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68 TT · 09-15-2009, 11:51 AM

Forgot the important part. With the 5.3 you can just pick up a 2001-up flex fuel version for the swap and as long as you install the fuel ratio sensor the converted rig can be flex fuel too.

The injectors are a little bigger and have a different pig tail connector.

On the early ones they used a fuel ratio sensor to tell the PCM how much ethanol was in the fuel mix so you could run any mix of gas & ethanol with no problems.

At some point (I think it was 2005) the newer versions deleted the fuel ratio sensor and it is all done in the PCM. It is probably about the time the reluctor wheel changed tooth count so it probably wouldn't be as simple as running the right injectors and the newer tune.

I will have to check into this to make sure there isn't a single year or application that used the newer tune and the older reluctor wheel tooth count.

09-15-2009, 11:51 AM	#13
68 TT Still plays with trucks Join Date: Jul 2009 Location: Spokane, WA Posts: 3,570	Re: Glock's new project: "Fred" Forgot the important part. With the 5.3 you can just pick up a 2001-up flex fuel version for the swap and as long as you install the fuel ratio sensor the converted rig can be flex fuel too. The injectors are a little bigger and have a different pig tail connector. On the early ones they used a fuel ratio sensor to tell the PCM how much ethanol was in the fuel mix so you could run any mix of gas & ethanol with no problems. At some point (I think it was 2005) the newer versions deleted the fuel ratio sensor and it is all done in the PCM. It is probably about the time the reluctor wheel changed tooth count so it probably wouldn't be as simple as running the right injectors and the newer tune. I will have to check into this to make sure there isn't a single year or application that used the newer tune and the older reluctor wheel tooth count.