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Fuel Pressure regulartor shim

712 views 1 reply 2 participants last post by  xtremexj 
#1 ·
I was wondering if a guy could do a fuel regualtor shim without a tuner or would I just be wasting my time also I wondering if someone could point me towards a place for instructions on how to do it
 
#2 ·
I wouldn't bother without the tuner. Even with the tuner, unless you have a really big file it wouldn't do much good. The only time my fuel pressure drops below where I'd like it to be is on my big race files.
 
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