silver1999z28

I have a 99 z28 just had a cam and tune done about 300 miles ago. I still have the stock y pipe with cats and o2 sensors there is no lights on the dash on and every time I take it to emissions they say " not enough ready codes available" so it dosent pass but dosent fail. All they say is to keep driving it. Does anybody know anything about this? Or how i can get it to pass? Thanks

jsteele90

iTrader: (13)

did u delete your egr and air? or did the tuner turn them off when he tuned it?

silver1999z28

I have no idea

silver1999z28

If I had to guess he turned them off

jsteele90

iTrader: (13)

thats why they arent ready then.

anotherreject04

iTrader: (4)

Are they saying the car hasnt been turned on and off or driven enough miles to test it? I thought when they scan it they are able to check those things, incase somebody had a dash light on and disconnected the battery to erase it before getting tested.

Make sure they dont suspend your tags, the test needs to be completed by the date on the notice.

silver1999z28

They keep telling me to drive the car for 7 days and five miles a day. They keep asking has the car been worked on..... the car hasn't been worked and no scanner has been put on it since the tune.....also before cam install car had just passed emissions from previous owner

silver1999z28

Battery hasn't been disconnected either

silver1999z28

Also The guy who tuned is saying there is no reason it shouldn't pass.

itsslow98

iTrader: (18)

I thoroughly hate MD emissions with a passion. Might want to try putting the tune back to stock and then reflashing it. There are readiness prompters in the computer that take some miles before they click over but usually by 50 miles your good. I have had that issue a few times and its annoying.

OnlyACamaroCanbeAZ28

Sometimes after a tune those ready codes can actually take up to 100 miles to reset but every vehicle seems to be a little bit different. if the tuner has not tuned out these codes as in deleted them basically they will show not ready for a set period of time. In Delaware I believe your allowed to have 1 Not ready (or it might be 2), not sure how Maryland works. My best advice is go hit a local highway and put about 20 miles on it, pull over and shut it off and let it sit for 3 or 4 minutes. Fire it back up and do the same thing about 4-5 times and see if the code becomes ready. I put almost 112 miles on my Camaro after RPM tuned it before everything in the system would show ready to go through emissions. Ive had some trucks do everything in about 60 miles though. I would verify with the tuner what he did though. Did the inspection place give you a paper showing which ones are unsupported, not ready, and ready for your car?

AKAFRED

iTrader: (1)

if you have an android device get a ELM 327 dongle (20$ ebay) and torque software (4$) this will tell you what readiness monitors are not set. so you can investigate further. my car never set the o2 readiness bits after a long-tube swap.

CTSVBiggie

iTrader: (1)

im surprised you are having an issue.

I have had catless cars pass. the V passed with cam and headers(high flow cats).

CorvetteCoop

I'm having the same problem on my car. I don't have cats and therefore the rear pair of O2s are disabled. I have sent my computer back to my tuner in hopes that something was turned off that shouldn’t have been. If that doesn’t work I'll be hooking it up to a scan tool as recommended above to see what's reading "not ready" and go from there.

CTSVBiggie

iTrader: (1)

on my one catless car. I used stacked spark plug defoulers on the 02 sensors. no tune, no problem.

Mike Morris

iTrader: (55)

My car has no cats and air etc are turned off. Passed a few months ago .

MdFormula350

iTrader: (4)

I changed my battery in december. I had emissions in feb, so i drove the car a few more times then normal, the system wasnt ready. I got an exetension till end of may, so i drove the car a few times and to ocean city spring cruise. went for the test and still not ready. I got an extension till the end june and the same thing, i just got back since my extension was till the 30th of this month and not ready still. something doesnt seem right......

I told them I dont see how driving it 7 days in a row does anything sepcial, why did that matter. I have driven it over 500 miles now and about 15 times since the battery being replaced. I have till sept now and walked out.

this was the first time I needed the replace the battery (original one finally went) but other than that no codes, ses, etc.. it has always passed since doing full exhaust, lid, and tuning back in 2007 or so.

MdFormula350

iTrader: (4)

bump, any ideas. I am starting to mind going there every month lol...

I did try some of the parts of the "drive cycle" but its hard to do that on public roads in the day time. thanks.

LS-ONE_DAY

My battery discharged from sitting for a few weeks without being started. I had to put it on a trickle charger for a while before it started up. I drove it like 10 miles and parked it. Couple weeks later I had to go to emissions. I drove the 14 miles to the emissions place and he hooked it up and said the monitors weren't ready and asked if the battery died or was changed recently, told him it had died and he gave me a 1 month extension and said to drive it normally for a week or two before coming back (apparently you can't come back within the next 7 days or they won't even try to test it). But I don't really drive the car so I expected it to not be ready again when the month was up after driving just 30 miles maybe over the next 3 weeks...but the monitors were good and it passed. This was at the Westminster VEIP btw.

There could be some kind of underlying electrical issue, but that is a field that is way out of my knowledge base. Try posting in the electrical section of the forum for starters.

Edit: I do know from my tuner that there are several states in the computer when tuning is being done. You can turn off codes or you can completely remove them from the checklist like they don't even exist IIRC. Perhaps your tuner made an error.

MdFormula350

iTrader: (4)

yeah not sure, i would assume since the tuner is very local that he used the way to keep it emissions workable especially since it passed 3 times before with no issues.

o well i will just drive the car when i do and try the test again before the next due date in Sept. As long as I dont have to pay for it each time i dont care, its just become a bother to go there every month and wasting gas.