Question about 1999 Chevrolet Silverado 1500

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Injectors wont flow

Fuel injectors wont flow

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Check the fuel pressure at the fuel rail to the injectors. If none, the fuel pump is not pressurizing the system. Replace fuel pump.

Posted on Jun 02, 2009


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Starting problem have fire and fuel but still wont start changed pick up coil and ign module

If thats a TBI system..pull the duct work off and see if the injector is flowing a good stream of fuel while you turn it over..Ive seen fuel pumps run and fuel come from the line but not enough flow to make the injetor flow..

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Try changing out the crank position sensor if this sensor is bad it doesnt send the signal to the computer telling it you are trying to start the engine and the computer controls fuel flow at the injectors if it doesnt recieve this signal from the crank position sensor you will never get it started good luck and let me know if this fixed your problem thanks.

Feb 09, 2011 | 1993 Chevrolet S-10 Blazer

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I have a chevy 454 BB and it fires on 4365 but not on 1872. timing is correct and its getting spark but just wont run.

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1 Answer

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You have high return rates on one of the injectors most likely. The test run by a dealer is the fuel return rate test. It checks the injectors return flow and tells which ones are leaking fuel under pressure.

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No that would stop the spark you said you have. fuel flow anf fuel pressure are to different things. did it flow or really blast out of the line?

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1988 gmc k1500 wont start

hi, check the connections at the ecm,i think it's under pass front seat,i've had a couple of those years loose injector signal at ecm connector,if you have a test light you can unplug injectors and test across terminals ,it's a 12v signal at inj ,if lights flash on both while cranking try plugging in one at a time and see if either sprays, if one does and not the other, you would have a shorted injector

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1 Answer

Mazada 323 coupe, Replcaed Dist, have spark to all 4 plugs, Disconnected Fuel line and fuel is flowing. Still engince wont start. Could the injectors be bad>? or could fuel pump not be pushing enough...

Check the fuel pressure and make sure there's enough pressure for the regulator to open the injectors. You check fuel pressure by hooking a fuel pressure tester up to the fuel line. Low pressure=bad fuel pump. Hope this helps.

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1 Answer

I am getting fuel to the tbi but it wont spray through the injectors please tell me what is wrong with it

Add techroline fuel injector cleaner and replace your fuel filter to increase the flow of gas to the injectors. You may need to repeat the cleaner until the injectors are clean.

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