93' century wont start... - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 02-18-2013, 10:03 AM   #1
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Exclamation 93' century wont start...

hello guys i was working on my car this past week... i had replaced my fuel sending unit the old one had lines that were rusted through in so many places it wasnt even funny...

but before i replaced it my buick would start up fine. now it seems she isnt getting gas... i checked the lines and the pump is pumping fuel...

when i go to start, the engine turns over might start and sound normal but then just stalls almost like there is no gas in my tank...

i could use any help i can get i have no idea how to go about this atm...

thanks guys
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Old 02-18-2013, 10:08 AM   #2
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replace filter? check ground and other electrical connections at the tank? sometimes disturbing the wires will make them intermittent.
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Old 02-18-2013, 10:24 AM   #3
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well the pump is pumping... i for got to mention i did replace the filter while i had the tank down... fuel is being pumped... the engine wont start though i wonder if maby the engine is flooded =/
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Old 02-18-2013, 02:14 PM   #4
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you could have gotten a wrong or bad pump, ive never worked on one of those but there is normally a place on the rail to check the pressure. if its not in spec the engine wont start
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Old 02-18-2013, 03:53 PM   #5
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i checked the fuel pressure and it was fine... i have moved on to suspect the vacum lines...
the rubber lines were rotted away... replaced them and got a big improvement... still stalling though... replaceing the fuel pressure regulator which required the removal of the injectors and fuel rails...
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Old 02-18-2013, 04:52 PM   #6
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update... the car will start. but if the rpms drop the engine wants to stall... my dad is adamant that its a vacuum leak some where but im not so sure on that...
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Old 02-18-2013, 08:12 PM   #7
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vacuum can case all sorts of problems, check with carb cleaner and listen for the engine to change pitch. are there any check engine lights? codes?
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Old 02-19-2013, 02:45 PM   #8
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we changed all the vacuum lines that were dryrotted rubber... and checked for codes... none showed up
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Old 02-19-2013, 03:52 PM   #9
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lots of places to leak vacuum besides hoses. sensors, gaskets, fuel pressure regulator, anything after the maf
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