Chevyss20001

I have lt headers and had the Bosch 13111s on my previous car so I decided to put a set on this one. When I installed them I fired it up and it would barely run, idle way low and multiple misfires. Put the old ones back in and it runs fine. Any ideas on what is going on?

JOHNNY59

iTrader: (398)

Bosch sucks, switched to Denso O2's and never had a problem.

95wannabe

iTrader: (20)

Anyone have an opinion on the NGK's?

Old Geezer

iTrader: (3)

1. If this is when the engine is cold, it doesn't use the O2's until closed loop temp is reached.
2. Different wire/pin location in the new sensor plug?
3. Data logs?

Ntoxicaytd

I'm assuming you deleted your rear 02s. Personally I repinned the harness so I could plug my stock sensors into the downstream plug. There's a few write ups on it around here