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killacreations
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2003 black Toyota Celica GT
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mississippi
Mar 27, 2:53pm - #136613 
running straight pipe

I took out my cats and now the injectors are firing to much. Has anyone else run into this problem?

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mastro543
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Mar 27, 4:42pm - #136614 
iM DOING THE SAME THING THIS WEEK AFTER I GET MY CAR BACK .. HOPE IT DOSENT DO THE SAME THING ... HOW MUCH DID YOU PAY?? DOES IT SOUND GOOD?? AND WILL THE EXESSIVE FIRING ALWAYS HAPPEN????




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NorwayGT
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Seattle, WA
Mar 27, 4:47pm - #136615 
i think you should put your cat back, and get a kazuma. or at least get a high flow cat


was....5speed with i/h/e
15.41 @ 89.30mph 2.282 60'

is....04 srt4 stock
13.936 100.15mph 2.177 60'
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shabu
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shabu
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Mar 27, 10:07pm - #136616 
there is only one cat on the 7th gen celica - do some searching, there is a way to fool the ecu into thinking the cat is still there

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AZZKIKR
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ATL GA
Mar 29, 7:14am - #136617 
the way to fool your ecu into thinking you still have a cat is to get what's called a "black box"...it mounts on your frame and you connect it to the wiring of the oxygen sensors that were with your cat (should be 1 before and 1 after)...you'll have to do a search, but they are made because I had one on the last vehicle I had...they work by telling your ecu that your o2 sensors are still there and working fine...hope this helps a little thumbsup

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trog2233
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Williamsport, PA
Mar 29, 7:15am - #136618 
Why would you take ur cat out? rofl ur not gonna get anything out of that

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VieTExchange
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2003 Super White Toyota Celica GT
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2003 Toyota Celica GT

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Louisiana
Mar 29, 10:23am - #136619 
i have a custom straight pipe wit a 5inch hayame exhaust there's no problem. in my opinion it gives it a more aggressive and fuller tone, especially wit an Intake.

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fastceli2001
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fastceli2001

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2001 Toyota Celica GT

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CT
Mar 29, 10:56am - #136620 
PLEASE leave the cat installed, its there for a purpose


a kid told me that celicas handle like crap... i laughed
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Speed4TheNeed
Caleb
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2000 Toyota Celica

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New Orleans, LA
Mar 29, 11:03am - #136621 
Originally Posted by fastceli2001
PLEASE leave the cat installed, its there for a purpose


it's there for emissions standards.

taking it off won't hurt your car one bit, just the environment rofl

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Speed4TheNeed
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Mar 29, 11:03am - #136622 
Originally Posted by trog2233
Why would you take ur cat out? rofl ur not gonna get anything out of that


i thought it helps a little bit (not much). i thought it reduced some backpressure when you take it out and thus increasing higher rpm whp?

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fastceli2001
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fastceli2001

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CT
Mar 29, 11:04am - #136623 
Originally Posted by sPeEd4tHeNeEd
Originally Posted by fastceli2001
PLEASE leave the cat installed, its there for a purpose


it's there for emissions standards.

taking it off won't hurt your car one bit, just the environment rofl
exactly. air quality is bad enough frown


a kid told me that celicas handle like crap... i laughed
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Lucky_317
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2000 Toyota Celica

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Fontana, CA
Mar 29, 11:05am - #136624 
we noticed the same thing. With the CAT off the car runs very rich. If you do not have something like the Power FC to tune the car I would NOT slap on a str8 pipe. it doesnt really do any good at all.


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Lucky_317
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Fontana, CA
Mar 29, 11:06am - #136625 
actually he had LESS whp then I did cause he had the str8 pipe.


Best 60' 1.959 best 1/4 - 13.7 @ 101mph
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VieTExchange
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Louisiana
Mar 29, 1:17pm - #136626 
Originally Posted by Lucky_317
we noticed the same thing. With the CAT off the car runs very rich. If you do not have something like the Power FC to tune the car I would NOT slap on a str8 pipe. it doesnt really do any good at all.


since i have a str8 pipe i should get a Power FC?

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shabu
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shabu
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Mar 29, 8:48pm - #136627 
Originally Posted by VieTExchange
5inch hayame exhaust

rolleyes

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killacreations
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2003 black Toyota Celica GT
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mississippi
Apr 3, 7:32pm - #136628 
i paid 150 for 2-1/2 madrel fabricated pipe to go to my tanabe super racing medallion

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Mizery_Machine
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Denham Springs, LA
Apr 3, 7:42pm - #136629 
Originally Posted by killacreations
i paid 150 for 2-1/2 madrel fabricated pipe to go to my tanabe super racing medallion


That is what I thought about doing. But everyone said it would not be worth the gains and I would loose some low-end torque. What are your thoughts?


Mizery loves company.
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killacreations
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mississippi
Apr 3, 7:51pm - #136630 
i havnt noticed any loss of torque.

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v3n0m
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Apr 3, 9:16pm - #136631 
keep on polluting our air having a loud ass exhaust, we need more people like you wave

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killacreations
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mississippi
Apr 3, 9:33pm - #136632 
we sure do dont we

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MptGlw69
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Apr 3, 10:11pm - #136633 
Originally Posted by v3n0m
keep on polluting our air having a loud ass exhaust, we need more people like you wave


Well your Tanabe isn't making it any better.

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v3n0m
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Apr 3, 10:14pm - #136634 
^ umm...it's 50 state legal, so it meets all the governments air quality restrictions. the cats are there for emissions and cutting back on the pollution tongue

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celicat23
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norway
Apr 4, 2:41am - #136635 
Pleeeease!! Ff people are so hung up about pollution, why don't they sell their car and ride the buss?

Loud is nice! smile

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killacreations
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killacreations
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mississippi
Apr 5, 5:29am - #136636 
CELICAT IS RIGHT GET RID OF YOUR CAR AND BY A BYCICLE.

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Speed4TheNeed
Caleb
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Apr 5, 6:05am - #136637 
Originally Posted by killacreations
i havnt noticed any loss of torque.


gains & losses that are minimal can't be noticed.

more than likely, driver bias (not hard #'s) is what you use as judgement.

for instance, i add a CAI (whoah, i feel the power!. not actually, you really just HEAR it..its only about a 3 whp gain so FEELing anything would be an amazing feet.)

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Speed4TheNeed
Caleb
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New Orleans, LA
Apr 5, 6:08am - #136638 
Originally Posted by killacreations
CELICAT IS RIGHT GET RID OF YOUR CAR AND BY A BYCICLE.


yes and no.

personally, i'm not much of a treehugger. i'm for drilling for oil & florida blah blah blah.

however, i think if you are to drive your celica on public roads, you have a civic duty to obey the emissions laws of those roads. if your state says 'no, don't drive with an emissions hazard sr8 pipe, then you shouldnt.

if you are on private property--thats all on you. but somehow i doubt all you will be driving on is private property

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SCOTT03
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SCOTT03
2000 Black Toyota Celica
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2000 Toyota Celica

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Buies Creek/Sanford, NC
Apr 5, 6:24am - #136639 
if ya wanna drive with a st8t pipe go at it, but please leave the cat on. Taking it out is not worth the hp. Lets keep the air clean. The noise from the pipe is between you and your cops. Its not like taking the cat is gonna make your car as fast as a corvette. gains are not worth the consequences


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Celicaracer18
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Celicaracer18

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1995 Toyota Celica ST

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Meridian, MS
Apr 5, 7:49am - #136640 
i'm getting str8 pipes as soon as my tips come in, but mainly because i'm getting a flame thrower

and in case no one noticed he's from MS, hence NO EMISSION LAWS and cops don't care about sound, there are tons of rednecks with there bug chevy V8s that loud as hell

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trog2233
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Apr 5, 7:55am - #136641 
Originally Posted by Celicaracer18
i'm getting str8 pipes as soon as my tips come in, but mainly because i'm getting a flame thrower

and in case no one noticed he's from MS, hence NO EMISSION LAWS and cops don't care about sound, there are tons of rednecks with there bug chevy V8s that loud as hell


OMG please tell ur ur kidding HAHAHHHAHAHAHAHAHAHAHA a flame thrower !!!!!!!!!!!!

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Toyota_Doc
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Apr 5, 8:49am - #136642 
Are you serious kid? one, with your flame thrower you will need a Fiberglass fire resistant rear bumper that will be a pretty penny. two, where do you plan on using it? at a stop light? rofl

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v3n0m
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Apr 5, 9:40am - #136643 
too much F&F in the kids head rofl tongue happywink

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Lucky_317
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Lucky_317

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Fontana, CA
Apr 5, 11:01am - #136644 
with out tuning you WILL un rich and be slower then you should be. but eh do a before/after dyno and let us know what really happens.


Best 60' 1.959 best 1/4 - 13.7 @ 101mph
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Mizery_Machine
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Denham Springs, LA
Apr 5, 1:20pm - #136645 
thatsfunnyFlame thrower

Edit: What do you call a bouncer at a gay bar?
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Mizery_Machine
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Apr 5, 1:22pm - #136646 
400 Posts! Wooo!


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Lucky_317
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Apr 5, 3:03pm - #136647 
lol look at all this whoring shame on you rofl


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silver
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California
Apr 5, 6:49pm - #136648 
Helping to destroy the air is not worth the .5hp you might gain. Please put the cat back, removing it only makes gains on high powered Turbo cars, where they are a major bottleneck (when you have a 3" exhaust, which you don't). Obviously, the only effect of removing it for you was causing the engine to run way rich, which is a negative.

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slidr
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slidr

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Saint Louis, MO
Apr 5, 6:54pm - #136649 
Originally Posted by silver

Helping to destroy the air is not worth the .5hp you might gain. Please put the cat back, removing it only makes gains on high powered Turbo cars, where they are a major bottleneck (when you have a 3" exhaust, which you don't). Obviously, the only effect of removing it for you was causing the engine to run way rich, which is a negative.


Wow. All of you people that are complaining that our cars with the cats off are destroying the environment. I figure that with it off, we are still putting out less pollution than Excursions and Escalades.


The way I figure it is that the world is going to hell in a hand basket anyways, and chances are, the world will end due to us blowing each other up, and not pollution in 500 or so years.

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v3n0m
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St. George, UT
Apr 6, 6:54am - #136650 
Excursions & Escalades do pollute more, but they can carry nine people, which means that three celicas have to be used to carry that many people, so it balances out.

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Celicaracer18
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Celicaracer18

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Meridian, MS
Apr 6, 7:13am - #136651 
Originally Posted by v3n0m
Excursions & Escalades do pollute more, but they can carry nine people, which means that three celicas have to be used to carry that many people, so it balances out.


not really because even though they can carry that many people, usually there is only 1 or 2

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Celicaracer18
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Meridian, MS
Apr 6, 7:20am - #136652 
Originally Posted by Toyota_Doc
Are you serious kid? one, with your flame thrower you will need a Fiberglass fire resistant rear bumper that will be a pretty penny. two, where do you plan on using it? at a stop light? rofl



One: it shoots flames away from the car not towards the bumper wave (my friend has one and the flames are no where near the bumper); and Two: no, usually in parking lots (and mabey when someone is riding my ass)

flame thrower doesn't shoot flames every time you start the car or shift like in the f&f, it's on call by reving the engine and pushing a button, and please don't associate flame throwers to F&F anymore, you act like thats where they started or thats where I got the idea, they have been on hotrods for years and thats where they started

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v3n0m
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Apr 6, 8:28am - #136653 
Doing it too often will ruin your engine.

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Illusive
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Illusive
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Southern California
Apr 6, 12:25pm - #136654 
test pipes aka straight pipes, will run rich on the stock ecu (which is bad)
and I actually lost quite a bit of power, compared to lucky.

once its tuned out with the pfc, the decreased backpressure will be a great help to the top end on the 2zz.

you will get a cel, and it will be because the sub 02 sensor (the second one on the exhaust line) will read incorrectly, and the cel is a simple check cat code.

This wont happen right away, the test cycle only runs when the ecu is at a constant rpm for a set amount of time, then it sees the sub 02's readings and throws the cel.

Split second does make a generic kit to fool the stock ecu that the sub 02 is working properly, and hence no cel, but with the pfc that wont happen smile


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Celicaracer18
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Celicaracer18

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Meridian, MS
Apr 6, 2:14pm - #136655 
i don't have to worry about that because i don't have a 2 O2 sensors or at least not that i can see, BTW i have a 6th gen thats why i am doing it

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mastro543
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mastro543

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Apr 6, 4:11pm - #136656 
Originally Posted by Celicaracer18

Originally Posted by Toyota_Doc

Are you serious kid? one, with your flame thrower you will need a Fiberglass fire resistant rear bumper that will be a pretty penny. two, where do you plan on using it? at a stop light? rofl



One: it shoots flames away from the car not towards the bumper wave (my friend has one and the flames are no where near the bumper); and Two: no, usually in parking lots (and mabey when someone is riding my ass)

flame thrower doesn't shoot flames every time you start the car or shift like in the f&f, it's on call by reving the engine and pushing a button, and please don't associate flame throwers to F&F anymore, you act like thats where they started or thats where I got the idea, they have been on hotrods for years and thats where they started


Flame throwers burn your back bumper i know a guy w. a celica by my neighborhood and all around his exhaust the rear bumper is all burnt off looks nasty but its ur car do w.e you please

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blueTRD
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2000 Spectra Blue Toyota Celica
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2000 Toyota Celica

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Winnipeg, MB
Apr 6, 11:27pm - #136657 
Originally Posted by Illusive
test pipes aka straight pipes, will run rich on the stock ecu (which is bad)
and I actually lost quite a bit of power, compared to lucky.

once its tuned out with the pfc, the decreased backpressure will be a great help to the top end on the 2zz.

you will get a cel, and it will be because the sub 02 sensor (the second one on the exhaust line) will read incorrectly, and the cel is a simple check cat code.

This wont happen right away, the test cycle only runs when the ecu is at a constant rpm for a set amount of time, then it sees the sub 02's readings and throws the cel.

Split second does make a generic kit to fool the stock ecu that the sub 02 is working properly, and hence no cel, but with the pfc that wont happen smile


i have a straight pipe, but the codes I pulled off were of multiple misfirings (which is currently under repair now). the PFC would eliminate the codes (if it's caused by the pipe)? and where can I find the thing to trick the ECU if I do decide on that route?

thanks,
mark

Joined: Nov 2002
Posts: 396
Illusive
Member
Illusive
Member

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Posts: 396
Southern California
Apr 6, 11:32pm - #136658 
Originally Posted by blueTRD
Originally Posted by Illusive
test pipes aka straight pipes, will run rich on the stock ecu (which is bad)
and I actually lost quite a bit of power, compared to lucky.

once its tuned out with the pfc, the decreased backpressure will be a great help to the top end on the 2zz.

you will get a cel, and it will be because the sub 02 sensor (the second one on the exhaust line) will read incorrectly, and the cel is a simple check cat code.

This wont happen right away, the test cycle only runs when the ecu is at a constant rpm for a set amount of time, then it sees the sub 02's readings and throws the cel.

Split second does make a generic kit to fool the stock ecu that the sub 02 is working properly, and hence no cel, but with the pfc that wont happen smile


i have a straight pipe, but the codes I pulled off were of multiple misfirings (which is currently under repair now). the PFC would eliminate the codes (if it's caused by the pipe)? and where can I find the thing to trick the ECU if I do decide on that route?

thanks,
mark


the codes you were getting was another problem all together.

splitsecond has a website just too lazy to look it up.


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