Since I assume that this is when the truck is in a shop and stationary the EGR would have nothing to do with it.

Is you truck completely stock?

What condition is you catalytic converter in?

Doing a tune up will only help if the stuff on the truck is not functioning properly.

Is you airfilter clean?

Is your plenum gasket blown?

Are your injectors operating properly?

 

I would think if the tube is broke and there is an exhaust leak before the O2, it's not getting the correct reading and fuel is being dumped into her.

 

wow, i NEVER knew that people tested 95 and older for emissions, and i was an inspector in MA

 

Very true. The exhaust leak needs to be fixed. Not to mention the possible massive vacuum leak into the intake if the EGR ever did open.

 

Not every state is MA, lol. Emissions testing varies widely. My truck has never had any emissions testing but I bet it would pass without an issue. Well sniff test not visual.

 

wisconsin used to test everything newer then 1969 on an in ground dyno. They would "road test" as they call it for anywhere from 3-10 minutes depending on the results. They just recently stopped doing that because it cost to much $$. They now only test 96 and newer because they are OBD2, and they can plug into the computer checking for codes. Here, if you reset your codes and take it in to test you will fail. you have to put something like 50 miles on after the codes cleared or battery disconnected before you can retest.

Matt

 

Not all WI. They don't test anything out in the country . Actually that is most likely a Milwaukee thing (maybe Madison too) due to the dense population.

 

You could always use one of those emission additives at the part store and cheat your way into passing marta. Ive known people to pass using similar methods.

 

very true. I live in Milwaukee. The 5 counties surrounding Milwaukee did this.

 

We're '75 and up here in OR...but only in the most heavily populated counties. Pre-OBD II get a sniff test, post get the codes run. They did a dyno test up 'til a few years ago, finally dropped that. It was fun to watch them try and figure out how to run an AWD car on a 2 wheel dyno...