You can pull that TFI module off the front of the distributor and have it tested at a local parts store, I know advance auto parts has a tester, and I think its a 5.5mm bolt in there and its kind of a b**ch to get to you have to use a special tool. I would say that if your fuel press. reg was blown you would get horrible mileage. My stock one blew and that his how I noticed that.
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