Question about 1999 Chevrolet Silverado 1500

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1999 5.3 vortec silverado 4x4. Engine intermitient hard start.

1999 5.3 vortec silverado 4x4. Engine intermitently starts hard and runs rough for a minute or two then clears out, has new fuel filter, fuel pump and everything internal to the fuel tank is new. Vehicle has 106.000 miles on it and the filters were changed before and again after fuel pump replacement. I don't know the actual fuel pressure but the pump was changed due to low pressure and the fuel pressure supposedly returned to normal so I was told. Any sugestions?

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Had a similar problem and turned out to be a fuel regualtor.
Be careful with the little o-ring. Tricky little devil.
There may be residual pressure in the line so be careful you don't take a shower in gasioline.

It was hard to start after warm up. Rough idle until driving. Then on shut off it was hard to start.

Posted on Sep 04, 2010

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Pull the plug and inspect the color, are any of them whitish, could be coolant leaking into the combustion chamber,

Posted on May 13, 2010

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1 Answer

I own a 2001 chevy siverado z71 4x4 v8 4.8 vortec engine, Is not starting changed battery, alternator,spark plugs,and the starter is spinning the serpintine belt and its still not starting What else could...


If the engine is turning over than none of the things you replaced will make the engine"start". You will need to check for fuel pressure and spark first.

Apr 06, 2013 | 2001 Chevrolet Silverado 1500

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After running my 2000 chevy silverado 4x4 if it sits for about 30 min it dose not want start with out giveing it gas


It might be your core pack. Try getting that checked at the auto store. Or it could be a gunked up fuel injector.

Feb 27, 2013 | 1999 Chevrolet Silverado 1500

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2000 silverado 4.3 V6. Replaced feul pump and niw it starts but it takes 3-4 cranks in the morn to start it and then it runs very rough untill it has ran for 1/2 to 1 hr. Also have replace fuel filter...


The rough running should have caused the check engine light to come on. It would be a good idea to goa ahead and scan the engine for trouble codes. The rough running could be a number of things. The codes would help us pinpoint the correct part ot replace, rather than start replacing parts until we get lucky and hit the right one. That could be very expensive.

Jan 01, 2011 | 1999 Chevrolet Silverado 1500

2 Answers

I have a 2000 chevy blazer with a 4.3 vortec motor,my problem is when i'm cruising at a steady speed the engine surges it usually happens around 45-50 mph


ENGINE SURGING COULD BE WEAK FUEL PUMP, STOPPED UP FUEL FILTER,BAD TORQUE CONVERTER SOLENOID OR TORQUE CONVERTER. OR FAULTY TPS.

Dec 30, 2010 | 2000 Chevrolet Silverado

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Engine hard to start sometimes vortec suberbun 1999


it looks like you need more fuel to start your engine check for a bad fuel pressure regulator, measure the pressure it should have 55 psi less wont start cold

Dec 17, 2009 | 1999 Chevrolet Silverado 1500

1 Answer

1999 Silverado 5.3L hard to start right after turned off


First check your air filter, and change if needed. Check your engine ground connection. Check for loose connections in the ignition sysem. Check your idle control system/ sensor. Good luck, and let me know what happens.

Jun 01, 2009 | 1999 Chevrolet Silverado 1500

3 Answers

Hard to start chevy 350 vortec


You will need to do a fuel pump pressure leak-down test, the pump must not loose more than 5 PSI overnight, u will need a cheap fuel pressure test guage, the test port is on the fuel supply rail to the injectors on the intake manifold, it looks like a tire valve but metal with a plastic cap on it, u may be able to borrow this guage from Kragen, Autozone or a parts store like them, if not they are very cheap, less than $20 US. Run the engine with the test guage hooked up, turn off the engine and then check it in an hour or so, if it drops more than 5 PSI then u will need to replace the fuel pump in the gas tank. One note make sure the connection for the guage is tight with no leakage or the test is invalid

Jan 15, 2009 | 1999 Chevrolet Silverado 1500

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