well i have a 350 TBI backed by a 700r4. now recently i replaced the o2 censor bc so much gas kept getting dumped in it would stall out after start up. but since i replaced it my check engine lite is off but now it runs crappy, im not talking crappy over time im talking like a flip of a switch. i figured it needed a tune up (havent got to it yet) but now today its just dieing. the idle is kinda rough and low(since o2 replace). and it just for the 1st time cut off while driving (instead of sitting at a stop light) but every time it shuts off it starts right back up. it doesnt always die, and infact it just started a few days ago. ideas? questions? tests? plz help this is my dd and i cant have this happening.

 

i have the same problem is it ideling at like 15 and like straight **** ?

 

DARKmj16, I would start by checking your plugs. A rich mixture burns more easily than a lean mixture. If your plugs are fouled then you could have picked up a missfire when you corrected the mixture. Likely not your only problem but it's a place to start.

 

its idleing at 550 and like striaght s***

ok would help explain the idleing but any one got ideas on why it keeps dieing out of the blue?

 

i turned my idle up i think i have a vacume probkem cause when i pull both of the hoses out it idles fine then when it goes back to normal it idles real rough and shakes alot

 

mines doesnt really shake to bad it just idles crappy but it idled fine before the o2 replacement.