Just picked this up and I want to bring it back to life. Slip and Tcs lights are on, what can be the issue with that? Also needs a good tune up

 

First I will change plugs and coils due to the missing and then start going thru entire car

 

Cats are clogged. What options I have for best results and Od light flash upon start up

 

The OD Flash can Mean a Few things. Scan the trans for Codes. I would also Check Charge Voltage. Make sure the alt and battery are in good health aswell.

I would buy cats and put them back on the car. The 3.5 will just shut down with a glogged cat. I have no recommendation other than to Not gut them. Its not a bad job to do. What is most important though is that the engine is in good running condition first.

 

Ok great I’ll start doing things and go through the car. First I’ll start with plugs, cats, and tune up

 

What are some things I should do to ensure reliability for a while. What about that idle air control valve mod so it doesn’t burn out something in the ecu?

 

So the cats weren’t clogged and I did a tune up but the car still misses at times. Yesterday the car kept bogging down and wouldn’t move. The car has no power down low and when I try WOT it won’t even redline etc

 

Can it be my mass air flow sensor ? Sometimes it idles smooth then other times it misses and sputters

 

The od light flashes upon start up can it be a trans issue

 

the lights being on could be many different things, could be as simple as a bad speed sensor could be the ABS module fried, you need to diagnose it (use a haynes manual) or bring it to a good mechanic

the low power issue could also be different things, what comes to mind right away is a bad/weak fuel pump or clogged/dirty fuel filter or fuel lines, could be a dirty/clogged air filter, some really basic stuff you need to check

did you take apart the throttle body and clean it ?