Question about 2000 Chevrolet Blazer

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Good fuel pump, engine turns over but wont crank.

Fuel pump is good, has good pressure but will not crank. Pour fuel in throttle body and it will crank but then goes dead.

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If u pour fuel in the throttle body n cranks then goes dead u may want to check your fuel injectors see if they're actually working , u say your fuel pump is good maybe not the injectors

Posted on May 27, 2009

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Check for spark. Pull a spark plug wire, put a screw driver about a quarter inch from it, and crank engine.

Posted on May 27, 2009

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1 Answer

Engine wont start but its in fuel system


When you turn the key to on, not start, do you hear the pump turn on for a couple of seconds to pressurize the fuel system? If you do, check fuel pressure with a gauge, should be over 50 psi if multi port injection, about 20 psi if throttle body injection. If pressure is good, you may need to check the fuel injector circuit.
If no sound from the pump, you will need a voltmeter or a test light to check the fuel pump circuit. First check the fuel pump fuse. Then check for power at the gas tank on the fuel pump wire, when the engine is being cranked over. Power should be going to the pump then. If nothing, move back to the fuel pump relay-need to check for power at the relay.

Nov 23, 2013 | Cars & Trucks

2 Answers

96 tahoe . It will not crank up unless I pour gas into the throttle body . Once it cranks it will run untill I shut it off but want crank by itself . Why


First, lets be clear with terms. To crank is to turn the engine over, you can do this manually with a wrench on many vehicles. It requires no spark or air. To turn over or to fire is when you achieve combustion. Example: You could pull the spark plugs on a vehicle and turn the key and it would crank, but it wouldn't fire or turn over.

Now it sounds to me like your vehicle is cranking but not firing unless you pour gas in it. My first thoughts are fuel system. I'm assuming it can't be fuel pump because it runs once it fires. Perhaps the fuel pump isn't priming itself, or perhaps somehow air is getting in the line between the injector and fuel pump? Test the fuel pump first by turning the car from off to on (not starting, just on). You will usually hear a short buzzing noise coming from the engine bay that stops shortly afterwards, that's your fuel pump pressurizing the line. (Pro Tip: If you ever try to take your key from off to straight to start and the vehicle doesn't start on the first try, but does the second time no problem, try delaying at on for a moment before trying to start. This gives your fuel pump time to pressurize the line.) Assuming your fuel pump is charging the line, the next place to look would be at the path the fuel takes to the throttle body. When you crank it over and it doesn't start, are you getting any fuel? If you can't see where the fuel enters the system try smelling the exhaust while cranking without it firing, if it smells of fuel you're good and need to look at air flow and spark, if not it's a fuel issue.

Past that, I'll leave it to someone more experienced than myself, but that would be how I troubleshot my own vehicle.

Oct 17, 2013 | Cars & Trucks

2 Answers

My 1998 dodge neon wont start until i pour gas in the throttle body then dies out when i press the gas


What is the fuel pressure when the engine is running ?
Has the filter been replaced ?

Aug 16, 2012 | 1998 Dodge Neon

1 Answer

1985 grand Marquis acts like not getting fuel to start but if I pour gas directly into throttle body starts right up and runs what could be problem


Runs on the gas you pour in, or keeps running until you turn the key off ???
If the fuel pump relay fails, you would have to crank the engine until you get oil pressure to provide power to the fuel pump.
Do the injectors spray when you are cranking it ? Have you checked fuel pressure when the key is turned to start ?

Jul 11, 2012 | Cars & Trucks

1 Answer

I have an 89 s-10 Blazer with a 2.8L and it wont start unless i pour fuel down the tbi. i have replaced the fuel filter and i can hear the fuel pump when the key is off and when if is on when i hook up...


The regulator is built into the throttle body. Recommend you crack loose the fuel inlet nut on the throttle body to see if fuel is getting there. If yes, the next question would be, are the injector solenoids clicking? If you can, put a long screwdriver on the solenoid and hold it to your ear while someone cranks the engine. If it's clicking, rebuild the throttle body. If not, use a meter or scope to check the signal to the injector. If there is a signal, replace the injector. If no signal, suspect ECM or one of it's input sensors. These sensors would normally set the engine light if the ECM is not getting a useful signal from them. If you have more questions, please let me know.

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Oct 24, 2010 | 1989 Chevrolet S-10 Blazer

2 Answers

1998 chevy tahoe 4x4 wont start. not getting fuel to throttle body. its not a fuel pump relay i tried it. it will start if i pour gas in the throttle body


fuel pump or fuel pressure regulator. When you turn the key do you hear fuel pump run? If not odds are the pump is bad.

Aug 23, 2010 | 1998 Chevrolet Tahoe

1 Answer

93 wrangler 2.5 will crank but won't start. I pour gas down the #1 cylinder and put the plug back in and it will crank for about 8 seconds then sputter to life and idle and run fine. Shut it off and try to...


Yes...check the pump, filter and output. Also check the ballast resistor for the pump. Stop pouring fuel into the cylinder...instead, use carb cleaner and spray into throttle body (excess fuel in one cyl will contaminate your engine oil). If it runs normally after you get it started likely the pump is good (unless you have problems at high rpm's under power) Regulator is likely good as well...default is to more fuel not less.

Oct 07, 2009 | 1994 Jeep Wrangler

1 Answer

Fuel supply


sounds like there is no power to the fuel pump while cranking. check the oil pressure sender this helps the fuel pump run under cranking

Oct 13, 2008 | 1998 Chevrolet Tahoe

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