A 200 pollutin like crasy.

[Anonymous]

Hi there.

My name is Hjörleifur, I'm from Iceland and I do belive you guys have answered some of my questions before in the forum. If I could bother you with a question (or twenty..) , I've been going through the forums looking for a how to on my problem but havent found the answer.. I have a 200 inline from a '80 Fairmont in my Bronco, a brilliant engine that I love and wouldn't switch even though I have a 302 sitting in the garage.

The inside of the engine is restored (stock) and I have some fine dual headers (clifford) on the thing which does the trick, and a 2 bbl Holley carb. I have new valves, new piston rings, etc. etc. and I personally rebuilt the carb with an original Holley rebuild kit.

Thing is, We have a pretty strict pollution law here in Iceland and the Bronco measures off the charts despite how I tune it, it simply doesnt response to the tuning, but runs like a swiss watch! I have seen some talk (in the forums) of the gas running through the 2bbl carbs being restricted with wire in the power valve but it seems to me like tuning down the carb?

What to do?

Thanks, Hjörleifur.

 

[Anonymous]

Sorry, forgot to mencion, I've got the Dura II already.

H

 

[ludwig]

Værðu sæll, vínastr.
Hvaþs með ásinum?

Can't help you with the carb issue but I just had to say that.

 

[Anonymous]

Hvað er með Ã￾sum!

So spoke Þrymur, the lord of þursar when Loki asked him where Þór's hammer had gone.

PM me if you want to talk about our mythology, I am deep in.


I still need to know how to get my Holley to behave on top of the 200 Fairmont..

Hjörleifur

 

[ochretoe]

I'm not recomending this but I know people who have put a small 1V and an inline cadiletic (sp) converter on just for emission test then removed for daily driving. Not a good answer but one non the less

 

[Anonymous]

Of course I could go that way to pass inspection (once a year and a very close one) but I am looking for this setup running 100% all the time and I belive it is very possible. Thanks a lot nontheless.

Hjörleifur.

 

[XFlow_Fairlane]

what part of emissions is it failing? unburnt hydrocarbons? NOx?

 

[matt1967]

alchahol in the gas, helps emissions. like try 10% methanol alchahol. we run this mix in some states of the US, right out of the pumps.

 

[69Falcon]

alchahol in the gas, helps emissions. like try 10% methanol alchahol. we run this mix in some states of the US, right out of the pumps.

Actually, we run 10% ethanol, not methanol.

 

[ludwig]

matt1967 wrote:
alchahol in the gas, helps emissions. like try 10% methanol alchahol. we run this mix in some states of the US, right out of the pumps.


Actually, we run 10% ethanol, not methanol.

Maybe he meant to pour the Akavit in the tank and not into the driver.

 

[matt1967]

alchahol in the gas, helps emissions. like try 10% methanol alchahol. we run this mix in some states of the US, right out of the pumps.

Actually, we run 10% ethanol, not methanol.

yeah, ur right, we do.

 

[mustang6]

You reminded me of a funny experience I had years ago getting a 1977 F150 with an FE to pass emissions (they aren't so picky about visual stuff in my state, but you still have to pass the sniffer). I got this truck without an engine, and the reason I bought it was because I had a friend who had a newly rebuilt 1962 352 that was bored .080 over and ran too hot for the radiator in his car to cool. I got the engine for $200, the truck for $500, put them together and had a sweet runner, that big old truck radiator kept the engine cool enough.

Since the truck was a 77 it was subject to emissions. The engine had a new Holley 500 CFM, stock exhaust manifolds, and new dual exhaust. It failed miserably on HC the first try, running way too rich and ignition too far advanced. So I picked up a stock 77 2-bbl Ford carb and put that on and backed off the advance for a 2nd try- this time it ran lean enough to pass on the HC but the CO was now about double the acceptable levels. I talked to the emissions guys about what could be done but they were convinced there was no way a 1962 engine could pass 1977 emissions no matter how fresh it was.

Then I got an idea. The way they make sure the test is valid is by measuring CO + CO2 as a % of exhaust. It has to be at least 6%, and my reading was 20%. Since I needed the CO to go down without raising the HC, I asked the guys what would cause CO + CO2 to be too low to qualify the test. They said a leaky exhaust system sometimes disqualifies people because not enough exhaust gets to the end of the pipe to be sniffed. I asked them if there were any rules about leaky exhaust, they said not really, as long as the CO + CO2 was above 6%.

So I pulled out into their parking lot and loosened my exhaust pipes at the exhaust manifold flanges- made about a 1/4 inch gap on both sides- exhaust still came out the pipes but with not nearly as much pressure. Then I went back around and got back into line for my 3rd try. Everyone else in the other lines were looking at me- my engine was running crappy from being so lean and retarded, and my exhaust sounded almost like it was open, it was so loud.

The guys in the emissions station were shaking their heads as I pulled in and they hooked everything up. But when the test was run, my CO was now under the acceptable limit and my CO + CO2 had only dropped to 9%- still high enough to be valid! I passed the test!

After I received the passing paperwork I pulled back out in their parking lot and tightened my exhaust back up, advanced the timing, and drove away.

 

[Anonymous]

Hi.

It's the CO that is off the chart. Is there too much fuel running through unburned? I really want to know if this is a standard problem when a 2bbl Holley (280 cfm) is used on a 200 and the carb needs to be tampered with in any way or if I screwed up in restoring the carb.

Hjörleifur

 

[rmoe88]

i dont know how accurate this is but i found this on the web. Hope it helps

 

[simon]

Hi.

It's the CO that is off the chart. Is there too much fuel running through unburned?

high CO is an indicator of rich fuel mixture.

How are emissions tests performed in Iceland? just a sniffer test at idle, or different simulated load situations?

If one refers to a carb'd engines tendencies to run best on comperatively richer air/fuel ratios than fuelies as problematic, or not, is a matter of federal regulations.

Classic car enthusiasts in Germany are faced with sniffer tests for all vehicles '69 and up. The common procedure to pass those tests is to choke down the engine on its real-world needs. Pass the test, then reset carb and timing to some more realistic (richer and more advanced) settings. Don't know if that'd work for you, I'm just tossing this one in.

this might be of interest for you as well.

I also like mustang6's approach; an air pump hooked to the collector might work as well to reduce emissions in percentage.

 

[Anonymous]

Hi Hjörleifur!
Newbie Olli here.This is a well known problem in Germany.
If you have a Holley i would,first of all,check the powervalve!Pretty simple:
If you turn the idle mxture screws all the way in and the motor runs on 99% a blown powervalve is what you got.The little diaphragma will let raw gas dribble from the carb base in the manifold.Not detectable from outside!
Replace it and make shure to use the right gasket,since there are a few differnet ones!
Another problem:If you have a low vacuum engine,like from a radical camshaft,the idle transition cuicit is exposed.Thats because you have to open the butterfy way to much,to keep the motor from stalling.Idle fuel comes not only from the little idle holes but also from the idle transition slots above then.No good!The oldschool method is to drill a 3mm hole in every butterfly.Idle air will go through that holes and that allows you to close the butterflys to a normal level where no idle transition slots are exposed..

...hope that helps..
OldSchoolOlli