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No spark at all?

Tiny
AYME
  • MEMBER
  • 1999 CHEVROLET SUBURBAN
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 150,000 MILES
2 months ago, I had codes checked because of a slight miss. O2 sensors and CKP sensor came up. Changed those. Still started and ran. Still had slight miss. Changed rotor and distributor cap. Figured would change CMP sensor while I was in there. It would not start afterward. Had spark then. Changed plugs and wires. No start. Checked fuel pressure. Was low, changed fuel pump and filter, battery, starter which was bad. Put in a new distributor. New ECM put in-twice. Have changed coil 3 times, CKP 3 times, CMP twice. Have checked as many ground wires as I can find. Had spark to coil and plugs till I put the throttle body back on and the next morning, no spark at all. Still no spark.
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Tuesday, September 12th, 2023 AT 12:03 PM

24 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
It sounds like the distributor is not installed correctly so the timing is off. Here are the instructions on how to install the distributor correctly. Check out the images (below). Please let us know what happens.
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Tuesday, September 12th, 2023 AT 1:33 PM
Tiny
AYME
  • MEMBER
  • 15 POSTS
The distributor was checked, checked, checked again, and checked again when it was put in.
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Tuesday, September 12th, 2023 AT 2:37 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
Okay, do you have power at the positive side of the coil (pink wire - key on).

This guide can help:

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Also, do the same test for the pink wire on the fuel injectors, I would check all fuses in the vehicle and here are the engine wiring diagrams so you can see how the system works.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

The wiring diagrams show which fuses to check the PCM and ignition system. Check out the images (below). Let us know what happens and please upload pictures or videos of the problem so we can see what's going on.

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Wednesday, September 13th, 2023 AT 11:02 AM
Tiny
AYME
  • MEMBER
  • 15 POSTS
Yes, power to positive side of coil and yes power to fuel injectors. Have checked all fuses multiple times.
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Thursday, September 14th, 2023 AT 7:53 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
Can you please remove the coil wire and position it close to ground, about 1/4 in. Gap, (do not hold the coil wire). Have someone crank the engine over while you check for spark. Let me know.
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Thursday, September 14th, 2023 AT 11:31 AM
Tiny
AYME
  • MEMBER
  • 15 POSTS
Remove the coil wire off the distributor? And check for spark from coil?
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Thursday, September 14th, 2023 AT 2:51 PM
Tiny
AYME
  • MEMBER
  • 15 POSTS
Yes?
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Friday, September 15th, 2023 AT 7:31 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
Yes.
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Monday, September 18th, 2023 AT 10:23 AM
Tiny
AYME
  • MEMBER
  • 15 POSTS
No spark from the coil.
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Monday, September 18th, 2023 AT 11:16 AM
Tiny
AYME
  • MEMBER
  • 15 POSTS
Darn, glad I'm not just doing one little piddly thing per day!
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Tuesday, September 19th, 2023 AT 8:15 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
Okay, now remove the wires from the coil and use a test light on the negative side of the coil while cranking the engine over it should flash. Also, you should have power on the positive side of the coil, please check this guide out:

https://www.2carpros.com/articles/how-to-test-an-ignition-system

Please go over this guide and get back to us.
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Wednesday, September 20th, 2023 AT 5:46 PM
Tiny
AYME
  • MEMBER
  • 15 POSTS
Ours is not a Coil over plug. Ours is a single coil with ignition. Control module on the side of the coil.
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Thursday, September 21st, 2023 AT 10:31 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
Yes, I understand that, but the test I sent is the same for any coil.
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Saturday, September 23rd, 2023 AT 10:26 AM
Tiny
AYME
  • MEMBER
  • 15 POSTS
Okay. With 3 wires coming into the coil. Ignition, tach and control signal. Which side is the negative side. I will assume the pink wire is the positive side.
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Saturday, September 23rd, 2023 AT 11:43 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
Yes, the pink wire is the positive side of the coil.
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Sunday, September 24th, 2023 AT 10:16 AM
Tiny
AYME
  • MEMBER
  • 15 POSTS
Not what I asked. Asked which side is the negative.
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Sunday, September 24th, 2023 AT 12:05 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
Sorry, the opposite side of the coil, which is either white wire should tell you, remove the connector to test. Also, I have seen the coil driver module go out and cause this issue as well. Here are the coil and module wiring diagrams so you can see how the system works. Check out the images (below). Please let us know what you find.
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Monday, September 25th, 2023 AT 8:58 AM
Tiny
AYME
  • MEMBER
  • 15 POSTS
Nope. No flash. Next?
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Tuesday, September 26th, 2023 AT 3:09 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
Okay, we are getting closer, you said you replace the crankshaft sensor so I will assume that is okay, if you have a scanner that can read engine RPM, I would crank the engine over to see if it is reading RPMs.
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Wednesday, September 27th, 2023 AT 8:24 AM
Tiny
AYME
  • MEMBER
  • 15 POSTS
258 on the scanner. Not on the tach.
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Wednesday, September 27th, 2023 AT 9:22 AM

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