My01chevy

Hey folks I just put in some long tube headers and ory. Its just a dog now. They tried tuning it up differently with HP tuner programming and a laptop. We got it less of a dog but still not alot of throttle response, hardly can spin the tires 5 feet. When i about got home the engine light came on and 4 oxygen sensor codes were read. I thought the shop did something with the sensors in the programming. Has anyone had any issues like this and how did they solve it. I need that nice clean throttle and acceleration i had before the install!

S8ER95Z

iTrader: (3)

Did they get the fronts plugged in the right place? I had my rear codes deleted and nothing was touched on the fronts.

TImmy_Jones

iTrader: (4)

Sounds like a tuning issue, normally I would guess burnt o2 wire, but if all 4 are messed up, they didn't tune the rear ones out and somehow really messed the front 2 up.

Did you check vacuum at idle? I would guess MAF or big vac leak.

RevGTO

iTrader: (12)

O2 codes are a way of life for many of us after a LT install. But you can get your car running right even without them functioning perfectly. Tuning the MAF and VE tables with a wideband is the way to get it done.

RPM WS6

iTrader: (3)

What sort of tuning did they do? Any decent tuner should have known to delete the rear O2s if you told them you had a ORY, so the tuner must've made a mistake (or wasn't aware of the ORY).

As for the fronts, what exactly is the code? If they aren't working right, get them replaced/wiring fixed and then get tuned again.

My01chevy

It was an HP tuning programing on his lap top. I had went back because of the ******* and he monitored it while i was driving. I guess when he flashed it again he didnt reset the rear o2 deletes but that doesnt explain the ******* from the fronts. I think i need a shop with more ls1 experience because he didnt understand why i wasnt pleased with the performance when it was clearly worse than when i brought it there and with long tube headers/ory/tuning it shouldnt get worse

DVS99TRANS

iTrader: (7)

Best take it to someone that 100% knows what they are doing. Just because this guy has HP Tuners doesnt mean he knows how to use it properly. He could have put a tune in your car that could really hurt your motor. Especially after dropping the coin on exhaust. Sorry to hear your problem but I wouldnt drive it until you can get it to a real tuner/shop fella. Check the sponsors>>> Would have alot more confidence in most of them. Look up Frost on here, I have heard he is pretty spot on and tunes are fairly cheap.

I8UR4RD

iTrader: (16)

its all in the tune. my tuner did not get them all the first time. went back and got the rest....no more lights. nice to drive without that light screaming at me.

udienow

iTrader: (18)

By tunning did he actually mess with fueling and stuff? Or was he just supposed to remove the codes? Turning off the codes should be an extremely simple affair. No report for the rear o2's, EGR and AIR. If he messed with anything else, have him flash it back to stock (i hope he saved a file before he did anything). Also what codes are you getting... maybe your front o2's are just simply bad....

mischief

iTrader: (1)

I had a bad o2 sensor code P0135 I believe, saying it was a slow sensor and other crap, I replaced it with a denso, and Now i get a code 1133, cleared, comes right back, tried a bosch, same thing, put denso back in.

Not sure why? it's a code for insufficient switching, do i have to live with this? or just get the code tuned out?

RevGTO

iTrader: (12)

In many if not most cases O2 sensors will throw codes with LT's because they are relocated too far downstream. I've been through what you're going through and ended up just tuning out the codes.

udienow

iTrader: (18)

Can you tune out the front o2's? I do not think you want to do that unless you are always running open loop, and have the appropriate tune for that.

RevGTO

iTrader: (12)

Yes, I actually did that for about a year. I got so sick of O2 codes and hassles, I tweaked the AFR tables and went full time open loop.

But that's not what I meant. I mean you just tune out the codes so they don't regsiter and your SES light doesn't come on.