No codes so far but in Ontario they don't care if the SES light is on or not. 2005 was the first e-test for my truck and by then it only had the two rear cats. They put a sniffer up the pipe and test that way. Every two years we need an e-test to renew plates. I am due in May 09. I just found out that you can us an e-test that was done up to 12 months prior to plate renewal. That means that I can go and get it tested today and use that test to renew my plates. If it passes I am clear if not I have till May to fix it. I still want long tubes........

regards

Jean Marc Chartier

 

They still use a sniffer on OBD2 vehicles? Most places here only scan for codes, and it will not pass with a P1000.

If it's an idle-only test, you will still pass with some really toasted cats as long as the O2's are doing their job.

 

With a pro-charger, shouldn't you bump up to a 3" Y? That way -@ boost you can off that spent air pronto.

 

I don't know about Ontario, but here they just plug in the truck first, if it passes (I.E. no codes) then you are good to go. If you don't then they do a sniff test on rollers and run through a bunch speeds. If you pass that you are good to go, if not, they tell you that the vehicle need to go to a certified tech or you can do it yourself, but the test gets more involved. Mine passed the visual (because I have 2 cats) and passed the OBD II scan, so I was good to go.

Good Luck!

 

Something happened to your cats at one time.. I can't remember what it was, but you melted one didn't you ?

 

You sound like you're in the same predicament as myself. The Dynatechs are a better header but the price can't justify the added HP...I would rather dump that kind of cash for some 4:56 gears instead. I myself am going with the ebay OBX kit...since I live in Alberta we don't have emissions here but I think I will still go with a set of Magnaflow cats (why not, I already have them). For me, it's just a personal thing, I hate the smell of unscrubbed exhaust.

 

Good question. Dammit, now I have to look into this again. Thanks a bunch jbrew! While I am at it I added your name to my spell check dictionary. I am tired of always picking it up fro misspelling.....

Regards

Jean Marc Chartier

 

When I spell check yours, one of the cross references is "GMC"

So yea, your in my dictionary as well.

When we get famous, maybe we'll get in the Webster...Not sure how we'll be defined tho

 

Sure did. I think it was caused by a hard trip through the mountains pulling a 4 place sled trailer and 4 sleds with gear. I also thought it was possibly caused by my truck getting up to temp and then miss firing for longer than I should have let it due to a bad coil.

not sure but this is what one of them looked like. this was the second cat on the Passenger side. Strangely both pre-cats looked good.

 

Was that the same side you were misfiring on ? That would do it. Plus if your EGR valve is acting up, that will make matters worse.

 

Yeah it was the same side, My truck was really bad for the rear passenger plug well filling up with water. I tried di-electric grease, silicone, replaced the coil boot, you name it. Nothing seemed to help. So I just gave up muddin' and took the quad out when I wanted to get something dirty. I have never had any issues with my EGR valve, but I suppose I should take it off and clean it out, I have never done it. But it's starting to get cold outside and I don't have a shop or garage anymore.

 

Filling the chamber with water in the back (#4) is usually from those damn heater core lines. You can't tell if their leaking because they only leak at certain times under pressure. There is no visible signs of this. Coolant level stays the same because there isn't enough coolant leaked to make a difference in level. It's takes allot of time for it to make a difference there.

Coolant evaporates quickly and dicipates under heat conditions , therefore leaving no visible eveidence. BUT, the plug chambers will hold coolant for a period of time. This is purdy much the only way you can tell .

Well you have to real carefull cleaning the valve itself. Infact I wouldn't recommend it, just get a new one. The valve diaphram is easily compromized. What you can clean is the ports leading to, in the Plenum itself..

 

Thanks for the info Jbrew, I will just get a new valve, it's the original so it should be changed. I have to get under the hood tomorrow anyway to fix a idler bearing that's shot. I haven't had any issue with the plug well having any water (or Possibly coolant) in it for at least a year and a half now. One thing I've always liked about the truck is I did a coolant flush two days after I got it and never put a drop of coolant in it again till I flushed it last fall.

Sorry about the thread jacking JMC!:o