Legionofon

Ok so a while back I had some serious issues with my LS and sent it to Lexus of Shreveport to get it fixed, it was a issue with the ignition and I needed recommended 90k maintenance anyway I know the cats were glowing hot one day after I drove it and I'm pretty sure it melted the cats down and ruined them, I smell gas in my exhaust and my powers down a lot even after the repair. What issues would I have on a 93 with removing the cats? is there a test tube kit? Do I need a O2 faker? In return for your assistance I will try my best to get my boss to let me run my car on the dyno at our shop and post some dyno sheets for a 17 year old car!

LiCelsior

iTrader: (32)

search dude searchhhhhhh, theres a few ppl who have done it.

Legionofon

man I suck at search, I found one guy with a 90 but that's a series one so I guessed it was different... I promise to do a good tutorial if I get the info needed! It seems that all the answers are randomly buried in threads, If I do a project from a answer I got I find it easiest to just do a write up as a thank you to the forum.

PureDrifter

iTrader: (10)

your 93 is also a "series one" LS400. both are UCF1x chassis cars...

Legionofon

ahhh kay, thought there was significant changes between the 90-92 and 93-94, I guess I understand so its kinda like 4th gen Camaros... LT-1 and LS-1 Camaros are radically different but still called 4th gens...

PureDrifter

iTrader: (10)

there were not any super significant changes between 90-92 and 93-94. same motor, same chassis, same suspension, same interior. the only BIG differences were the wheels, front brake calipers, and other relatively small changes. almost every mechanical piece can be interchanged.

'95 heralded the series 2 LS, UCF2x chassis, which ran from 95-00. the 98-00 were technically the UCF20 Post Minor Change cars, not a whole different series (technically).

Legionofon

Good well those cats are coming off! hopefully I will get good results, I'm hoping for 150-175 on the chassis dyno (our dyno reads on the low side)!! Will post dyno results and chart if my boss allows!

Legionofon

uggg, cats are off, damn things are hell to get off, takes a impact to loosen the nuts off the header studs, anyway i had to pull 3 studs (one i had to drill out because it kept snapping off) you have to heat those things cherry red to get them off uggg it was evil, re threaded 3 of the other studs and used bolts for the other 3 and now I have a small exhaust leak o joy! but other than that they are off and man it runs nice now!

pearl93'ls

Did you just replace it with straight pipe...I have entertained doing this myself...But I dont want it to be noisy at all