DeVille Fan Posted August 2, 2019 Report Share Posted August 2, 2019 Just joined. First post. I have a '93 DeVille with a 4.9. First question would be, if I have a Fuel Pump that is going bad, would it show up on the Codes? Thanks Quote Link to comment Share on other sites More sharing options...
Bruce Nunnally Posted August 2, 2019 Report Share Posted August 2, 2019 I think you would need to check the fuel pressure at the rail. A fuel pressure regulator can show similar symptoms to a bad fuel pump btw. Quote Bruce 2023 Cadillac CT4-V Blackwing Follow me on: Twitter Instagram Youtube Link to comment Share on other sites More sharing options...
DeVille Fan Posted August 2, 2019 Author Report Share Posted August 2, 2019 OK, thanks. We will give that a try. Quote Link to comment Share on other sites More sharing options...
rockfangd Posted August 4, 2019 Report Share Posted August 4, 2019 The short answer is I doubt it. Other than driveability and other codes related to fuel trim the best way to tell is to check fuel pressure. Even more obvious may be the sound of the pump itself. Quote GM FAN FOREVER Nice, clean, luxury= fine automobile Link to comment Share on other sites More sharing options...
DeVille Fan Posted August 5, 2019 Author Report Share Posted August 5, 2019 OK, thanks. The Pump sounds OK and everything seems normal with it. My problem is that the car cut out on me again after a full tune-up last fall. I want to start with ruling out the Fuel Pump as a possibility. I have a Gauge on order. Thanks again. BodybyFisher 1 Quote Link to comment Share on other sites More sharing options...
sonjaab Posted August 5, 2019 Report Share Posted August 5, 2019 You can usually borrow one from your big box auto parts school. You gonna have to buy/rent a fuel line clip wrench too IIRC. DeVille Fan 1 Quote 93 DeVille-13 Chevy Impala 72 GTO - 77 Triumph Bonneville 84 Z-28 Syracuse NY Link to comment Share on other sites More sharing options...
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