 high exhaust emissions, when idling |
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| DavidSweden |
 Jul 10 2019, 02:32 PM
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Member  Group: Members Posts: 479 Joined: 8-June 14 From: Sweden Member No.: 17,452 Region Association: Scandinavia  |
76- 2.0- D jet with Pertronix ignition
Car has high emissions at idle but good at higher rpm. Engine warm Does this indicate that the engine is miss firing one one cylinder when idling and how do I check that its firing on all cylinders? The engine sounds fine, any ideas as to what is causing the high exhaust emissions? |
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| jcd914 |
Jul 10 2019, 05:31 PM
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Advanced Member Group: Members Posts: 2,081 Joined: 7-February 08 From: Sacramento, CA Member No.: 8,684 Region Association: Northern California |
What emissions are high? CO% HC ppm? Other?
A vacuum leak could create a lean miss at idle that goes away at higher RPM. Overly rich idle mixture could lean out at higher RPM. Jim |
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| DavidSweden |
Jul 11 2019, 10:02 AM
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Member Group: Members Posts: 479 Joined: 8-June 14 From: Sweden Member No.: 17,452 Region Association: Scandinavia |
QUOTE(jcd914 @ Jul 10 2019, 03:31 PM)  What emissions are high? CO% HC ppm? Other? A vacuum leak could create a lean miss at idle that goes away at higher RPM. Overly rich idle mixture could lean out at higher RPM. Jim High HC ppm, the idle is about 700 It sound like its firing on all cylinders, I will check the hoses any other ideas? |
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Posts in this topic
DavidSweden high exhaust emissions Jul 10 2019, 02:32 PM
Bleyseng Overly rich? Could be the CHT is going...... Jul 10 2019, 08:38 PM
Dave_Darling Turn the idle RPM up to at least 900. We usually ... Jul 11 2019, 05:00 PM |
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