Ly6 to l96 swap running rich

Reid Krabill · June 16, 2020

My 2009 ly6 blew up at 248,000 I had my mechanic buddy drop a low mile 2010 l96 in it. Now I'm getting p0172 code for running rich on both banks. Truck seems to run fine. What do I need to do? Got about 100 miles on it so far.

CamGTP · June 16, 2020

Did you use your old LY6 injectors?

Reid Krabill · June 17, 2020

I have the l96 injectors still in there. I have the original injectors , should I use them? Will the intake have to be swapped too?

CamGTP · June 19, 2020

The L96 injectors may be larger than your old LY6 injectors. The L96 is flex fuel so they are larger than the non flex fuel injectors.

Your fuel rail will be fine, just swap the injectors back.

Edited June 19, 2020 by CamGTP

Reid Krabill · June 19, 2020

I think I'm going to go ahead and try to swap the injectors. I've read this on other pages as well...mostly people theorizing. it's very hard to find any information from people that have actually done this swap. One other source I found was reporting problems with running too lean. My truck seems to run excellent. What's the worst that can happen if i keep running it this way?

CamGTP · June 19, 2020

If it ran rich all the time it will burn through way more fuel than normal and slowly kill the cat converters because of the extra fuel running through them.

I would say swapping the injectors will help a lot.

Edited June 19, 2020 by CamGTP

Reid Krabill · March 17, 2021

On 6/18/2020 at 9:34 PM, CamGTP said:

If it ran rich all the time it will burn through way more fuel than normal and slowly kill the cat converters because of the extra fuel running through them.

I would say swapping the injectors will help a lot.

Sorry I never updated. The injector swap fixed it. Ly6 to l96 was direct bolt in. Very easy swap just had to use ly6 injectors on the l96