Quote:
Originally Posted by theiceman
I think the general idea is the plenum delivers the fuel from the CSV right to the cylinders so it doesn't pool in the airbox and ignite causing a back fire. But I never had any before either so who knows.
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The new airboxes with ‘spider’ plumbing have helped reduce the occurrence of backfire due to unwanted fuel accumulation inside the box but not totally eliminated it. As long as you have a CIS engine in your car, you will experience a backfire now or later. It is a matter of when it will happen. Specially if you are doing a start up after an engine rebuild or a newly assembled CIS unit.
The CIS airboxes in my inventory. All of these are cracked and some have the spider plumbing in it and other with and without POV. And I had disposed a lot of these because they were unusable and could not be fixed. I prefer airboxes with POV.
Tony