Hydrocarbons too high

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  #1  
Old 07-06-06, 11:30 AM
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Hydrocarbons too high

I have a 1988 Dodge Dakota with a 3.9 liter and is manual. I took it to get the emmision testing and they said that it failed due to hydrocarbons are too high. Can this be because the timming is advanced too much? I know the timming is a little advanced. Any other clues will be helpful,,THX
 
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  #2  
Old 07-06-06, 11:31 AM
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If you advanced the base setting yes it will raise the HC.

and how high are we talking. a little or way to high,
was this the thread mill test to it failed, or sit and idle

Advancing the timing little will raise them just enough to fail the thread mill test.

If it is pinging under load to your HC would be a lot higher
 

Last edited by hotrodder89; 07-06-06 at 01:11 PM.
  #3  
Old 07-07-06, 05:35 AM
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Ok Thanks, It pings if I really get on it
 
  #4  
Old 07-07-06, 06:16 AM
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Ya you need to turn the timing down, if you turn it down to much will lower your HC a bit to but It will raise your CO or NO a bit I don't remeber which one, I think its CO and if you lean it you will raise your NO, if I recall right.
 
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