Quote:
Originally Posted by undertow
Can you include MAF airflow (grams/sec) in your log? Should be about 6.5-7 g/s at idle once warmed. If MAF airflow is low at idle and fuel trims high, you might have a big old vacuum leak (unmetered air). Check the PCV valve and the rubber elbow on the fuel pressure regulator, I had a hard-to-find leak at the latter. |
Here's the video showing the
MAF airflow (middle column).
You make a really good point, as the revs increase during idle hunt the airflow number isn't changing, so the air must be coming from somewhere else? You can see airflow increase when I take it up to 2300rpm, but the idle hunt number doesn't move...