LS1TAUTO

iTrader: (1)

i dont know what im doing wrong i know everyone is tellin me to run buillet mufflers instead of the glass packs i have on.......im also runing two cats one hi flow one stock...and i also have both of the 2nd o2's in....is this why my car is still runing like it lost 30 horse instead of gain 30 horse???? check engine light is off but seems like the car isnt wanting to go, when i hit 5k its makes a poping sound and it doesnt shift right....i installed my tranny mount and still no change car idles wired seems like its got a miss when im lookin at the engine idle the engine kind of stalls for a quick second i have brand new spark plugs in, all the spark plug wires are nice and tight nothing is loose? i dont know what else to do?????

badss_02

iTrader: (2)

Start off by doing a single cat, (highflow)... Then take the glass packs off and put some good mufflers on it, glass packs are like the retarted child in the performance world. I would also run a h pipe in there somewhere too with a bung for tuning purposes.

LS1TAUTO

iTrader: (1)

So it seems like nobody on here knows what my problem is.......wow I just paid over 800 dollers for my exhuast and my car is runing like crap horrible

camarozl1

Can you post some pics of your setup? Also post your connections setup up for your 02's
Did it start doing it as soon as you replaced your exhaust?

mook99ta

iTrader: (3)

First off your running two different types of cats which could be messing with things. Pull your plugs out and make sure all of them are actually getting spark and none of them are fouled. Did you install headers or are you still running stock manifolds? It is also possible that your O2's are fouled but that usually sends a SES light to come on. Need alittle more info on you whole set up and I can try to lead you in the right direction.

pheer

iTrader: (3)

why would you run 2 cats like that?

BobDoLe

iTrader: (11)

do you still have the o2's plugged in before the cat?
when you mention one high flow cat and one stock, it sounds like a jerry rigged setup that could end being any of a million different things.

LS1TAUTO

iTrader: (1)

yes i am runing long tube headers theres a chance my o2's fouled but no ses light..........car feels like its bogging im taking it to my specialist tomorrow hopefully he will know wussup i can probably get some pics tomorrow and you guys can see whats going on thanks everybody for feedback its appreciated

camarozl1

When my friend and i were installing my lt's he had plugged the 02's in the wrong ones. Make sure you connected your 02's to the proper connection, my car also gad rough idle and backfired when they were connected wrong.

RPM WS6

iTrader: (3)

What parts exactly (everything) did you install just before this problem happened? If it was a full header/true dual install, there are several things that could be wrong.

How much of the work did you do yourself vs having a shop do it?

I'd go back over everything, checking plugs, plug wires, PCM wires (the ones that run right past the headers on the passenger side, sometimes they get burned after headers), and O2 sensors. I'd also try to get a scanner hooked up to look at misfires, fuel trims, TPS readings, etc.

We need more info on this one.....

teke184

iTrader: (5)

rear o2 sensors have no bearing on the running condition of the engine.

if you didn't plug the fronts in, or they are burned or not operating correctly it would explain the problem.

also could have a major exhaust leak up by the header flange.



pretty tough to diagnose when we have such little info. and just because the SES isn't on doesn't mean there isn't something wrong.

sscamaroburn02

iTrader: (14)

can we see some pics of what your setup looks like? maybe this will help to identify your issue.

badss_02

iTrader: (2)

It does sound like your front 2 o2's are maybe junk... From what you have explained though the exhaust system desperately needs some tlc... Start with what i told you and if that doesn't fix it then change out your o2's. You need to change it up anyway.

LS1TAUTO

iTrader: (1)

i forgot to tell u guys when i had my headers installed i had to run str8 header all the way to the muffler shop and also the driver side 1st o2 wasnt in the only o2 that was in was the passenger 1st..... the shop was about 4 miles from the friends house who had put the headers in for me.......u think that would be a problem?????

ss_slowmaro

You may have burned a plug wire?

streetassasin

iTrader: (30)

My guess would be the o2's since you ran open headers

LS1TAUTO

iTrader: (1)

dont u think check engine light would come on??????? also when i got to the muffler shop runing str8 headers he did my exhuast and i drove it around for a couple days with the driver side 1st o2 not plugged in becuase i was waiting for my o2 extension to come in from the ws6 store.....

teke184

iTrader: (5)

the o2 sensors are the heart of the EFI system.

you shouldn't have ******* been driving it untill you could plug them in.

YES your problems are likely due to your stupidity with the senors.


replace both sensors
clear the computer
see if it runs

01ssreda4

iTrader: (96)

bullets = glasspacks
glasspacks = bullets

same thing

teke184

iTrader: (5)

and switching won't affect how the car runs...just how it sounds