New engine and there is no spark from coil, no start

Tiny
RICHARD CHASTAIN
  • MEMBER
  • 1999 CHEVROLET TAHOE
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 220,000 MILES
New engine install; no spark from coil. All coils test out well, crank sensor test out well. Everything works on car was driven into the garage. Nothing worse with new engine.
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Wednesday, February 17th, 2021 AT 6:41 AM

7 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

The first thing that comes to mind when you say the engine is new, is a ground for the coil. Take a look at pic 1. The ground for the coil driver is on the right rear cylinder head. Check that and see if you have a good ground. Here is a link you may find helpful:

https://www.2carpros.com/articles/how-to-check-wiring

Let me know what you find or if you have other questions.

Take care and God Bless,

Joe
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Wednesday, February 17th, 2021 AT 6:47 PM
Tiny
RICHARD CHASTAIN
  • MEMBER
That got it. Thanks guys, you're awesome.
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Friday, February 19th, 2021 AT 1:57 PM
Tiny
DOLEARY6666@AOL.COM
  • MEMBER
  • 1999 CHEVROLET TAHOE
  • V8
  • 4WD
  • AUTOMATIC
  • 200,000 MILES
When it rains heavily my 99 tahoe won't start. I checked today and am not getting a spark. I have put in a new: distributor cap, rotor, plugs, wires 3-4 years ago(they look ok). Where do I look next? Only when it rains do I have this problem?
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Friday, February 19th, 2021 AT 2:00 PM (Merged)
Tiny
DOCFIXIT
  • EXPERT
Pull coil wire see if spark is present. Fuel pump stay running?
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Friday, February 19th, 2021 AT 2:00 PM (Merged)
Tiny
DOLEARY6666@AOL.COM
  • MEMBER
Yes,
I got a strong spark from the coil.
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Friday, February 19th, 2021 AT 2:00 PM (Merged)
Tiny
DOLEARY6666@AOL.COM
  • MEMBER
The fuel pump comes on when I put the key in the on position and then shuts off. It sounds like it always has. I checked my fuel pressure and had 65lbs.
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Friday, February 19th, 2021 AT 2:00 PM (Merged)
Tiny
DOCFIXIT
  • EXPERT
Let's try an experiment on a non rain day truck starting good spray water on the Cranksensor see diagram


https://www.2carpros.com/forum/automotive_pictures/198357_Graphic_399.jpg

. if good spray around DIST and coil see if you can make it fail then we'll no what to fix.
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Friday, February 19th, 2021 AT 2:00 PM (Merged)

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