Truck getting slower

[Vasbinder]

I changed tires size from 315-75-16 to 305-70-16 same tire brand. I used the Edge's 1/4 mile timer and the truck runs in the 16's it used to run in the low 15's with the bigger tires. I cleaned the Air filter and changed the fuel filter. It had bad fuel in it I drained it cleaned the tank and flushed the fuel lines. Can there be something else plugged up past the filter. The return line at the tank looked dark and rusty color like what I cleaned out of the main line.

 

[sweetdiesel]

If you have bad fuel in the return line and rust you could of damaged the regulator / cp3 / injectors/ return fuel lines under the valve cover

 

[gmduramax]

You changed the tire size. That effects your speedo, so the edge is off on the times

 

[Vasbinder]

I changed the Edge for the tire size and used Tire Pac to get the dash gauges right again.

 

[Vasbinder]

Is there any way to test the system to find out whats bad? Like a certain part

 

[Big Block 88]

Are you basing your slower performance purly off of the edge unit?? If so those are not the most accurate calculations in the world. Or is there somthing else leading you to beleive the perfpormance is down

 

[sweetdiesel]

:stupid:

 

[Big Block 88]

:yup:

 

[Vasbinder]

Yes off the Edge. To me the smaller tires should run better I can't smoke them like the 315's even on slick black top. Even on top end it dies off. But it still beat a new Tundra

 

[Big Block 88]

I would say your edge is lieing to you and it is in your head now that it is slower. I don't trust those edge units for there timing deal.

 

[Vasbinder]

I think the Edge is making it miss at the bottom end. It clears up after a while going to send it back to fix it and try to get my money back or sell it

 

[Big Block 88]

That may be the best option, I would get PPE or EFI they are the tuning kings for the d-max