Quote:
Originally Posted by setasai
Same. Matt thinks it has to do with a timing issue for me because mine is coming from the top. He's got a few ideas for me to test out this weekend. I'll keep you all posted.
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It is interesting that you are having this issue with the "injectors on top" install. I was assuming some puddling of fuel was occuring since the MAP sensor inlet is towards the bottom of the TB in the "injector on bottom installs.
But you having the problem means the injector pulse is continuing past the point where the cylinder is creating a vacuum in the TB therefore allowing the vacuum in the MAP sensor line to injest fuel when it equalizes to atmospheric.
Advancing the injector pulse timing should fix this. Basically you want a little airflow before and after the injector pulse so no residual fuel remains in the throttle body.