Leines

So ive been at this now for a month trying to get my rx back and running.. i had codes p0172, p0300 p0302 p0304 p0306, ive went ahead and replaced the MAF sensor with new denso, both oil control valves with oem and also replaced the rear oxygen sensor with denso as well...
Truck seems to be running better now, however it just failed the emissions test... theres no engine light on, so it wasnt failed for that..... it failed because the emissions coming out the back werent right... this is a garage that my mechanic has used many times.. on trucks with leaks and the sort and they never give him a hard time.. so something has to be messed up....

Where do i start now??? front o2 sensors??? cat convertors?? im thinking the cats could have got fawked up because of the misfires etc.. as i did have to drive it for a few kms while it was being a **** box....


Any help greatly appreciated... mechanic will hook up to scanner tomorrow to try and get the numbers from the computer or something he said....

Cheers

hypervish

I agree, I think the misfires may have damaged the cats, and now they aren't working as well as they should be.

Do you know how much it failed by?

Leines

I didnt stop in and get the test results as i was running late from work... i couldnt believe that it failed... i was under the assumption that i could have run straight pipes on a 3.0L lexus and still pass the test... guess i was wrong... I assume your advice is that if the test was very close to use an additive or some premium gas before i get it tested??


There are two cats looking on ebay.... a front on a y pipe and a rear that can come with or without a resonator pipe... suggestions on if i need both or one? or how i go about telling?


Thanks Again