Injector Slope Question...

[jcbst12]

1999 Silverado, 5.3 V8, 93 Octane tune modified with minimal Torque Management (thanks to you guys ï

[CANUCKPREDATOR]

I'd log first to see if you NEED to make any adjustments. Making blind adjustments can really make a mess of things. You have only gone a couple of tick of adjust, so its not severe, but you need the evidence to prove it.

1. You need to get fueling correct first, before spark adjustments. One thing at a time.
2. -4 is safe for a stock motor, provided it needs it.
3. Injector slope adjustment effect PE fueling as well. Without an AFR reading at WOT its risky making PE adjustments, could hurt the motor.

[jcbst12]

Well lets just say it runs like a scalded dog at -4. I think I will leave it the way it is. PE scares me a little because I figure a good hard pull with a load on it could potentially kill the motor if adjusted too high. At least WOT at -4 produce a similar engine "scream" to when it is at -2 with the stock air box on her. For example if I go -3 with the air box, not only am I out of tune with the fuel trims but it sounds like it struggles to burn the fuel off.

I know I have to check the data but since I cannot log on my Predator I have to con someone into riding shotgun with me when I make a few sprints down the freeway. I drive like a nut so it could take awhile. Ha ha.

Thanks Canuck!

[CANUCKPREDATOR]

Yeah that kinda sucks. Some guys have used video cameras to "watch" the screen.

Happy speeding