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My 4.3 vortec wont start turns over good. - Cars & Trucks

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2000 GMC s10 4.3 v6 vortec wont start. Turns over but wont start please give all reasons why it wont. Ive replaced fuel filter, spark plugs are fine, fuel pump works,


Check spark at the spark plug by putting a screw driver up the cover hold it close to an earth and get some one to crank it over ,the spark should jump to earth.

Jun 01, 2015 | GMC Cars & Trucks

1 Answer

99 gmc sonoma wont start


Engine cranks (Turns over) & will NOT start ??
Engine will not crank (Turn over) ??

Feb 21, 2014 | 1998 GMC Sierra

1 Answer

I have a 99 jimmy with the 4.3 vortec. I have spark, and 61 pounds of fuel pressure. when turned over it act like it starves for fuel and is so close to starting but wont even with starting fluid. I d


It can take 70psi to start a vortec engine cold. It should start on starting fluid tho.
You might want to look at a couple of spark plugs to see if they are in good enough condition to run. The spark could be weak under compression if the plugs are worn.

Aug 05, 2012 | 1999 GMC Jimmy

2 Answers

Problems starting a 2000 Sonoma 4.3l vortec engine


It could be a bad fuel pump located usually under the rear of the vehicle on either passenger or driver side. Or you need to replace the fuel filter may be plugged up.

Good Luck!

Feb 07, 2010 | 2000 GMC Sonoma Extended Cab

1 Answer

1996 gmc k1500 4x4 5.7 vortec motor no start keep


Replace the coolant sensor on the front of the intake manifold.The coolant sensors on this engine does go bad and wont set a check engine light. The sensor will read about -32 to 0 degrees when they do go bad. The computer thinks it is that cold and sends tons of fuel to the engine. If you try to start the engine with the throttle depressed to the floor it puts the fuel system in clear flood mode and wont fire the injectors. Engine will start then and run very rich. The coolant sensor has two wires on it and sometimes you need to replace the wiring pigtail going to it as the sensor can seep coolant into the connector and corrode the terminals. All the parts are available at pepboys and autozone or napa. Good luck

Jan 05, 2010 | 1996 GMC Sierra

2 Answers

I have a 1999 gmc Yukon it is getting fuel and spark i even sprayed starter fluid in the intake but it still wont start it turns over good but wont start


ok make sure you have good fuel pressure
you must have good spark must fire a spark tester
if all that is good then check compression
and don't use STARTER FLUID on a GAS ENGINE it can blow a hole through the piston
hope this helps

Nov 12, 2009 | 1999 GMC Yukon

1 Answer

Wont start 1996 tahoe 1500


SOUNDS LIKE YOU HAVE CONECTOR PROBLEM .CHECK ALL CONECTIONS AT COMPUTER. SPECIALLY POWER AND GROUND . CHECK FOR BURNT PINS AT COMPUTER . IF ALL GOOD YOU SHOLD REPLACE ECM.

Feb 01, 2009 | 1996 Chevrolet Tahoe

2 Answers

1996 silverado 5.7 vortec cranks but wont start. fuel pump, gauges, "idiot" lights, blinkers do not work. flashers and all the rest of lights operate. Just replaced coil and this happens


Had the same problem with my '96 Silverado with 350 Vortec. The truck would only crank. It would start if fuel was poured down the throttle body. Could not hear the fuel pump hum. Fuse was good, but could not hear relay click. Relay was good, Did some electrical wiring trouble shooting. Turned out that one of the connectors that clasp onto one of the pins of the fuel pump relay wasn't making a good connection, too loose. I just stuck a peice of wire into the connector and pushed the relay back in. Relay clicked, Truck Started. It's been more than 4 yrs. since I made that McGuyver fix. Still firing.

Jul 26, 2008 | Chevrolet Silverado 1500 Cars & Trucks

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