I starting modding my car when the laws in my state (Mass) were a bit more lenient, but now I can't get a sticker to save my life because my car is a 1996 with an OBD 1 computer so when they plug it in it doesn't even read it and automatically fails it without even checking the emissions or anything. I was wondering what I can do with the PCM to help make the car pass (should I switch back to OBD 2 and does the PCM have the VIN # programmed into it?) I have cats on the car but have the EGR valve and smog pump removed and only drive it on nice days during the spring and summer so I'd like to get a legitimate sticker on it so I don't get hassled by the cops. Is there a way to program the computer to say that all that stuff is there and working properly? I'm not asking for help on circumventing the law, but I'd like to know what I have to do to my car short of returning it to stock due to emissions when I only drive it a handful of days a year. thanks

Myles

 

You'll need to go back to an OBD2 computer. Talk to a tuner familiar with emissions in your state about what you can deal with in programming vs. what you need to repair. Simplest thing is to reinstall the things you removed.

 

Damn............MA sucks now too!

 

I agree. The recent elimination of emissions testing for 96+ cars in MA and many other states does suck.

 

Ok, you definitely have to go back to the OBD2 computer. Once you have done so, the computer can be programmed to disable the EGR and air systems. I was able to do it with LT1_edit on my 96TA. While I did have the systems physically installed on the vehicle, the OBD2 tests were disabled in the PCM when I went for inspection. The car passed the OBD2 plugin test with no issues. Also the VIN is programmed into the PCM.

 

ok cool, so as long as I go back to the OBD2 and have my VIN # put in and disable the emission crap it should pass? sounds good to me.

 

It depends also what kind of regulations they have for OBD-II vehicles. In my state,for example, you are only allowed two "not ready" statuses in your PCM. If you have the EGR, rear 02s, AIR, EVAP, ect tuned out of the PCM, it leaves a "not ready" state. Unfortunatly, it is a little more complicated then just not having a visible SES light on the dash.

 

Yep... the "not ready" status is a big killer for most states. Some let you pass with 1 not ready, others allow 2, but I don't recall any allowing more than that.

a) go back to OBDII
b) reinstall the EGR (it helps cut down on knock and is easy to install/remove if you have anti-sieze on the studs.

That should do it. If you pulled the rear O2 sensors you'll need O2 simulators plugged into the harness and the codes turned off in the PCM (I belive you need both for ODBII cars to pass most tests).

misfire dect might give you problems depending on the cam/timing chain... some programs may let you turn that test off for "off road use only".