Question about 1999 Chevrolet Tahoe

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I need to know what the min. fuel pressure is for a 1999 Tahoe with a 5.7?

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Pressure should be 60-66 psi.

Posted on Jun 26, 2009

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Its a 1999 chevy tahoe. Changed fuel pump twice.


Could be the pressure regulator on the fuel rail. Pull the vacuum line off the regulator and check it for fuel contamination. There should not be gas in the line. If there is fuel in that line the regulator is bad and needs replaced.

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enough fuel pressure? sometimes the pump will run but be too weak to run an engine at speed. Clogged catalytic converter?

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The only thing left is a bad injector or possibly a valve not properly seating. Those particular engines do tend to have injector issues.

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Pull out the fuel pump relay and start the engine, let it run till it goes dead. fuel pressure relieved!

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99 tahoe want start..


From what you describe, it sounds like a fule issue, not an igniton issue. Check the fuel pressure at the service port to make sure you're getting the right fuel pressure. Could be your pressure regulator malfunctioning or possibly clogged injectors if you have high mileage on the vehicle.

Aug 09, 2008 | 1999 Chevrolet Tahoe

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1999 Chevy Tahoe 5.7


http://www.arb.ca.gov/newsrel/nr021103.htm



Try reading that, it might be part of your problem... and if you already replaced it then check your Ignition control module...

Aug 05, 2008 | 1999 Chevrolet Tahoe

2 Answers

99tahoe


check your fuel pump pressure 90-00 has fuel pump problems check your fuel pressure and see if its up to spec's on that year, Hope that helps you out...

Jun 14, 2008 | 1999 Chevrolet Tahoe

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