2010 Buick Lucerne fuel system issue.

Joined
Jun 10, 2021
Messages
2
Points
1
Make
Buick
Model
Lucerne
Year
2010
Miles
1450000
Engine
V6
2010 Buick Lucerne fuel system issues, fuse, relay burnt, changed both and replaced fuel pump. Tested circuit car turns over cranks, but won’t start.
bleed injector off engine, will not start. Out of ideas. Any ideas or help?

thanks!
KM
 

billr

wrench
Staff member
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Mar 12, 2007
Messages
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Points
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Whoa, slow down and let us catch up. What makes you think it is a fueling problem? Any codes set? Will it fire and run briefly with a quick blast of starting-fluid? Have you checked fuel pressure with a gauge? Have you checked for injection pulses with a voltmeter or 'noid light? Are you using live-data to check engine sensors?
 

billr

wrench
Staff member
Joined
Mar 12, 2007
Messages
7,172
Points
63
Whoa, slow down and let us catch up. What makes you think it is a fueling problem? Any codes set? Will it fire and run briefly with a quick blast of starting-fluid? Have you checked fuel pressure with a gauge? Have you checked for injection pulses with a voltmeter or 'noid light? Are you using live-data to check engine sensors?
 
Joined
Jun 10, 2021
Messages
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Points
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Common problem with this type and model of car noticed the fuel relay in the fuse box underneath the passenger seat in the back was deformed burnt and broken the fuse was blown and the car would not restart after it was just running it cranks over does not start for a brief second it sounds like it’s about to start but then it just continues to crank research those a lot online and found out it’s a common problem that the rear seat hit the fuse box putting a strain on the fuel relay causing it to either short-circuit or break or melt.
Yes we text for fuel pressure with a gauge have checked with a multimeter and a trouble light
 

Mobile Dan

wrench
Joined
Mar 1, 2002
Messages
3,804
Points
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Location
Kentucky
What were the results of fuel pressure test? How much pressure do you have?

Any damage to the fuse/relay block? A "burnt relay" may cause damage to connection points where relay plugs into block.
 
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