Q: idle problem

[andrius7]

Hi to everyone

will try my luck in this forum

so, problem of my nbfl,. 1.6 is bad idle on cold engine, i have trouble code p0420, and i think i have power los, because my mx5 hardly can spin the wheels..
just noticed that my engine light gone from cluster, seller fault hopefully.. had leaking rad houses, replaced them, now i have leaking rad cap, will try to replace today after work..already replaced o2 rear sensor with bosch one..

http://www.youtube.com/watch?v=yFTgII0Tmsk

http://www.youtube.com/watch?v=m7x_4vKeGbQ

made few videos with my rpm on cold engine, as you can see rpm's falling from approx 1krpm to .500krpm

do you have any ideas?? because i'am desperate for now..

[djmattm]

hi and welcome! Just a quick search on google and your fault code seems to be related to the O2 sensor or the catalytic converter, or maybe an exhaust leak, try searching for a leak in your exhaust system pre-cat maybe that's the problem

[andrius7]

but do this obd code can influence bad idle?

[djmattm]

yes it can cause bad idle problems

[Slim]

The cat is stock or sport (100 or 200 cells) ?
P0420 mean inefficient catalyst. this error is given by the second o2 sensor.

Slim

[andrius7]

maybe i connected o2 sensor in a wrong way..
cat is stock i think