Fuel Injector replaced?

Tiny
LAVELL11
  • MEMBER
  • 2008 PONTIAC GRAND PRIX
  • 5.3L
  • V8
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
I recently changed all my spark plug with ACDelco 41162, I also change all the coil packs with ACDelco wires, and also I only change one ignition coil harness backside of engine as well, note I was getting a p0308 code nothing else, but my car drives completely fine no flashing check light at all when it do comes on its solid and still my car drives fine no shaking or rough idle at all. I did check cylinder 8 plug it was clean no damage, I tried switching coil packs to see if it jump to another spot but no cylinder 8 it's stuck on, like I said before my car engine sounds completely good, so I plugged scan tool up too check the live data inside misfire #8 jumps from 0 then go up to 4 then back to solid 0, the rest stay at 0 only. I changed my plugs out due to having a misfire 6 and 7 then 8, that's when I did a full tune but after that 8 only showing, I checked all wires everything good. I ordered another ignition coil harness for the front side of engine hopefully that helps if not I will change out all fuel Injector. I need a diagram on what I need to do to replace injectors as my next step. Thanks
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Friday, February 9th, 2024 AT 8:49 PM

7 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Hi,

I attached the directions for replacing the injectors. When you do this, make sure to replace the o-rings and lubricate them before installing them. The manual says motor oil can be used. I usually use Vaseline.

Let me know if this helps or if you have other questions.

Take care,

Joe

See pics below.
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Friday, February 9th, 2024 AT 11:11 PM
Tiny
LAVELL11
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Okay, thanks a lot for this.
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Saturday, February 10th, 2024 AT 10:13 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 107,716 POSTS
Hi,

No problem whatsoever. Let me know if you have other questions or if I can help in any way.

Take care,

Joe
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Saturday, February 10th, 2024 AT 4:37 PM
Tiny
LAVELL11
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Okay.
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Saturday, February 10th, 2024 AT 6:10 PM
Tiny
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So, when I do this job do I have to cut off any relays or etc, since I'm dealing with injector just asking before I install them look simple not hard at all just want to triple check before I do so.
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Monday, February 12th, 2024 AT 6:14 PM
Tiny
BORIS K
  • MECHANIC
  • 709 POSTS
Hello,

Prior to disconnecting any fuel pipes, I would suggest removing the fuel pump fuse or relay. Next start the engine up, it should fire and run for a few seconds on the residual fuel pressure. The fuel pump relay is located in the engine fuse block, ahead of the right-side strut tower.

Once the engine stalls the remaining fuel pressure will be very low.

You can then commence to remove the injectors.

A good video:
https://youtu.be/lP7-PVVpM-Q?si=azObhJLLAOz4j9FN

Cheers, Boris
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Tuesday, February 13th, 2024 AT 9:39 AM
Tiny
LAVELL11
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Okay, thanks a lot need that info.
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Tuesday, February 13th, 2024 AT 12:05 PM

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