6G Celicas Forums

Yes, the O2 sensors need to heat up to work properly. If the sensor has three or more wires then it is a heated sensor(it has a heating element inside) and it should start reading alot quicker. But your engine is going to be running rich until it warms up anyways, it has to because a cold engine doesnt vaporize the fuel as well( so it needs more gas to compensate for the fuel not being fully burned).

What you are watching for is that the short term fuel trim will oscillate between rich and lean in relation to the long term. The short term trim is going to jump higher and lower than the long term trim and the O2 sensor should follow this pattern.
Every few seconds the computer will lean the short term trim, and wait for a response from the O2 sensor. The O2 sensor will notice the lean condition, and the ECU will adjust to a rich short term trim. Of course now the O2 sensor notices the rich condition, so the ECU compensates back to a lean trim. It goes back and forth like this constantly and the Long Term fuel trim will be an average of these readings, where the ECU determines the best AFR ratio is based upon how the engine reacts to the lean/rich adjustments every few seconds. If you arent getting any fluctuation from the short term trim then the ECU is just best guessing the AFR based upon factory programming. Could be a number of things- the O2 sensors arent working, the computer is locking itself out because it thinks some kind of damage is possible due to a scary sensor reading, or the computer thinks its at WOT and is trying to enrich the engine to compensate for the expected flow of air at WOT.

Ok thanks for thr info ill try an do that tonight or in the am so i dont make the neighbors mad lol

Well i think i figured out my problem an i feel super stupid an im not going to post what it is till i try it an see
But hopefully ill have a post full of good news around 1am tonight

Well, let's hope you're right. Await good news later.

bet he never plugged the rear bank O2 back in...LOL

How much you wanna bet on that lol

NO SH!T!!!!!


no for real.. if that is indeed the case! AHAHAHAHAHHAHAHAHAHAHAHAHHAHAHAHAHA!!!!! and AWESOME!!! at the same time!!! making it a simple fix.. hmm.. thought i seem to remember saying somthing about that.. b4 the FPR.... hmmmmm

Kurt, I'm dying right now! I know what is but I can't tell! I demand a 0-60 video tomorrow when she's ready to go hunting for some Mustangs

Well, here's to hoping that's it. So ready to see this thing pound some pavement.

hmmm yup!!!!!

but no, for real.. ima stop being an a$$ and am REALLY excited to here how she's doing, and that all is well.. fingers crossed and cant wait to here the progress!!!!

You fine mandrek but your also wrong lol
Daniel shhhh your the only one that knows lol

Lol the excitement is too much to handle, even though its not my car

Im gonna guess the front three plugs got changed and the back 3 didnt. Maybe the TPS sensor. Guess we will find out in a little while

Itll all be clear soon enough

I love knowing things even though ill feel super stupid when i admit what i did lol

OH NOES!!!!!!!! i thought for sure i had hit the bulls eye!!! OMG OMG OMG!!! what is, it what is, it what is it!?!?!?!?!?

Calm down ill post once i know 100% that im right in my thinking

The suspense is killing me!!!

Hmm, how do we coerce the information out of you?

One time I left a mirror on the extension tool thingy inside the valve cover of my 5sfe. Found all the peices of glass in my oil pan 2000 miles later.

My celica also set for a year because I left the ground wire on the back of the intake off.

Do you feel less stupid now?

i think were on the same level of stupid edy lol

Thats why im 'special ed'