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Frickle
Dodge Dakota
JOIN HERE
10/08/2010
00:47:53
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 Subject: High HC failed smog 4.7 V8 HELP!!
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Message:
2000 CC 4.7 with airaid intake, TB spacer, Jet Stage 2 chip, JBA Headers. 130K miles
Truck failed smog barely over on HC first test. all other emissions read almost 0. Just changed oil week before. 2nd test changed spark plugs and let truck run at 3000 rpm up until 2 mim before test. then HC were through the roof 3x more than first test. HELP!!!
If I dont get it to pass in less than a month my truck will be impounded :(
FYI truck passed smog 2 years ago with same aftermarket parts...
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yea
Dodge Dakota
JOIN HERE
10/10/2010
09:37:07
| RE: High HC failed smog 4.7 V8 HELP!!
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Message:
Copy and paste this link into your browser. It's a
list of things that will cause it.
http://www.smogtips.com/failed-high-hydrocarbons-
HC.cfm
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yea
Dodge Dakota
JOIN HERE
10/10/2010
09:45:57
| RE: High HC failed smog 4.7 V8 HELP!!
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Message:
Here's some more........
Hycrocarbons (HC)*
A list of common causes of HC related smog check
failure:
1. Ignition Timing Advanced above
specifications.Timing is measured in degrees.
before or after Top dead center. If your vehicle
is required to be at 10b degrees and instead is
set at 16b degrees your HC emissions will
increase. ( b = before top dead center ) .
2. Ignition system problems. Parts like the
ignition coil, distributor cap, distributor rotor,
ignition wires, spark plugs.
3. Vacuum leaks, Gasket leaks that cause vacuum
leaks. Broken, disconnected or misrouted vacuum
hoses.Vacuum component failure such as a power
brake booster.This causes a very large vacuum
leak.
4. Catalytic converter failure. (Avoid using a
catalytic converter as a bandage. Fix the source
problem and then move to the converter.)
5. Air injection system problems. ( Smog pump and
related components )
6. Engine damage (burned valve, low or no
compression in one or more cylinders).
7. Sensor problems and or computer problems can
cause a Smog Check failure.
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?
Dodge Dakota
JOIN HERE
10/15/2010
13:55:00
| RE: High HC failed smog 4.7 V8 HELP!!
IP: Logged
Message:
Probable vacuum leak or related .
May want to get rid of that 'spacer' - it probably does not help anything anyway..
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Josh
Dodge Dakota
JOIN HERE
10/15/2010
21:16:23
| RE: High HC failed smog 4.7 V8 HELP!!
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Message:
Throttle body spacer is useless on a 4.7L
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