Initial startup rpm drop after cam.
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From: Long Island, NY
Initial startup rpm drop after cam. Hi all.
What table do i need to change to fix my initial drop in RPMs after startup? Its kind of a surge, but it evens out after just a couple seconds.
With a stock motor, the rpms hang high for a couple of seconds until it settles down to its idle speed vs ECT. Id like to get this back.
Thanks,
-Tony
What table do i need to change to fix my initial drop in RPMs after startup? Its kind of a surge, but it evens out after just a couple seconds.
With a stock motor, the rpms hang high for a couple of seconds until it settles down to its idle speed vs ECT. Id like to get this back.
Thanks,
-Tony
Reducing or deleting afterstart enrichment will cure a lot of the chugging and idle drops after startup. AE acts somewhat like a choke that slowly drop off after cranking, however for most cam setups it dumps in to much fuel.
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If your fueling is right, then you may want to look closely at your running airflow table and your iac park position settings. If you IAC park position is too high then you should see something similar to what you described. If it were a running airflow problem your startup surge would likely be accompanied by other driving issues like "cruise control" feel.
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Joined: Mar 2003
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Originally Posted by SmokingWS6
Reducing or deleting afterstart enrichment will cure a lot of the chugging and idle drops after startup. AE acts somewhat like a choke that slowly drop off after cranking, however for most cam setups it dumps in to much fuel.
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Last night I played with the effective IAC area table and the ECT after start enrichment table and got most of my problem solved.
I still need to fine-tune the RAF and IAC park position tables.
Thanks for the help guys.
John
I still need to fine-tune the RAF and IAC park position tables.
Thanks for the help guys.
John
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