Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Hello and welcome!My name isCustomerand I can assist you with your question.
Have you checked for codes in the computer?
Does the ignition coil have power while cranking?
Sorry, I lost connection for a bit.
If there is no spark coming right out of the ignition coil, then lets check for a signal to the coil from the ignition control module. You could simply just have a bad ignition coil.
If there is no spark coming out of the ignition coil at all when cranking and it does in fact have full battery voltage to it, and the ignition module is not sending a signal to the coil, then it is likley the ignition module or crankshaft position sensor is at fault. Just be sure that the computer is "awake" with the key on. You can verify that the check engine light comes on with the key on for a bulb check to ensure the computer is powered up with the key on.
Ok, do you have a signal from the ignition module to the ignition coil while cranking?
So have you checked for a signal from the ignition module to the ignition coil while cranking?
Sir, the signal sent from the ignition module to the ignition coil is a ground signal trigger. You can use a test light to check this. But only you would hook it up backwards. Hook the alligator clip of the test light and hook it to battery positive, and take the tip of the test light and touch it the signal wire of the coil. (If you need a diagram let me know). The test light should blink when cranking over the engine if its getting a signal.
It will be the white/black wire.
I would check it at the coil.
Ok, if not, then the ignition module is not sending a signal to the coil.
Do you have a scanner that can read live data? If so, does it display engine rpm while cranking?
YES, look for a security light on or flashing on the dash
Ok, thats normal. I would say the securtiy system is not an issue.
No Sir, those fuses only get power power at certain times.
In addition, the fuses you need to be concerned with are on the wiring diagram I have provided.
You need to ensure that the ignition coil has FULL battery voltage going to it while cranking and then check the signals in and out of both the new crank sensor and cam sensor inside the distributor. YES, the pickup inside the distributor could be bad as well.
Sir, you need to check the signals from the cam and crank sensor. You may not even have voltage to the crank sensor. Have you checked this? This can and will prevent the engine from having spark.
You dont need "another reason" why there is no spark. You need the "main reason" why there is no spark. By running these tests I have provided, it will point you in the "right reason".
Hello! It'sCustomerfrom just answer.
I am just checking in to see if you need any further assistance?
If so, please let me know and I will be happy to help!
Sounds good. No problem.
Please dont forget about me.
I will be looking forward to your reply!