I see on strait gas you’re LTFT was reported at -20 with the big injectors.

Was that at idle or driving around?

4 tanks later you started hitting 30 at idle. What was it at idle before you started coding for it
too lean at idle?

Our intake system was not designed for boost. Maybe it’s as simple as you blew a cracked hose off your intake manifold under boost.

MAF wise a good sealed up MAF reading at a 700rpm idle will be .500 lbs per minute for an NA engine. You can convert that to grams if your scanner is in metric.

For E85 you should be shooting for around 10:1 AF. When you mention lamda is it for gas or e85?

Just my ideas…..it’s how my brain works.


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