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Discussion Starter · #1 ·
I have noticed my car hates starting on hot days living in Texas this is a problem. Looked around and the fuel pressure regulator seems to need replacement. I filled up with 93 octane the other day (10 gallons) and the car says it is getting 20-22 mpg so I assumed I would get 200~ miles I got 160.

Would the regulator cause a drop in mpg that badly? Are there any other issue I need to be looking into? The check engine light will randomly come on (engine timing slow) but then goes off so it does not seem to be a persistent problem.
 
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