Engine shaking after replacing fuel rail

Tiny
KSANDIFER09
  • MEMBER
  • 2016 CHRYSLER TOWN AND COUNTRY
  • 3.6L
  • V6
  • 2WD
  • AUTOMATIC
  • 160,000 MILES
While doing some work under the hood, I broke off the inlet port going to the fuel rail. I purchased a brand new fuel rail. I bought new o-rings for the injectors and installed them into the fuel rail and put everything back together. When I start the van, it is now running very rough and after about a minute acts as if it is going to shut off. I shut off the engine. Tried again and the same thing happened. The check engine light has come on but I don't have a code reader and I can't drive the van to get it checked. Help if you can.
Thursday, September 3rd, 2020 AT 11:35 AM

5 Replies

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Clearly we need the codes to be sure but it sounds like you either have a vacuum leak or issue with the fuel rail/delivery. So we need to check both and go from there.

Here is a guide on how to check for a vacuum leak:

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Here is a guide for testing fuel pressure:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Let's check both of these and go from there. Also, if you have any friends that have a code reader, can we see if we can borrow it because getting the codes will cut this down to what the issue is and then we can just go to that. Thanks
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Thursday, September 3rd, 2020 AT 11:50 AM
Tiny
KSANDIFER09
  • MEMBER
  • 4 POSTS
I went and bought a code reader. Disregard the 2nd picture. After resetting the check engine codes, I'm getting two of the same codes. P2172- Throttle actuator control system sudden high airflow detected.
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Thursday, September 3rd, 2020 AT 1:01 PM
Tiny
KSANDIFER09
  • MEMBER
  • 4 POSTS
I have found this blue retention clip (located in picture) while going back over everything. However, I cannot find where it could go. It's not the fuel line retention clip because it was white and it is on there. It could have come off of something else, or an extra. Just wanted to throw that out so that I could check everything again. I really appreciate your help.
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Thursday, September 3rd, 2020 AT 2:07 PM
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
That looks like an electrical connector lock clip. In other words it is what holds the wires in the connector and not let them back out.

I attached the testing for this code. I suspect something is left off so I can only suggest going back over what you took off. If you can't find it then run through the testing attached and you should find it.
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Thursday, September 3rd, 2020 AT 6:25 PM
Tiny
KSANDIFER09
  • MEMBER
  • 4 POSTS
I believe I fixed the issue. The top of the intake manifold wasn't seated correctly causing too much airflow. I reset the check engine codes and doubled checked everything. I secured the manifold back down and started the van back up. It sounded and ran 100% better. I drove it several miles and it doesn't appear to have any issues and no codes showing up. The blue clip is still a mystery. I sincerely appreciate your help.
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Thursday, September 3rd, 2020 AT 7:30 PM

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