p2196/98 codes

[luckychance]

car threw these two codes tonight. looked them up here but i dont think clearing them will fix it and people seem to recommend swapping out sensors and replacing them if i have to. so are these the front sensors or the back ones? pics of location to be sure?

also, i dont think clearing them will help because i definitely have an issue just trying to figure out if its tune related or mechanical. i just noticed about 2 days ago on idle my a/f gauge would dip really rich (10.3) and there would be a bog on light acceleration unless i would give it more gas then a/f would jump up to normal. also fuel pressure gauge would dip below 20 psi during this episode and them resume back to normal. is this something that i should be looking at the fuel pump failing or sensor (mechanical)? or is this a result of a tune as i switched back to my non meth tune about the same time?

 

[HooDee01]

I have the same problem going on and I'm also running meth, I just cleared the codes but I'm pretty sure we need to change the front 02 sensors. They are the ones closest to the headers on passenger and driver side. Passenger side is pretty easy but the drivers side is a pita if I recall

 

[luckychance]

thanks for the info hoodee01, apart from the running rich do u experience the same drop in pressue in fuel gauge? just wondering if its related. and would making it leaner tunewise help prevent this?

 

[HooDee01]

No fuel shows a steady 39 psi when I datalog driving just choppy afr