car starts but wont stay running

1999 PONTIAC BONNEVILLE
155,000 MILES
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T.FRIDAY
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when i was able to get it to stay running by forcing gas to the car there was black smoke coming from tailpipe. fuel pressure was 50lbs. psi. changed fuel filter, and relay switch, took off fuel pressure regulator and it was full of gas. so is it the fuel pump or the regulator?
Mar 18, 2012 at 4:35 PM
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SATURNTECH9
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So the fuel pressure is 50psi right now?Also if you pull the fuel pressure regulator vacuum line off while it was mounted was there fuel in the vacuum nipple area?
Nov 5, 2018 at 7:07 PM
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T.FRIDAY
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no it just smelled like gas
Nov 5, 2018 at 7:07 PM
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SATURNTECH9
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So you still have 50psi of compression?So when the engine was running you had black smoke coming out the tail pipe and it was running rough?Any codes in the computer?Hows your coolant temp sensor?What is your compression readings?Do you have a nic blue spark to all the cylinders?
Nov 5, 2018 at 7:07 PM
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T.FRIDAY
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cant keep the car running long enough to check anything. no check engine light.when it did run by pressing the gas pedal and forcing gas to it, it sounded awful, and yes black smoke,but as soon as you let off the gas it cut off.
Nov 5, 2018 at 7:07 PM
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T.FRIDAY
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only light i see is check gages
Nov 5, 2018 at 7:07 PM
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SATURNTECH9
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Check the fuel pressure again see if the fuel pressure is bleeding down when the fuel pump isnt running?Also pull the spark plugs and see if the spark plugs have excessive fuel build up on them.
Nov 5, 2018 at 7:07 PM
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AMY DEWITTE
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There is a recall on the Pontiac's Fuel pressure Regulator's. This sounds like your problem. call pontiac with your vin# and get it fixed for free.
Nov 5, 2018 at 7:07 PM
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