HIGH HC, FAILED SMOG?
More Turbo
Joined: Jun 1999
Posts: 532
Likes: 1
From: Las Vegas
Have you performed KOEO and KOER self tests yet? When my truck failed smog, it had a code come up for the Thermactor system, but that doesn't mean yours will be the same. Do the test and post what you find.
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New User
Joined: Jun 2012
Posts: 2
Likes: 0
Don't really know what those tests are? I put new spark plugs in, air filter, and soon to be new thermostat which should help cause my coolant gauge just hovered over the normal line on the cold side (about 1/8). Don't those tests tell you why check engine light is on? How can I check if CAT is bad?
More Turbo
Joined: Jun 1999
Posts: 532
Likes: 1
From: Las Vegas
Don't really know what those tests are? I put new spark plugs in, air filter, and soon to be new thermostat which should help cause my coolant gauge just hovered over the normal line on the cold side (about 1/8). Don't those tests tell you why check engine light is on? How can I check if CAT is bad?
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 39
From: EXTREME southwest CT
If the truck isn't warming up (or doesn't think it is) the computer will always have it running rich.
Fuel Injection Technical Library » How To Run a Self-Test
Fuel Injection Technical Library » 2 Digit Self-test Codes 11-32
Fuel Injection Technical Library » 3 Digit Self-test Codes 111-171
http://oldfuelinjection.com/files/self_test.pdf
Go to a big chain auto parts store and have them pull the codes if you can't figure it out.
Fuel Injection Technical Library » How To Run a Self-Test
Fuel Injection Technical Library » 2 Digit Self-test Codes 11-32
Fuel Injection Technical Library » 3 Digit Self-test Codes 111-171
http://oldfuelinjection.com/files/self_test.pdf
Go to a big chain auto parts store and have them pull the codes if you can't figure it out.
Senior User
Joined: Nov 2010
Posts: 173
Likes: 0
Federal smog testing goes back for 25 years in some areas.
Our old F350 gasser still has to be tested in this North DALLAS Texas area.
Worn out engines will not pass smog and there is NO computer code for compression or other engine vitals.
If it is an oil hog or in general BAD, it will have to be repaired to pass.
It's old, leaking fuel injectors and other mechanical problems will take their toll over time.
Our old F350 gasser still has to be tested in this North DALLAS Texas area.
Worn out engines will not pass smog and there is NO computer code for compression or other engine vitals.
If it is an oil hog or in general BAD, it will have to be repaired to pass.
It's old, leaking fuel injectors and other mechanical problems will take their toll over time.
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Lead Driver
Joined: Jul 2007
Posts: 7,868
Likes: 9
From: Rhode Island
It's 25 years old before you're exempt down here in RI.
As mentioned, start by checking the codes.
High HC is caused by running too rich. Common problems that can cause this:
Bad Engine Coolant Temperature sensor
Slow/Bad Oxygen Sensor
Failing Catalytic Converter
High Fuel Pressure
Non-functional A.I.R/Thermactor system.
As mentioned, start by checking the codes.
High HC is caused by running too rich. Common problems that can cause this:
Bad Engine Coolant Temperature sensor
Slow/Bad Oxygen Sensor
Failing Catalytic Converter
High Fuel Pressure
Non-functional A.I.R/Thermactor system.
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Elder User
Joined: Mar 2011
Posts: 923
Likes: 1
From: North Central MA
It's 25 years old before you're exempt down here in RI.
As mentioned, start by checking the codes.
High HC is caused by running too rich. Common problems that can cause this:
Bad Engine Coolant Temperature sensor
Slow/Bad Oxygen Sensor
Failing Catalytic Converter
High Fuel Pressure
Non-functional A.I.R/Thermactor system.
As mentioned, start by checking the codes.
High HC is caused by running too rich. Common problems that can cause this:
Bad Engine Coolant Temperature sensor
Slow/Bad Oxygen Sensor
Failing Catalytic Converter
High Fuel Pressure
Non-functional A.I.R/Thermactor system.
Super Moderator
Joined: Apr 2004
Posts: 34,491
Likes: 2,806
OP is in CA, has a '92 F150.
To OP: What engine and transmission? EFI, right? Any mods?
Were you able to fix the fuel cap?
High HC is high hydrocarbons, which is almost always a too-rich mixture. If your engine is stuck in a "cold" mode, that would do it.
As to your cat, your CO number are a bit high, but you pass. I would say your CO is high because your HC is high, causing your cat to have to work a bit harder in burning those up, at least in part. In short, your cat is good, focus on the mixture.
As per prior posts, is it an oil burner, do you have the air inject system--if so, is it working right and not clogged? Codes? You gotta figure that out.
IF this is all a mystery, find a shop to do the work.
CA requires the vehicle to be OEM, and tests back to '76. Quick fixes might be in order to get the cert, but he needs to make sure this gets fixed right or he will kill the cat and not be able to pass again in 2 years without an expensive replacement.
To OP: What engine and transmission? EFI, right? Any mods?
Were you able to fix the fuel cap?
High HC is high hydrocarbons, which is almost always a too-rich mixture. If your engine is stuck in a "cold" mode, that would do it.
As to your cat, your CO number are a bit high, but you pass. I would say your CO is high because your HC is high, causing your cat to have to work a bit harder in burning those up, at least in part. In short, your cat is good, focus on the mixture.
As per prior posts, is it an oil burner, do you have the air inject system--if so, is it working right and not clogged? Codes? You gotta figure that out.
IF this is all a mystery, find a shop to do the work.
CA requires the vehicle to be OEM, and tests back to '76. Quick fixes might be in order to get the cert, but he needs to make sure this gets fixed right or he will kill the cat and not be able to pass again in 2 years without an expensive replacement.
More Turbo
Joined: Jun 1999
Posts: 532
Likes: 1
From: Las Vegas
OP is in CA, has a '92 F150.
To OP: What engine and transmission? EFI, right? Any mods?
Were you able to fix the fuel cap?
High HC is high hydrocarbons, which is almost always a too-rich mixture. If your engine is stuck in a "cold" mode, that would do it.
As to your cat, your CO number are a bit high, but you pass. I would say your CO is high because your HC is high, causing your cat to have to work a bit harder in burning those up, at least in part. In short, your cat is good, focus on the mixture.
As per prior posts, is it an oil burner, do you have the air inject system--if so, is it working right and not clogged? Codes? You gotta figure that out.
IF this is all a mystery, find a shop to do the work.
CA requires the vehicle to be OEM, and tests back to '76. Quick fixes might be in order to get the cert, but he needs to make sure this gets fixed right or he will kill the cat and not be able to pass again in 2 years without an expensive replacement.
To OP: What engine and transmission? EFI, right? Any mods?
Were you able to fix the fuel cap?
High HC is high hydrocarbons, which is almost always a too-rich mixture. If your engine is stuck in a "cold" mode, that would do it.
As to your cat, your CO number are a bit high, but you pass. I would say your CO is high because your HC is high, causing your cat to have to work a bit harder in burning those up, at least in part. In short, your cat is good, focus on the mixture.
As per prior posts, is it an oil burner, do you have the air inject system--if so, is it working right and not clogged? Codes? You gotta figure that out.
IF this is all a mystery, find a shop to do the work.
CA requires the vehicle to be OEM, and tests back to '76. Quick fixes might be in order to get the cert, but he needs to make sure this gets fixed right or he will kill the cat and not be able to pass again in 2 years without an expensive replacement.
OP, as a quick check, inspect all your vacuum hoses/tubings, especially to the smog components. I believe that your smog components have vacuum ports like my 91 does. I replaced all my vac tubing with rubber hoses.
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