They can fix the SEL, a dual octane let you run both 87 and 93 it will reference different spark table base on knock depending on octane. I have never really looked at the form(I do my own tuning) your best bet is to call the shop and they will ask you everything they need to know. I would recommend just getting a tune for the highest octane available in your area.
Step 1. crus at it.
Step 2. get a hammer.
Step 3. torch it.
On the form the dual octane is for 87-89 and 91-93, not 87-93. 87-93 would make sense, but 87-89 and 91-93 seems kind of pointless.Originally Posted by trx2stroke4life39
2000 GMC Sierra 5.3L 4x4 ECSB
On the contrary the real world only allows for a certain amount of fudge room for learning and there is no way you could have a standard static tune that could get the best performance over the 87-93 range or everyone would get it and there would be nothing else.
Yes, but doesn't the computer already have tables ranging from 87-93 octane? I would think an aftermarket tune would be able to replicate this also.
2000 GMC Sierra 5.3L 4x4 ECSB
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