My engine wont start up why?

Tiny
BIRDMOMMA
  • MEMBER
  • 2000 CHEVROLET BLAZER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 145,000 MILES
I have a 2000 Blazer 4.3 Liter Vortex. It was running great, then for no reason and with no lights coming on and no strange noises it just shut off and we haven't been able to start it since, unless we put fuel in the throttle body, then it will start and run for just a sec until the gas burns out. We have changed the fuel pump, fuel filter, fuel pressure regulator, camshaft positioning sensor, distributor cap & rotor and still it won't start. We scanned it and there are no codes coming up. Please help, I can't afford to put it in the shop and I hate to just keep wasting money on parts we don't need !
Thanks,
Rachel
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Thursday, May 6th, 2010 AT 1:37 PM

45 Replies

Tiny
MERLIN2021
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Did you check for power at the fuel pump? When you turn the key to on, the pump should run for 2-3 seconds, does it? If not, check fuses under the hood and in the cab, also check the fuel pump relay,

If you can hear the fuel pump run in the tank I would check for spark because it sounds like a crankshaft angle sensor has failed.

https://www.2carpros.com/articles/how-to-test-an-ignition-system

Please run down this guide and report back

Cheers
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Friday, May 7th, 2010 AT 2:42 AM
Tiny
BIRDMOMMA
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We checked it again this morning and we did get a code this time. P1351, so I got a new ignition coil & ignition control module but these didn't change a thing either. Please help I am tired of running to the parts store! All fuses and relays have been tested and my new fuel pump is working great with 60-66 psi, but still wont start.
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Friday, May 7th, 2010 AT 1:35 PM
Tiny
MERLIN2021
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It still sounds like a crankshaft angle sensor here is a guide to help you see what you are in for when doing the job.

https://www.2carpros.com/articles/crankshaft-angle-sensor-replacement

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Friday, May 7th, 2010 AT 2:13 PM
Tiny
BIRDMOMMA
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Hi Mike,

Thanks for your reply to my 2000 Blazer problems. I hate to bother you but I wanted to let you know I replaced the crankshaft angle senor and the engine started right up.

I love this site.
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Friday, May 7th, 2010 AT 8:47 PM
Tiny
MERLIN2021
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Nice work, we are here to help, please use 2CarPros anytime.

Cheers
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Saturday, May 8th, 2010 AT 7:46 AM
Tiny
LITTLEMISSCHEVY
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  • 1 POST
  • 2000 CHEVROLET BLAZER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 109,200 MILES
Hello, I was driving home from work and got on to the highway ramp. I put my foot on the gas and got up to about 60mph. When I put my foot back down on the gas I would not accelerate. My car slowly was coming to a stop and my battery light was blinking. The car was making a "goo-goo, goo-goo" sound as it was slowing down with a slight vibration feeling. I put my car in park and started it back up and moved probably 30 feet and the car completely died in a busy intersection during rush hour.

A jump would not start it back up, so I got it towed back to my house. Today a family friend who works on my car from time to time said it was my alternator. I bought a new alternator, and battery. The car still will not start.

He now thinks it is the fuel pump but I can hear the pump coming on. Can anyone please help me?
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Friday, January 29th, 2021 AT 12:06 PM (Merged)
Tiny
JACOBANDNICKOLAS
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Don't let him replace parts unless he is sure. Otherwise you'll end up with a lot of money into the vehicle and it still won't go.

Before replacing the fuel pump, have him check fuel pump pressure. That way we'll know if the pump is producing. Also, I need to know if you are getting spark to the engine.

If you have starting fluid, see if it will start with it. If it starts for a few seconds and then dies, that would mean it is getting spark but no fuel.

Let me know what you find.
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Friday, January 29th, 2021 AT 12:06 PM (Merged)
Tiny
SCOOTERBABE
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  • 2000 CHEVROLET BLAZER
  • 6 CYL
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  • 190,000 MILES
It was running fine, then it started to slow down on the highway, I got it turned to a side road and it coasted to a stop. When I tried to start it, it acts like it wants to start but just won't catch. Could it be the fuel pump?
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Friday, January 29th, 2021 AT 12:06 PM (Merged)
Tiny
HMAC300
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This sounds like a fuel pump or the crankshaft angle sensor has gone out. When you turn the key to the on position without cranking the engine over can you hear the fuel pump run in the tank for 5 seconds?

https://www.2carpros.com/articles/car-cranks-but-wont-start

Please run down this guide and report back.
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Friday, January 29th, 2021 AT 12:06 PM (Merged)
Tiny
BART2000
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  • 4 POSTS
  • 2000 CHEVROLET BLAZER
Engine Performance problem
2000 Chevy Blazer 6 cyl Four Wheel Drive Automatic

2000 Chevy Blazer, 4.3L, Shut down on the expressway. I've replaced the plugs, cap and rotor. Pressure tested the fuel pump and it registered 62lb pressure when I turn on the ignition 50lb while trying to start it. I have spark. Sprayed starting fluid and poured gas straight in, still will not start. It just turns over. Battery is new also. Please help! Thank you! Bart.
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Friday, January 29th, 2021 AT 12:06 PM (Merged)
Tiny
RACEFAN966
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So what all have you checked at this point? How old is the fuel filter? What color is the spark at the plugs? If you can unplug one of the plug wires from the plug and put a screw driver in the end and put it near metal ie: valve cover and let me know what color the spark is. Get back to me and we will go from there.

Check out this guide

https://www.2carpros.com/articles/car-cranks-but-wont-start

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Friday, January 29th, 2021 AT 12:06 PM (Merged)
Tiny
BART2000
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I don't know how old the fuel filter is. The spark is blue.
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Friday, January 29th, 2021 AT 12:06 PM (Merged)
Tiny
RACEFAN966
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Well if spark is blue and you have fuel then this thing should run. Now does it sputter at all like it wants to start? I would replace the fuel filter for maintance reason's not saying it will fix your no start. So what we need to know is weather or not the injectors are opening. Is the check engine light on? Can you get a scan for codes? Do you have or can you get an injector noid light? If your injectors do not get the signal to open then you have no fuel in the cylinder and therefore no start. Get back to me and we will go from there.
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Friday, January 29th, 2021 AT 12:06 PM (Merged)
Tiny
BART2000
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Thank you for getting back to me. I do not have any of the tools you asked about but I will try to locate them. The truck doesen't even sound like it wants to start. No sputter or backfire. I plan to replace the fuel filter, but like you, I tend to believe the problem lies somewhere else. The check engine light is on but isn't it on at start up anyway and goes out when it starts, unless there is a problem. Is there a way to extract the codes, if so, let me know and I will get them. I know on some cars you turn the ignition switch on and aff a few times and count the flashes of one of the lights on the dash, but I dont know how to do that on this particulat vehicle. As for the injectors, I poured fuel and starter fluid directly in the carb, shouldn't I have gotten some sign of wanting to start? I will ask around about the injector tester light and see if I can borrow one. Thanks! Bart.
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Friday, January 29th, 2021 AT 12:06 PM (Merged)
Tiny
RACEFAN966
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Ok the only way to see if there is any codes is with a scanner sorry. As for the noid or injector test light if you get one get back to me and we will go through the test to see if the injectors are opening. You are sure you have spark right? Thanks
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Friday, January 29th, 2021 AT 12:06 PM (Merged)
Tiny
BART2000
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I am sure about the spark. I checked one plug wire on each side, screwdriver in the boot and held the screwdriver close to whatever metal I could reach on each side and turned it over and I got spark. Should I pull a plug and check for spark at the plug? The plugs are new. I'll be glad to check again. I started out with a full head of hair, I'm down to just a few strands now.
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Friday, January 29th, 2021 AT 12:06 PM (Merged)
Tiny
RACEFAN966
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Well with that said you must not be getting fuel to the cylinder. So if you would pull one or two of the easiest plugs and just make sure they are dry and not wet if you would. Do you smell gas at all when you crank it over? Have been able to get a noid light to make sure the injectors are getting the signal to open? Get back to me with what you find.
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Friday, January 29th, 2021 AT 12:06 PM (Merged)
Tiny
BARREDA23
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  • 3 POSTS
  • 2000 CHEVROLET BLAZER
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 10,000 MILES
When I start my car it takes time to start up but it starts up. When the car is in park or crusing about till 35 to 40 it shakes alot bad. But when it gets above 40 the service check engine light doesnt go off but starts to blink. When I accelerate it lacks alot of power. What should I do? Or check?
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Friday, January 29th, 2021 AT 12:06 PM (Merged)
Tiny
MERLIN2021
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First thing you need to do is have the codes read, Autozone does it free, Post the results with the code number(s). Even if the service engine light is not on, there should be freeze frame data stored.
If it won't make it to Autozone, buy a cheap scanner, they can be had for 30-40 dollars, a good investment, since they cover all cars sold in the USA from 96 on.
If the light is blinking, it means possible damage to the converter. Service it right away!
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Friday, January 29th, 2021 AT 12:06 PM (Merged)
Tiny
JWILLY25
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  • 1 POST
  • 2000 CHEVROLET BLAZER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 135,000 MILES
My blazer will not start. It turns over fine so I don't think it is the battery. It seems like it is not getting any fuel to the engine. This has happened several times in the last 2 weeks. Sometimes there is no problem but other days there is. Even if it doesn't start in the morining, later that day when I go to try it starts right up. I'm lost.
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Friday, January 29th, 2021 AT 12:07 PM (Merged)

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