives WAY better with it

 

Glad it's running better. So many people remove their cat without realizing that modern cats do not restrict the exhaust flow anywhere near the amount that the early ones did. Plus, it's illegal in the U.S.

 

Check you injectors the may need replace had to to d it to mine it to mine. it leaks interal so you wont see anything on the ground

 

i changed out the spider like a year or two ago, but i have noticed a miss and was wondering if it could be an injector that quickly or if anyone had any ideas as to why