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Grand Am/IMSA Data Guy
Join Date: Apr 2004
Location: Southwest Florida
Posts: 1,854
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I use the 84 and later fuel pump. You need at least 50 psi, not sure of the output of the CIS pump. I'd add a fuel pressure gauge to check before you spend a lot for a later fuel pump. Describe "not running great", might be something simple.
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Jerry Austin
AIM Data Products Dealer
84 911 3.6 track car - Sold
Morris Minor Van with S2000 running gear
http://austinmotorsportsllc.com/
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