Question about 2000 Chevrolet Silverado

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Not firing I read your solution but i'm not sure what you mean by crank sensor.. Is that the rotor in the distributor cap.. I just replace the distributor and rotor on my sons truck to no vail. Any other suggestions?? Thanks

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  • maness2001 Sep 24, 2008

    This is for a 2000 Chevy 1500 4.3 automatic. The truck was running fine when my son took some friends to football practice. When he went to leave the truck would turn over but would not start. He has plenty of gas and the fuel pump seems to be working. We removed a spark plug wire and cranked it but we did not get a spark.. Today I replaced the distributor cap and rotor and check every fuse. I don't have help to check and see if I have spark now. I can build things and definitely tear them apart ;-) but cars are not my thing.. I know enough to get in trouble.. Thanks

  • maness2001 Sep 25, 2008

    Greetings, I talked to a guy at a local parts store and he suggested romoving the ignition module and having it tested. This was a siple item to remove. I took the module to the store and he tested it. The test showed that it was probably bad.. He was kind enough to tell me to go try the new one and if that was not It I could bring it back. (most want let you return electrical parts).... I got home and had my son crank it over and shazam it worked. I just wanted to let you know to have that module checked as one of the first things you do. It is simple to remove and parts stores can test it for you..

  • reils Nov 29, 2008

    i have a 2000 silverado 5.3 4x4 the truck quit on me this morning im getting fuel to the rails and pressure is good 60 psi but i have no spark all fuses check out ok and wiring seams to be fine as well how do i check the crank sensor and the pcm unit any help thanks

  • mcalkins3
    mcalkins3 May 11, 2010

    What vehicle, engine, and transmisson is this for?

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  • 599 Answers

Excellent

Posted on Nov 24, 2008

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My 1986 chevy van g20 cranks but wont start no fire replaced cap,rotor and coil .


I would suggest changing the pickup in the bottom of the distributor. Also crank the engine with the cap off of the distributor and make sure that the rotor bug is turning and make sure there is 12v at the coil with the key on.

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you said you repl dist cap that means you don't have a crank sensor you have electronic ing module. remove your elec ing module have it tested most auto parts stores could test your module, or check your coil at the neg terminal. should have power. if not you lost your primary volt from your batt.your secondary power is coming from your electronic ing module from the module to the pos terminal on the coil, when the eng cranks,from the coil to the dist cap , from the dist cap center to the rotor then out to the plugs,this all happen pervided the timing belt or timing chain is ok. the cumbustion chainber needs 3 things , thats fuel, air, and spark.

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My truck was running good when I parked it but now it will not fire, I have replaced the cap, rotor and coil but still not spark. I have fuel at the rail and the engine cranks. What next?


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Connect a timing light to the number one plug wire and crank the engine. Does the light flash indicating that the Number one is firing? Look at the distributor. If you have a distributor cap and rotor assembly remove the distributor cap and crank the engine. If the rotor turns check the rotor to make sure there is a good contact point and check the distributor cap to ensure there are good contacts. If either is damaged or worn replace them both. If the rotor does not turn you have a broken timing belt or one of the timing belt/chain guides has jammed and the engine needs to be rebuilt.

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If you indeed are getting no spark on any plugs, check your plug wire that runs from the rotor to your ignition coil- the one that doesn't go to the engine. Make sure the internal connections didn't pull out and get crushed back in or fall out. Try one of your other plug wires on it and see if it fires- won't run good but you will see difference and be done troubleshooting. Other than that, you bought the rotor button and and rotor as a set right? Make sure the button metal tip is contacting the cap. If you got the wrong one, it may sit too low for the contacts even if it is long enuff. If you were getting spark, I would just say you got the firing order wrong.

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1 Answer

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i would start with the basics- did you make sure you followed the correct firing order when you installed your new plug wires? when you changed the cap/rotor did you notice any track marks inside the old cap? was the old rotor burnt/corroded? ive got a 97 ram and the cap is a b*tch to get to being buried in the back, could you have inadvertently moved the rotor off its timing mark? mis-aligned the crank sensor when installing your new cap? i would recheck how the cap was installed, just because you were able to position it proper and tightened down the screws doesnt mean that you didnt accidently pinch the wires on the crank sensor, or turned the rotor off its mark. also when pressing on the plug wires on the cap did you look for the "1" mark on the cap? this is your reference point for firing order. im not sure these are you problems, but rechecking your work to make sure something wasnt knocked off-kilter, or wrong plug wire placement would confirm the problem lies other than what was replaced. i hope this helps

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