Emissions without EGR valve
- Thread starter wildphil
- Start date
TNPhoon
1of28
Re: Emissions without EGR valve
Emissions = Why mine is staying registered in a non-emissions county.
They don't do visual inspections here do they? Maybe they do? I dunno? Could be that all of the cars from the lot are post-whateveryear and just have the ODBII hookup, but I've never seen them actually pop a hood.
Emissions = Why mine is staying registered in a non-emissions county.
They don't do visual inspections here do they? Maybe they do? I dunno? Could be that all of the cars from the lot are post-whateveryear and just have the ODBII hookup, but I've never seen them actually pop a hood.
JKsSyclone
Active member
Re: Emissions without EGR valve
They'll only do a tailpipe "sniffer" test. You may have to cheat it through but it'll be fine Phil.
They'll only do a tailpipe "sniffer" test. You may have to cheat it through but it'll be fine Phil.
wildphil
I Love My Ty's
Re: Emissions without EGR valve
That's good then. There is no visual here. Just the tailpipe on vehicles 95 and older. Thank you sir.
That's good then. There is no visual here. Just the tailpipe on vehicles 95 and older. Thank you sir.
wildphil
I Love My Ty's
Re: Emissions without EGR valve
They may in other states. But in Tenn. they only plug into OBDII Vehicles.
They may in other states. But in Tenn. they only plug into OBDII Vehicles.
BeastMaster02
New member
Re: Emissions without EGR valve
EGR is only used for cruise to keep down temps in the cylinders.
EGR is only used for cruise to keep down temps in the cylinders.
AUSyTyIN
Unbusted $#it box
Re: Emissions without EGR valve
I've passed many visual inspections in Colo with plenty of reasons to fail. No cat/EGR on the Ty, no charcoal canister on the Omni, etc. How much does the guy at the place really know about what every engine was supposed to look like when it was new? Not very much...
I've passed many visual inspections in Colo with plenty of reasons to fail. No cat/EGR on the Ty, no charcoal canister on the Omni, etc. How much does the guy at the place really know about what every engine was supposed to look like when it was new? Not very much...
johnboy89
Member
Re: Emissions without EGR valve
RI is the same thing except that the test is a two speed idle test.
If you have the two speed test, but the EGR does the not come on, will it make a difference???? Or does the EGR only come on during load????
RI is the same thing except that the test is a two speed idle test.
If you have the two speed test, but the EGR does the not come on, will it make a difference???? Or does the EGR only come on during load????
wildphil
I Love My Ty's
Audio Man
New member
Re: Emissions without EGR valve
Just went through all of this with my 92 Ty. Truck has no EGR and at the time had the original 1992 catalytic converter on it. In metro parts of GA (outside have no emissions testing) you only do the 2 speed idle test as there are no all wheel drive rollers for emissions testing so our trucks are exempt from going on the rollers. Note that the Sy and Ty trucks were NOT on the list of vehicles exempt from roller testing with the sniffer. I had to argue the point and show that the Olds Bravada was one it and we share the same AWD platform. Even then I had to prove it to the guy so he didn't end up with a $500.00 fine. It's called due diligence which he explained that if the state came back to him he had to be able to prove that I showed the truck to be what I said it was. I have an iPhone so I Googled it and showed him the truck on Wikipedia so he could tell the state to do the same if they had an issue.
Anyway, the truck would only pass the high speed idle test with the current cat on it. The low speed test showed about double the HC output allowable. I spent countless hours trying to figure out what it was not knowing the original cat was still on the truck. I just happened to be going through the same thing with my 1994 K1500 Blazer. After replacing everything on the truck but the cat and testing the same (failing) even with a brand new EGR system on it and new O2 sensor among a bunch of other things I did. I replaced the cats on both vehicles and passed no problem. The K1500 was on the rollers and tested flawlessly with the new cat. The Ty also tested perfectly with no EGR with a new cat. The new cat cost me $207.00. Basically my buddy who is a mechanic explained that with a new cat even a poorly running car/truck will pass because the cat catches all the bad stuff before it gets to the sniffer.
He kind of proved this when I replaced every damn thing on the K1500 but the cat and tested exactly the same every time. New: O2 sensor, EGR valve w/new EGR solenoid (cleaned the orifice tube well), 2 cans of Seafoam through it for carbon deposit removal, vacuum lines on top all replaced as I found a couple that were cracked and hardened, I did the plugs and O2 after the Seafoam was done, fresh Mobile One. None of this had any difference on the way the truck ran or tested. Only after the cat did it pass.
My Ty had new plugs, new Taylor wires, new MSD Ignition, new silicone vacuum lines, Seafoam cleaning, fresh Mobile One. It always passed the high speed idle test but would not pass the low speed no matter what..until I did the cat.
As for the visual, they didn't even know what that truck is much less where the EGR valve was. The guy didn't even lift the hood on it as he used the remote sensor to pick up the idle instead of using the thing that clips to the plug wire. He did look for a cat with the mirror, nothing more.
Hope this helps!
Just went through all of this with my 92 Ty. Truck has no EGR and at the time had the original 1992 catalytic converter on it. In metro parts of GA (outside have no emissions testing) you only do the 2 speed idle test as there are no all wheel drive rollers for emissions testing so our trucks are exempt from going on the rollers. Note that the Sy and Ty trucks were NOT on the list of vehicles exempt from roller testing with the sniffer. I had to argue the point and show that the Olds Bravada was one it and we share the same AWD platform. Even then I had to prove it to the guy so he didn't end up with a $500.00 fine. It's called due diligence which he explained that if the state came back to him he had to be able to prove that I showed the truck to be what I said it was. I have an iPhone so I Googled it and showed him the truck on Wikipedia so he could tell the state to do the same if they had an issue.
Anyway, the truck would only pass the high speed idle test with the current cat on it. The low speed test showed about double the HC output allowable. I spent countless hours trying to figure out what it was not knowing the original cat was still on the truck. I just happened to be going through the same thing with my 1994 K1500 Blazer. After replacing everything on the truck but the cat and testing the same (failing) even with a brand new EGR system on it and new O2 sensor among a bunch of other things I did. I replaced the cats on both vehicles and passed no problem. The K1500 was on the rollers and tested flawlessly with the new cat. The Ty also tested perfectly with no EGR with a new cat. The new cat cost me $207.00. Basically my buddy who is a mechanic explained that with a new cat even a poorly running car/truck will pass because the cat catches all the bad stuff before it gets to the sniffer.
He kind of proved this when I replaced every damn thing on the K1500 but the cat and tested exactly the same every time. New: O2 sensor, EGR valve w/new EGR solenoid (cleaned the orifice tube well), 2 cans of Seafoam through it for carbon deposit removal, vacuum lines on top all replaced as I found a couple that were cracked and hardened, I did the plugs and O2 after the Seafoam was done, fresh Mobile One. None of this had any difference on the way the truck ran or tested. Only after the cat did it pass.
My Ty had new plugs, new Taylor wires, new MSD Ignition, new silicone vacuum lines, Seafoam cleaning, fresh Mobile One. It always passed the high speed idle test but would not pass the low speed no matter what..until I did the cat.
As for the visual, they didn't even know what that truck is much less where the EGR valve was. The guy didn't even lift the hood on it as he used the remote sensor to pick up the idle instead of using the thing that clips to the plug wire. He did look for a cat with the mirror, nothing more.
Hope this helps!
wildphil
I Love My Ty's
Re: Emissions without EGR valve
That's a great post. Its probably going to help a lot of people in future emission trouble shooting.
At this time I was wondering about emission testing and the EGR.
But I do have trouble every year passing emissions with this truck. My other Typhoon passes easily. Everything has been replaced on this truck. Including the cat. But from the info you have posted. I guess it is possible that its defective. I will keep this in mind. Thanks
That's a great post. Its probably going to help a lot of people in future emission trouble shooting.
At this time I was wondering about emission testing and the EGR.
But I do have trouble every year passing emissions with this truck. My other Typhoon passes easily. Everything has been replaced on this truck. Including the cat. But from the info you have posted. I guess it is possible that its defective. I will keep this in mind. Thanks
Audio Man
New member
Re: Emissions without EGR valve
Also keep in mind, not all catalytic converters are created equal. Most aftermarket cats only last a couple of years. The stock and high performance converters are better. On my DD K1500 I spent $270.00 for the cat and install. They swore that it was a quality converter, we will see although it was a larger flat converter unlike the one that came out of it. The $207.00 got me a nice converter as well...it was at a different place though as it needed a drive on lift and the previous place did not have one so they couldn't do my Ty. Turned out the place I took the Ty to, I ended up knowing the guy so he cut me a break on the price.
I was told my several people that most aftermarket cats only last a couple of years so that may be the issue.
Also keep in mind, not all catalytic converters are created equal. Most aftermarket cats only last a couple of years. The stock and high performance converters are better. On my DD K1500 I spent $270.00 for the cat and install. They swore that it was a quality converter, we will see although it was a larger flat converter unlike the one that came out of it. The $207.00 got me a nice converter as well...it was at a different place though as it needed a drive on lift and the previous place did not have one so they couldn't do my Ty. Turned out the place I took the Ty to, I ended up knowing the guy so he cut me a break on the price.
I was told my several people that most aftermarket cats only last a couple of years so that may be the issue.
The Bronze
New member
Re: Emissions without EGR valve
The cool thing about a catalytic converter is that if the vehicle is running well, the catalyst should outlive the vehicle.
The aftermarket cats usually only fail because the reason the first catalyst failed isn't addressed. Misfires and over-fueling is a death sentence (overheating) for them. The real problem with most aftermarket cats is that the oxidation/reduction beds and the paladium, rhodium and platinum that they are coated with are not nearly as large as the original equipment devices and doesn't give you as much "cushion" for when your vehicle isn't running right.
My 2 cents here is that if your 1991-1993 vehicle can't pass the HC portion of an emission inspection, then you have a problem that needs to be addressed and it isn't the catalyst, although a functioning catalyst will lower the HCs. The standard is usually so loose, you can "almost" have a dead cylinder and pass. That changed in 1994 for light duty cars and trucks.
I am not saying a catalyst can't fail, but it isn't like spark plugs, wires, dist caps and rotors that "wear" out, it's just a chemical process.
The cool thing about a catalytic converter is that if the vehicle is running well, the catalyst should outlive the vehicle.
The aftermarket cats usually only fail because the reason the first catalyst failed isn't addressed. Misfires and over-fueling is a death sentence (overheating) for them. The real problem with most aftermarket cats is that the oxidation/reduction beds and the paladium, rhodium and platinum that they are coated with are not nearly as large as the original equipment devices and doesn't give you as much "cushion" for when your vehicle isn't running right.
My 2 cents here is that if your 1991-1993 vehicle can't pass the HC portion of an emission inspection, then you have a problem that needs to be addressed and it isn't the catalyst, although a functioning catalyst will lower the HCs. The standard is usually so loose, you can "almost" have a dead cylinder and pass. That changed in 1994 for light duty cars and trucks.
I am not saying a catalyst can't fail, but it isn't like spark plugs, wires, dist caps and rotors that "wear" out, it's just a chemical process.
Audio Man
New member
Re: Emissions without EGR valve
I agree, but in my case my truck had been run at a track previously with VP C16 through it and high boost levels. I was told that it had been ran on C16 with about 25lbs of boost and that I should probably change the O2 sensor and plugs. This was from the previous owner.
My concern was that since the converter was original to the truck that it was possible that the cat had been damaged running it that way due to increased heat. Everything else that needed to be replaced had been so that was kind of the last piece of the puzzle. Low and behold, I change the cat and it passes no problem.
I agree that a cat can and will be killed by an ill running motor. No question. The thing is when it runs well and everything is replaced and recent and it still doesn't pass, then it has to be considered.
I guess the next thing is to see what happens the next few years now that a quality converter is on it and the truck is not being ran hard like that. I like to get on it like anyone else every now and then but I have no plans on running race gas and high boost levels on a fairly stock truck. That just seems like a recipe for a disaster. Or at least a severely damaged engine.
I agree, but in my case my truck had been run at a track previously with VP C16 through it and high boost levels. I was told that it had been ran on C16 with about 25lbs of boost and that I should probably change the O2 sensor and plugs. This was from the previous owner.
My concern was that since the converter was original to the truck that it was possible that the cat had been damaged running it that way due to increased heat. Everything else that needed to be replaced had been so that was kind of the last piece of the puzzle. Low and behold, I change the cat and it passes no problem.
I agree that a cat can and will be killed by an ill running motor. No question. The thing is when it runs well and everything is replaced and recent and it still doesn't pass, then it has to be considered.
I guess the next thing is to see what happens the next few years now that a quality converter is on it and the truck is not being ran hard like that. I like to get on it like anyone else every now and then but I have no plans on running race gas and high boost levels on a fairly stock truck. That just seems like a recipe for a disaster. Or at least a severely damaged engine.