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My 1989 gmc 2500 sle sierra wont start iv replaced in the distributor the cap rotor and ignition switch reset computer checked all fuses and it still wont fire theres no spark from any plug the distributor or the coil and the injectors wont put out any fuel it ran fine yesterday but wont start today
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I WOULD CHECK IGNITION FUSE TO SEE IF POWER GOING TO COILS AND IGNITION MODULE. REPLACE DISTRIBUTOR CAP AND ROTOR.HAVE IGNITION TIMING CHECK.DISTRIBUTOR CAN SLOWLY WORK A LOOSE JUST A LITTLE TO THROW OFF IGNITION TIMING SO PLUGS WONT GET NO SPARK.
first you need to test circuits see where the fire is going in and coming out when you find the spot that you have no firing coming out theres your demon replace it also check your fuse if it didnt show signs of a problem befor you parked it make sure you ignition relay or fuse isnt blown also check your ignition control moule and pick up some call them stators
listen to see if you can hear the fuel pump running in feul tank. if running then check electronic fire box to make sure it it not loose,if loose it will not be grounded good and will not run or run bad(back-fireing
The distributor cap and/or the ignition rotor most likely have a crack somewhere and the distributor cap should be replaced along with the ignition rotor. The ignition module could have been damaged as well as the ignition pick-up coil/stator and if replacing the distributor cap and ignition rotor does not solve the problem then the ignition module or the pick-up coil/stator assembly inside of the distributor is also most likely damaged and the distributor will need to be replaced. There is a certain procedure for removing and replacing the distributor, and the ignition timing is not adjustable and it is not set using a timing light or with the engine running, and if you do have to replace the distributor Let me know if you require the procedure to properly remove and replace the distributor or if you require any further assistance.
Get a manual from an auto parts store specific for your vehicle. In it, you'll find exploded parts diagrams and step by step instructions on how to replace those parts
Check your fuses (ECM) and also recheck your wire leads to the coil. Your ICM (ignition control Module) may also be bad, it's located in your distributor under the rotor. You can have that tested also to make sure it's working 100%, there common to go bad from corrosion caused by condensation under the distributor cap.
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