Won't pass smog. Help?
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Won't pass smog. Help?
I have a inbalance from the right head to the left head. Their is a 20 pound difference. Could that cause it to fail emissions? I rebuilt the carb, new egr valve, new plugs, changed ignition, new fuel pump, and other parts. It still serges and puts out lean fuel. I had a new carberator on here and it still segered . So it can't be the carb. Slight jump from 19 to 20 pnds on vaccum
It only failed at idle. which states it is running lean.
Carb won't take adjustment
email me please. fredandjoannesadventures@yahoo.com
No oil is leaking. No oil blowing out. No smoke. runs great. Just vapor that is bad. No matter what I do it burns the same.
It only failed at idle. which states it is running lean.
Carb won't take adjustment
email me please. fredandjoannesadventures@yahoo.com
No oil is leaking. No oil blowing out. No smoke. runs great. Just vapor that is bad. No matter what I do it burns the same.
Last edited by fredadams; Oct 29, 2010 at 07:49 AM. Reason: wife posted
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Your post is confusing... What are you talking about when you describe a 20 lb.
inblance? Cylinder compression on all cylinders from one head to another? Weight of the
head castings? Or, what?
About the carb, how can it not "take an adjustment?" What have you tried adjusting, and
what were the results? What does it mean when you say it "puts out lean fuel?"
What are your CO & HC numbers at idle and at running RPM?
Most importantly, what year is your truck and what engine?
Nobody is going to e-mail you, that's not how most Internet forums work.
inblance? Cylinder compression on all cylinders from one head to another? Weight of the
head castings? Or, what?
About the carb, how can it not "take an adjustment?" What have you tried adjusting, and
what were the results? What does it mean when you say it "puts out lean fuel?"
What are your CO & HC numbers at idle and at running RPM?
Most importantly, what year is your truck and what engine?
Nobody is going to e-mail you, that's not how most Internet forums work.
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You post is confusing. However, what part of the emissions test did you fail?
If you make the mixture lean, it reduces hydrocarbon emissions but this increases combustion temperature which increases NOX emissions.
If you make the mixture rich, it increases hydrocarbon emissions but this decreases the combustion temperature which decreases the NOX emissions.
This is why engines with emissions equipment have EGR. You can run the mixture a little lean to reduce hydrocarbon emissions and at the same time introduce a small amount of exhaust gas back into the combustion chamber which slows combustion resulting in lower combustion temperatures and lower NOX emissions. EGR is a win-win for emissions.
So, there are a lot of possibilities for why you emissions failed. Let us know which part(s) of the test failed.
If you make the mixture lean, it reduces hydrocarbon emissions but this increases combustion temperature which increases NOX emissions.
If you make the mixture rich, it increases hydrocarbon emissions but this decreases the combustion temperature which decreases the NOX emissions.
This is why engines with emissions equipment have EGR. You can run the mixture a little lean to reduce hydrocarbon emissions and at the same time introduce a small amount of exhaust gas back into the combustion chamber which slows combustion resulting in lower combustion temperatures and lower NOX emissions. EGR is a win-win for emissions.
So, there are a lot of possibilities for why you emissions failed. Let us know which part(s) of the test failed.
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Need Advice
I have a, 1983 Ford E-350 carberated by holley. Can not pass smog. The fumes are strong. Gross polluter. I brought it to the smog shop and was told to get a carb. I did that even though the one I had on here was rebuilt. Brand new egr, air by pass valve, brand new injection pump, pulled the heads and had them redone, new gaskets under manifold, new valley pan, and had the hoses check to make sure they were right. Sprayed carb cleaner around the manifold looking for leaks and none were found. Put a vacum gauge on line. Have 18 pds of vaccum steady. New timing chain. Exchanged distributors and spark mondule box.
When the engine gets warm is when it picks up a miss from improperly mixed fuel. It can't be the carb because it is doing the same thing after I bought a new carb last week.
Fred
When the engine gets warm is when it picks up a miss from improperly mixed fuel. It can't be the carb because it is doing the same thing after I bought a new carb last week.
Fred
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Yes, all our factory devices are hooked up.
thank you for helping me.
Fred
Last edited by ctubutis; Oct 30, 2010 at 09:26 PM. Reason: Fix the quote.
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1983 e-350 w/460 engine/ 4 barrel carb. New holley carb on here with a new egr valve. I did read that they did have recalls on this year. If so, it stated under solutions, to modify the base of the carb. How do I do that?
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Hi,
I have a 1983 Ford 350/460 engine with a NEW four barrel 4180c holley carb. New egr valve, hoses are all on right, new distributer, had the heads rebuilt, new timing chain, many more parts. I have between 17 and 18 pounds of vacum with slight movement with the needle.
I have a 1983 Ford 350/460 engine with a NEW four barrel 4180c holley carb. New egr valve, hoses are all on right, new distributer, had the heads rebuilt, new timing chain, many more parts. I have between 17 and 18 pounds of vacum with slight movement with the needle.
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I doubt ford is recalling 1983 vans...
If the emissions tester did not give you readings printed on paper they are scr3wing you over. Did they sell you the parts too?
350/460??? no such combination, how do you know you have everything hooked up right if you don't know what f'ng motor you have?
If you want to modify the base of the carb without knowing what to modify, we can only make a wild guess. In that case I suggest you throw it down the street like you are skipping a rock because seriously, without additional pertinent information from you anything we can tell you is useless without the information we are asking you for and you are just wasing your money.
If the emissions tester did not give you readings printed on paper they are scr3wing you over. Did they sell you the parts too?
350/460??? no such combination, how do you know you have everything hooked up right if you don't know what f'ng motor you have?
If you want to modify the base of the carb without knowing what to modify, we can only make a wild guess. In that case I suggest you throw it down the street like you are skipping a rock because seriously, without additional pertinent information from you anything we can tell you is useless without the information we are asking you for and you are just wasing your money.
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"350/460??? no such combination"
He left out the "E". He has a 1983 E350 with a 460.
Fred - it is really hard for anyone to help you fix your emissions problem without knowing the numbers. Running too lean can cause it to fail, but so can running rich. Without the numbers, nobody is going to know what to do to fix it. Can you get the numbers from the emissions place?
You said that the exhaust fumes are really strong. This is often an indication that it is running really rich.
If you are having your emissions tested at a shop and they won't give you the numbers, it is time to go to a new shop.
Also, check your state emission laws. In Maryland, for example, if you fail the emissions test, if you spend $500 on emissions related repairs and show them the receipts, you get a 2 year waver. This doesn't help fix the problem, of course, but it gets the state off of your back and keeps your tags legal.
He left out the "E". He has a 1983 E350 with a 460.
Fred - it is really hard for anyone to help you fix your emissions problem without knowing the numbers. Running too lean can cause it to fail, but so can running rich. Without the numbers, nobody is going to know what to do to fix it. Can you get the numbers from the emissions place?
You said that the exhaust fumes are really strong. This is often an indication that it is running really rich.
If you are having your emissions tested at a shop and they won't give you the numbers, it is time to go to a new shop.
Also, check your state emission laws. In Maryland, for example, if you fail the emissions test, if you spend $500 on emissions related repairs and show them the receipts, you get a 2 year waver. This doesn't help fix the problem, of course, but it gets the state off of your back and keeps your tags legal.
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What are you talking about? I have a ford 1983 Ford E-350 with a 460 engine. I assumed you would had known what I meant. My husband has done many of engines before. It is not an engine problem. As far as the smog shop goes, yes, you are right. The sold us the parts and then tried to tell us to come back monday and for another 200.00 they can put a air by pass valve on here. This is a jamboree motor home. All knew parts. Nothing wrong with the new carb or the new egr valve.