Emission Test Results

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  #1  
Old 08-28-08, 11:18 AM
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Emission Test Results

Hi,

I just had my car tested for the required emissions levels today. I just rebuilt the motor, and so far it runs well except for a miss at idle. I was wondering if the results from the emission testing could help diagnose the problem.

The results are as follows

High Speed (2484 rpm)

HC (ppm) 52
CO % 0.02
CO2 % 13.4

Idle (1057 rpm)

HC (ppm) 146
CO % 0.00
CO2 % 13.7

Thanks,

Jon
 
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  #2  
Old 08-28-08, 04:31 PM
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How old is the gas in the tank. Considering you just rebuilt the motor.

Casey

<a href="http://www.driverdb.com/drivers/12076/"> "http://www.driverdb.com/Sean McDonagh"</a>
 
  #3  
Old 08-28-08, 04:33 PM
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Originally Posted by casey_wa View Post
How old is the gas in the tank. Considering you just rebuilt the motor.

Casey

<a href="http://www.driverdb.com/drivers/12076/"> "http://www.driverdb.com/Sean McDonagh"</a>
It has been about a month since I completed it. This is the third tank of gas that has been in the car since the rebuild. The motor now has about 500 miles on it.

Thanks,

Jon
 
  #4  
Old 08-28-08, 04:58 PM
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What kind of car/ Motor are we discussing?

The excessively low CO at idle indicates very lean fuel....Vacuum leak, stuck injector, or misadjusted carb.....Dependent on what we are talking about.
 
  #5  
Old 08-28-08, 07:43 PM
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The motor is a 350 in a 1979 Chevy Camaro.
sorry for the lack of info

Jon
 
  #6  
Old 08-28-08, 07:48 PM
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On the rebuild I upgraded the cam from the stock to the following with hydraulic lifters
Duration @ .050 Int 204 Exh 214 Lift int .420 exh .443
Lobe seperation int 107 Exh 117
The motor was bored .030 over and I replaced the stock dished pistons with a flat piston. The stock 4 barrrel carb was used on the new motor.

Thanks
 
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