Very rough idle cold start after sitting - Pontiac G8 Forum: G8 Forums - G8Board.com
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post #1 of 3 (permalink) Old 07-19-2019, 08:48 PM Thread Starter
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Very rough idle cold start after sitting

https://youtu.be/1kQ4q_94SAc

Very rough idle cold start. Only after sitting 4 hours or so (half as bad as vid) video is from sitting overnight. The rough idle lasts for 3 to 5 seconds then runs good. Before it only did this in freezing temps. Rarely it will stall out. Sometimes pops from exhaust when its idling rough.
6.0/kooks/rotofab/livernois tune
Does it on stock tune too.
Cleaned maf
Cleaned tb
Performed injector test with AFIT all within 3%
Performed fuel pressure leakdown test with AFIT, no fuel bleeddown after 15 minutes.
Fuel pressure 58psi
Performed crankshaft variation learn
Performed idle learn reset
Just changed spark plugs
All temp sensors read what they should.
TECH2 shows no misfires
Any ideas?
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post #2 of 3 (permalink) Old 07-20-2019, 06:13 PM
every village has one
 
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Location: michigan
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Mileage?
Where are you located?

things are not as they appear to be.........

2009.5 LiquidRed/OnyxRed, Premium Package
e85 Surprise Package
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post #3 of 3 (permalink) Old 07-20-2019, 07:17 PM Thread Starter
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130,000km about 80k miles. Sask, canada
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