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Ray Stuck Posted on Aug 28, 2013
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2001 Silverado 1500 5.3 won't start. replaced fuel regulator, pump, crank sensor. I have spark, engine fires once, then nothing... Fuel pressure shows 50psi with key on...

1 Answer

Stephen

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  • Chevrolet Master 21,873 Answers
  • Posted on Aug 28, 2013
 Stephen
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Does it try to start by using starting fluid in the intake ?
I'm fairly sure fuel pressure should be 55-65 psi so 50 may be low.
Do you loose spark as the engine is cranking ?
Any trouble codes stored in the computer ?

  • 1 more comment 
  • Ray Stuck Aug 28, 2013

    I replaced Fuel pump back in november along with the fuel filter. I looked up the specs on the pump I put in, saya it should be 85 to 100 psi, I'm getting 50.This time around I did not replace the fuel filter..Could it be the issue? I dont have a code reader, I will try starter fluid in the morning to see if it behaves differently.

  • Ray Stuck Aug 28, 2013

    I replaced fuel filter, blew out fuel lines, no change... it will run if I use starting fluid. I connected pressure gauge straight to the pump and read 85 psi, still reading 50 psi at the rail.

  • Ray Stuck Aug 30, 2013

    Final update,,, A mechanic told me 50psi was too low at the rail, this seems to be a common "wrong". 50psi at the rail is more than sufficient. I finally took it to a shop, the problem ended up being the pass-key box for the remote starter unit that was installed 11 years ago. The box went bad and made the truck go into theft mode which shuts down the injectors. Removed the box, reprogrammed the key, runs great.

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5 Related Answers

psds4

pat murray

  • 293 Answers
  • Posted on Sep 23, 2008

SOURCE: 1997 Chev Cavalier hard starting

it sounds like the check valve in the fuel pump is letting the fuel bleed back into the tank

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Anonymous

  • 1 Answer
  • Posted on Oct 07, 2008

SOURCE: car won't start

There is a recall on this model for problems with the Engine Control Module/Coil Pack. This causes the engine to not start. Take it to the nearest Saturn dealer and get it repaired free of charge. This problem can eventually burn up your catyletic converter which will lead to much more costly repairs. There are actually 3 recalls on this vehicle. Take it to the dealer and get it taken care of. It will be like driving a new car once the repairs have been made!

Anonymous

  • 1 Answer
  • Posted on Dec 18, 2008

SOURCE: 2000 chevy blazer, truck cranks

Does your battery go dead?

jetfixr

  • 220 Answers
  • Posted on Jan 16, 2009

SOURCE: fuel pressure problem.I replaced the fuel pump on 2001 chevy s-10

Most fuel injected vehicles have a relay that controls the fuel pump so after the ignition switch has been on for about 5 seconds and the engine is not running, the fuel pump automatically shuts off.
I don't know what your original problem was, but I think if the car runs normally, you have probably fixed your problem. If you don't have a manual, you can probably go to the library and take a look at a manual that covers your vehicle.

Anonymous

  • 1 Answer
  • Posted on Sep 02, 2009

SOURCE: 1997 astro 4.3 vortec v6 fuel pressure problem.

have you made shure there is fuel in the tank, they had alot of problems wth sending units on that year. if so chances are its the fuel pump. try banging on the bottom of the fuel tank while sombody tries to start the vehicle, if it starts replace fuel pump. faulty regulators will usually cause a very rich running condition.

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Related Questions:

0helpful
1answer

2001 1500 engine turns over but will not start

sounds like fuel pump or fuse or relay cheack for fuel preasure at injector rails if you have fuel preasure then check to see if you have spark at plugs if not replace crank sensor.
0helpful
3answers

Vehicle has to crank for several seconds before turning over. Is this a symptom of a fuel pump malfunction?

HI there not all the time it could be clogged fuel filter
Or pressure regulator.
Put first replace fuel filter and see if engine starts normal. OK

good luck

ziggyone
2helpful
1answer

I have a 2001 chevy silverado 1500 with a 4800 vortec engine. it starts and idels fine but when ever i give it gas, the engine starts to sputter and dies. ive already changed the fuel filter and spark plug...

This sounds llike weak feul pressure, the fuelpump may need replacing, the first thing to do is have the fuel pressure tested and if the pressure is low then have the pump replaced. the pump is located inside the fuel tank and the tank will need to be dropped to replace the pump, good luck ,
0helpful
2answers

Tried to start my 02 Silverado and power comes on but no crank.

Could have been stuck injectors or low fuel pressure. If it happens again have fuel pressure check and fuel pressure regulator and fuel pump.
0helpful
1answer

Wont start, no spark anywhere

Check the spark, remove the fuse to the fuel pump and remove one of the spark plugs. Connect the plug to its lead and position it well away from the engine against the truck frame (do not hold it) and turn the engine over, check the spark. If no spark it most probably a faulty coil. Check the impedance of the spark plug leads and replace any that are much higher than the rest. My guess is that you have spark but no fuel, What?... OK this is what I think is wrong. Your pump is fine when at position 2 on the ignition switch however when you switch to position three to fire the engine the power to the fuel pump is momentarily disconnected. A leaking fuel pressure regulator or injector would drop the pressure in the fuel line and at the same time flood the engine making it impossible to start. Once you start the engine with ether the ignition is back to position 2 and the pump can make good any loss in pressure but because the intake mix is rich this will cause the engine to run rich too. A good fuel system is capable of delivering 40 - 50PSI of fuel pressure and when switched off up to 90% of this pressure should be maintained for about 5 minutes, if it cannot check out the fuel pressure regulator and injectors. The fuel pipe should be capable of filling a pint pot in about 15 seconds, if it cannot check out the fuel filter is clogged.
Hope the above gives you some pointers
0helpful
1answer

Starting problems

you may need to get the fuel pump tested for proper voltage and pressure
2helpful
2answers

1997 Chevy Silverado 1500 4x4 will not start. Getting spark checked all fuses, changed rotar - spark plug wires,

Have you checked the fuel pressure? Fuel pumps are a common failure item on those trucks. Pick up a cheap fuel pressure gauge and hook it up to the shrader valve on the fuel rail. With the ignition on and you should have 55-65psi. Even if it's a few psi below spec it could stop the engine from firing.Once you determine the fuel pressure isn't adequate make sure you have a good power and ground at the fuel pump. If that checks out, time for a new fuel pump module. I recommend only replacing it with an AC delco unit, I've heard bad stories about aftermarket replacements.
You could also spray some carb cleaner or starting fluid in the throttle body and crank the engine over. If it runs for a few seconds after spraying starting fluid in you know you have a fuel delivery problem.
0helpful
3answers

The fuel pump pumps but on start up it dies

Flel regulator will only affect max fuel pressure only will not cause it to not start. try replacing fuel filter first if still does not get fuel then you need to see if it is fuel related or if you have a spark at the spark plugs, pull off a spark plug boot and put screw driver in it hold 1/4 inch away from bare metal and crank engine if you get a spark then it's fuel relateed if no fuel it can be the crank shaft sensor or the cam shaft sensor. let me know if it has fire.
0helpful
2answers
0helpful
1answer

Takes multiple times to start

I think you have a faling fuel pump or a bad pressure regulator allowing fuel pressure to bleed down when the engine is off.
Try this test - When you start the car for the first time of the day, turn the key to "ON", wait a few seconds, turn the key off. Wait about 15 seconds, turn the key to "ON" again, wait a few seconds. Then wait one final time for 1 seconds and try starting the car. If it starts right away, that means fule pressure is bleeding of due to a bad check vavle int he fuel pump, a bad fuel pump or a bad pressure regulator.

The reason for the procedure is because when you turn the key to "ON", the fuel pump runs for 2 seconds and then shuts off if the engine is not running. The 15 seconds wait is for the power and fuel pump relay to cycle off before it will run the pump again.

Let us know how the test comes out. The fuel pump is in the fuel tank and hums when it is running.
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