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
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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