FUEL SENDING UNIT

1993 BUICK ROADMASTER
225,000 MILES • 5.7L • V8 • 2WD • AUTOMATIC
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BIGGS
  • MEMBER
  • 16 POSTS
if i suspect a bad sending unit can i just unplug it as it has a separate plug to the fuel pump, will my run and by unplugging the sender and it fixes the stalling problem then i would know its the sender and not the pump that is giving me the stalling out problems, will this work for testing?
Mar 27, 2017 at 4:05 PM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
no it also connects the pump. check fuel pressure with a gauge auto parts rent it. if you are getting hesitation a gauge will not cause the problem. pressure should be 41-47 psi minimum see link
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
Mar 27, 2017 at 11:23 PM
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