 high exhaust emissions, when idling |
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| DavidSweden |
 Jul 10 2019, 02:32 PM
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Member  Group: Members Posts: 481 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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| Dave_Darling |
Jul 11 2019, 05:00 PM
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914 Idiot Group: Members Posts: 15,303 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California 
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Turn the idle RPM up to at least 900. We usually run it "just under 1000". I think the factory spec is somewhere between 800 and 950 RPM, depending on the exact year/engine.
Try adjusting the knob on the ECU. Count the number of "clicks" on the knob, or mark it so you can get it back to where it was if you need to. Going counter-clockwise should make the mixture leaner at idle only. If that helps your CO, then you were running rich. If that doesn't help, try going the other way. --DD |
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Posts in this topic
DavidSweden high exhaust emissions Jul 10 2019, 02:32 PM
jcd914 What emissions are high? CO% HC ppm? Other?
A vac... Jul 10 2019, 05:31 PM
DavidSweden
What emissions are high? CO% HC ppm? Other?
A va... Jul 11 2019, 10:02 AM Bleyseng Overly rich? Could be the CHT is going...... Jul 10 2019, 08:38 PM |
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