Hello all
I'm having some issues with My burb.
Here's what's going on several months ago I got a sel code PO134 and changed all the O2 sensors but the code came back. so I replaced bank 1 sensor 1 again and the code returned. Now since the truck was running fine i Ignored it. Now when I go to start it in the morning it doesn't want to start right away and after trying for 10 to 20 minutes it will barely start and run rough stumbles and stalls and back fires. now all that having been said when i get in it in the afternoon to leave work it starts right up and runs fine i've chased the wiring to the O2 sensor and found no problems this is a real head scratcher for me as I've been working on cars my whole life has anyone else had this issue and if so what was the resolution and advice would be greatly appreciated
1998 Chevy K1500 Suburban
5.7 L

 

You have fuel pressure issues or issues with the fuel injectors. Check your pressures. If they are OK, you may as well update to the newer spider injectors.

 

Thanks I've pretty much come to the same conclusion thanks for the input will be looking into it next week when I'm off work.