Help Me Pass Emissions.

[TheSaint]

So what's the plan?

You sure it's going into closed loop? I don't see a simple trouble code for that. If the diverter valve isn't working properly it could be pumping air into the exhaust manifolds when it should be pumping into the catalytic converter and helping to oxidize those hydrocarbons. No?

So what's the plan?

You sure it's going into closed loop? I don't see a simple trouble code for that. If the diverter valve isn't working properly it could be pumping air into the exhaust manifolds when it should be pumping into the catalytic converter and helping to oxidize those hydrocarbons. No?

In the process of going through the AIR System I snapped the check valve right off the air injection pipe. I ordered a new one and the second nut got stripped very easily so I had to fabricate and weld on some more tube and use a nut off the old one! Should try to install today. And check to make sure that system is working properly.

 

[TheSaint]

I'm wondering if theres something to the above suggestion... who rebuilt the carb previously? Was it a shop? Service? Ordered as a replacement?

And what manual did they use as for settings?

If it was sent out, it may have been done for lower altitude. It may not even be your original.

Many carb places, even mailout ones that tell you to send yours in, take yours as a core but just grab the body of another carb of similar style out of a bin and build it for you. Only later disassembling yours and running its parts through cleaner and plating for future use. In fact, sometimes you get the body from one carb, base from another, airhorn from a third. So it's important to vet who does the work.

I had a friend go through it and use a rebuild kit to replace a few things and put a new throttle position sensor in, we put it back on the car and it ran fine, to make sure it was running properly I sent it to Texas to be looked at, he called me and told me he had tested it out and it was running great, that for the altitude in Denver it would be right where it needs to be he said he could rebuild it and clean it up some but in his opinion I’d be wasting money. He sent it back and I installed it. Haven’t messed with it much since.

 

[fleming442]

mstravens , AutoZone isn't going to read codes on an OBD1. The paperclip doesn't have enough technology for the kid to press the button. Additionally, e85 isn't going to do squat on 7.9:1 compression. It'll probably evaporate before it even gets to the combustion chamber.

 

[JimmyCamino]

Yeah, those check valve connections can be real uncooperative. On mine the nut was frozen on the pipe like yours was. I was able to remove mine by holding the air injection pipe nut in place while turning the check valve out. The tension on the hose will want to rotate it back, but I was able to crank the hose on the valve to put pre-tension on it then loosen the valve out of the pipe nut. Little at a time. Lotta good my advice does you now that it's broken right? Well just in case you need to remove the other one.

Does your catalytic converter have one of these hoses (green)? Likely yes since you have replaced it. When I replaced the cat on my '84 Camino 305H (which is probably the same type system as your 229K) this is what I got. If so, you could pull the hose of the cat to find if at operating temperature it's blowing air. If it is, the AIR system is probably working properly.

 

[TheSaint]

Yeah, those check valve connections can be real uncooperative. On mine the nut was frozen on the pipe like yours was. I was able to remove mine by holding the air injection pipe nut in place while turning the check valve out. The tension on the hose will want to rotate it back, but I was able to crank the hose on the valve to put pre-tension on it then loosen the valve out of the pipe nut. Little at a time. Lotta good my advice does you now that it's broken right? Well just in case you need to remove the other one.

Does your catalytic converter have one of these hoses (green)? Likely yes since you have replaced it. When I replaced the cat on my '84 Camino 305H (which is probably the same type system as your 229K) this is what I got. If so, you could pull the hose of the cat to find if at operating temperature it's blowing air. If it is, the AIR system is probably working properly.

Yeah I barley put any pressure on it, and it just snapped. And my luck I ordered a new injection pipe and one of the tube nuts stripped! SMH! Yes I have the same set up on the cat and that’s what I was doing just going down the line towards the cat to see if anything was clogged or not. I’m at a stand still again. I pulled a few plugs and I’m noticing some dry fouling.

 

[JimmyCamino]

I consulted with another expert. He reiterated the advice given in post #26. "Crazy rich... if the new converter isn't already trashed, it soon will be!"

 

[TheSaint]

I consulted with another expert. He reiterated the advice given in post #26. "Crazy rich... if the new converter isn't already trashed, it soon will be!"

If that’s the case we’ll just buy another, no worries!