Intermittent engine cranks no start the injectors?

2003 HUMMER H2

135,000 MILES • 6.0L • V8 • 4WD • AUTOMATIC

MARK GEBO

MEMBER
2 POSTS

I had a random misfire. So, i replaced the injectors. With a very cheap set. After that I started getting crank no starts. So, I replaced the injectors with new OEM. I also replaced the fuel pump, filter, pressure regulator, engine coolant temperature sensor, crankshaft position sensor, camshaft position sensor, mass airflow sensor. I’m still having the crank no start issues. Shops cannot figure it out. I didn’t have this till cheap injectors.

Jan 30, 2023 at 8:04 PM

STRAILER

✓Experienced Mechanic
55,256 POSTS

Has the shop or you run the codes? You could have a PCM going bad due to the injectors, if there are no codes, I would try swapping out the PCM which you can get a preprogrammed unit by searching Google or Ebay. Here is the location so you can do the job.

This guide can help you get the codes:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Check out the images (below). Please let us know what happens.

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Jan 31, 2023 at 2:20 AM

MARK GEBO

MEMBER
2 POSTS

I will try to get a PCM ASAP. It will be a couple days. Is there anything else I could try? It doesn’t do it every time. And the shop did run a computer to it. It has no codes.

Jan 31, 2023 at 8:18 AM

STRAILER

✓Experienced Mechanic
55,256 POSTS

I assume the shop checked all fuses, correct? If not check these as well, also do you know if the shop did a CAN scan? You can get a CAN scanner (Controller Area Network) from Amazon.

Here is a video to show you how:

https://youtu.be/u-4syLc-ifQ

and

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Let me know how it goes.

Feb 2, 2023 at 5:04 AM