why is my truck not firing


Asked by Jul 21, 2013 at 12:35 AM about the 2004 Chevrolet Silverado 1500 Ext Cab Long Bed 2WD

Question type: Maintenance & Repair

i have changed the crank and cam sensors but my truck keeps losing fire

18 Answers

Year make model plz

7 people found this helpful.

the ground connection of the 1/0 battery cable to the chassis ground should be wirebrushed clean...the battery should be younger than five years old...with the chassis ground with a reliable source (not varying amperage and voltage) your ECM has a shot at getting it right~

8 people found this helpful.

Ok first work smart not hard scan see if any codes, or no communication no communication... be sure you have a working obd 2 port if your rig had factory security, (ie) flashing window that says security constantly, take key to dealer or quaified locksmith to test key. This truck may have a skim reader,(the key sends a signal to truck,oh ok yup you are mine ill start. If this is the case the security light will have been acting up for awile annoying flashing, stalling ,and just generally irritating. Solution replace key w proper programming recommend the dealer the reason oe parts work better and are engineered for your ride,and will give you a longer service life, you get what you pay for. Test,test,test first

2 people found this helpful.

Hope that helps

2 people found this helpful.

the security light is not flashing. do you know what could be causing it to crank when its cold but starts to sputter and then shut off and will not crank again,seems like it loses spark.

13 people found this helpful.

Do you have communication to ecm when no spark condition exists? Check grounds on back of the head on drivers side

6 people found this helpful.

Wire can be broken or been pulled inside insulation cold the insulation will soften and stretch breaking connection cold it shinks making connection again

2 people found this helpful.

Also check coil packs.

1 people found this helpful.

the coil packs are good do you know if there is a ignition module or something that could cause it to lose fire and sputter

8 people found this helpful.

Ecm runs everything

3 people found this helpful.

Connect obd 2 tool and see if you have communication,no communication computer is toast

4 people found this helpful.

I have a GMC Sierra 1500 5.0 1995 and it will turn over but won't crank it's getting fire to the coil got me spark plugs and fuel filter what else could cause it not to get fire to the distributor or not crank?!?

16 people found this helpful.

New spark plugs and fuel filter**


Having same problem 05 Silverado 4.3 sputters when mouister in air or raining then just stopped firing completely any help would be great

27 people found this helpful.

My 96 4.3 was not starting when humid or raining outside took for ever to start and when it finally did i popped the hood while it was still dark out 5:30 goint to work and heard a ticking noise as if a spark plug wire was disconnected. Then tracked it down to the ignition coil it was sparking all over the place went bought a new one and never had that problen again

On an external coil pack,the coil wire post will make oxidation if aluminum/green if brass clean w a mild sandpaper,replace coil wire and use DIELECTRIC grease to prevent moisture and reoccurring issue I moist climates.


Got Chevrolet Silverado 1500 2000 v6 .I replaced a cap and rotor crank senson and can sense modern and distribution sensor. Not fired

7 people found this helpful.

I had this problem on my 2001 Silverado 4.3 changed ecm,icu coil plugs wires cap rotor battery ground wire fuel pump crank sensor and still no spark turned out to be a fuse for inj 1

2 people found this helpful.

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