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99 silverado 4.3 wont start

Replaced brain, also crank sensor cap, rotor,wires,coil,mod inside distrubter and still no spark.

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  • Cars & Trucks Master
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Auto shutoff relay..it controls fuel pump and ignition..does the pump come on with atempt to start?

Posted on Dec 26, 2013

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Posted on Jan 02, 2017

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SOURCE: died while driving

while engine is running grab the wire harness that leads into the distributor housing with a pair of needle nose pliers and wiggle the wires!!
if the engine stumbles or stalls that is your prob!!!
go to parts store and get a magnetic pickup assembly!!
i think they call it something else but its the same concept, just different because it's a dodge thing!!!

Posted on Jun 18, 2009

SOURCE: 99 chevy 1500 5.7 missing on 3 4 6 replaced tp,

Not much else it could be you have renewed just about everything. How about the coil sets? How healthy do the sparks look? try swapping some the faulty cylinder coils around with those that are good and noting the shift in misfires. The coils get hot and suffer over time. I think if you examine the sparks from each plug in turn you will see big differences from good to poor. For safety disconnect the fuel pump relay when checking the spark we don't want any fires.

Posted on Sep 18, 2010

app_3rp42787
  • 1 Answer

SOURCE: wont start

yes

Posted on Sep 03, 2012

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I have a 2002 Chevy Silverado 1500 it will crank but wont start I replace spark plugs spark plug wires rotor and distributor cap I also replace ignition coil ignition control and brain box


did you check that the cam shaft is turning ( broken timing belt /chain)
did you check to see if the immobilizer was working correctly
did you ruj the fault codes before replacing the ECM which would have had all the reported fault code stored ready for a read so that you would know where the fault was

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do you have injector pulse? the "hall effect" you mentioned is the camshaft position sensor it times the injectors to the ignition fire. the coil is actually triggered by the crankshaft sensor . is the rotor turning while starter is engaged, if not the drive gear pin could be sheared and not getting the spark out to the wires.GOOD LUCK.

Jun 11, 2012 | Cars & Trucks

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No spark


First does the rotor turn when cranking engine?? possible timing chain is out or stripped gear..are you sure it has no spark??did you verify this with a high output spark tester ? did you spray starting fluid in the tbi unit ?

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No spark from the coil, I have replaced it and the moduel, the wires, plugs dist, cap rotor cap, cam shaft sensor, crank shaft sensor. still will not start up. Check for spark at coil no spark, What else...


Your either not going to believe this or hate me for it. Your ECM has a "cold start" circuit with a special set of commands to start the car when cold. It might have lost the command to fire the coil.

Jul 02, 2011 | 2005 Chevrolet Silverado 1500HD

1 Answer

99 chevy 1500 5.7 missing on 3 4 6 replaced tp, map, wires cap rotor fuel filter spark plugs injectors cam and crank sensor


Not much else it could be you have renewed just about everything. How about the coil sets? How healthy do the sparks look? try swapping some the faulty cylinder coils around with those that are good and noting the shift in misfires. The coils get hot and suffer over time. I think if you examine the sparks from each plug in turn you will see big differences from good to poor. For safety disconnect the fuel pump relay when checking the spark we don't want any fires.

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Crank sensor is dead get a new one have it replaced/ Cam sensor controls gas / Crank sensor controls Spark

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My car wont start but will crank and thers no spark


Look to the source of the ignition spark that supplies all 4 spark plugs. The ignition coil supplies spark to the rotor and the rotor sends spark to each individual spark plug wire via the cap and rotor. If you are getting no spark check the cap and rotor for wear and then go to the coil and see if it is malfunctioning. If all of that fails then the sensor suppling the signal to the ignition coil is probably to blame. Usually the Camshaft or Crankshaft sensor that feed signal to the ECM or the ignition coil. Be methodical, follow your way down the line and check everything and you'll find the problem for sure!

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Wont start


Do you have fuel pressure?? There should be a service port located on rear of engine fuel rail.

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