Can I fool the emissions testing by converting my pcm to OBD2?

People convert their OBD2 to OBD1 all the time. Is it possible to convert to OBD2 and will that help so I dont have to take the sniffer test?

 

When they scan the OBDII cars, all emissions functions must be operational (including AIR, EGR, etc), otherwise you will go back on the dyno. Soon, the dyno will not be allowed for OBDII cars. If you fail the scan, you fail.

So it would be a good deal of work to convert an OBDI car to OBDII (and have all sensors work properly).

 

I guess my real question is does the inspector see that my car is a 95 and he automatically knows its OBD1, or does he scan the cars computer to see what version of computer it is?

 

My local station knew OBDII was for '96-up cars only. The ALDL connectors are different too if I remember correctly.

Do you have LT1 Edit? Maybe you can lean it out a touch before going for inspection if you're worried about passing a dyno test.

 

95's have OBD2 ALDL connectors supposedly. I have tunercat. I was just trying to see if I could find an easier way

 

California cars had OBD II in '95, but they're the only ones.

 

Just an FYI, the second chance dyno test for OBDII cars that fail the the plug in test is now history. Fail the plug in and you get a reject.

 

I heard that was coming. Modding an OBDII car gets worse and worse in this state.

 

Just make sure you get a tune from somebody...

 

Thats not the issue. I have LT1 Edit. You can't disable EGR or AIR, plus if you have a rowdy cam that triggers misfire, that would cause you to fail as well.

 

In tunercat under the ecm switch table, there is a box for egr and air. I thought that those disabled them LT1 edit should be similar...

 

That really blows about not having the sniffer if you fail the plug-in. Guess I'll have to figure out a way to get my crank pos sensor back on with the double roller timing chain.

The inspector just does what the RMV computer tells him to. They will not try the plug-in on your 95 even if the plug looks the same as the 96.

Also, disabling the tests in lt1-edit makes those tests not run. Therefore they show a permanent "not ready" status which will cause you to fail. I am not sure how many you can fail before you fail the test. In PA according to a document I read a few years back, you could not fail any continuous monitors (like misfire) but you could fail up to two intermittent monitors (like EGR or AIR) and still pass.

 

As soon as they punch in your vin the computer tells them what to do they can't just do a obdII test on your 95. As far as I know anyways wish I had more info for ya man.

 

Exactly. LT1 Edit allows you to disable pretty much any emissions monitor, but the inspection scan looks for those, as mentioned.

 

Good info guys. Looks like I'll have to build a stroker with a baby cam and max out the strim