You bet Karl, looks like your on your way, and as long as you cut the groove at the 15 degree it won`t go threw. This is my favorite one to groove as it is thick and easy to get off and on. I`m glad I could help , Keep doing the mods!!! Dan gadgetman Mo.

Okay, groove is done





Right out of the box, before the ecu reset. Went from 14.2 mpg highway to 18.5mpg highway and I think it will be doing better on longer trips.

Fuel trims
Short pre 1.6 post -3.1
Long pre -14.1 post -11.7

Load_pct% pre 22.4 post 16.5 (I find this is an indicator of performance +/-, lower the number the better)

MAP pre 10.9 post 9.5

There is a monitor setting on the ScanGuage II that calculates Gallons per hour based on fuel consumption.

At idle, pre .380GPH post .30GPH

I have reset the ecu and will be going back out later this evening so we will see what the learning curve will be.

I also have not moved the PCV off the manifold yet, although prior to this I had reduced the flow of the tube to a .050" hole. I will move it off completely this weekend.

There was one spot on the TB that I thought I was going to break through and I did.

Filled that puppy up giving it a new design.




Happy to be a Gadgetman

Karl Fortner
Tacoma, Wa.
Gadgetman Tacoma

Karl,
Nice pictures! I have a 2004 with the 5.3 that I send in to have it grooved. I have reset the computer and my fuel trims are -3 to +5 and long are +8. What I am think is the location of the groove is off? I do not have any codes past or upcoming.
Thanks,
Dave

Hi Dave,

Have you done anything with the PCV line or checked any of your other vacuum connections.

The efficiency of the Groove as far as MPG gains is dependant on the vacuum in the manifold. The higher the vacuum, the more efficient the groove and the engine.

Also, this is not a performance enhancement, it is a efficiency enhancement, performance is a secondary gain.

The more the throttle plate stays in the groove area the more you will get out of it.
Since you do have a ecu scanner, check your throttle position at idle... usually 'TPS'

Note at what angle it is set at while idling. You can pull the TB off and while still plugged in turn your ignition switch to the on position ( do not start the engine... ain't gonna work, heheh) monitor your scanner and manually position the throttle plate to the idle position and check that against the groove edge. The groove should be just below the throttle plate at that time.


But definitely go through and check your vacuum lines and the PCV if you have not done it yet. That more than likely may change things for you.

Karl Fortner
Tacoma, Wa.
Gadgetman Tacoma

Dave, the computer may not have totally reset. Try resetting again and make sure the long fuel trims are 0 If the shorts are hitting neg then the long will learn. Karl is right about pcv,that should gain some mpg don`t be agressive at first on the driving pattern as it takes much longer to learn to cut fuel. Dan gadgetman Mo.

Hey Karl, this is GadgetmanNebraska.

I love your pictures of throttle body. I have done 4-5 of these I believe and what a horsepower response they have.

These are possibly the fastest mods to do, 20 to 30 minutes sometimes and they seem to cut easier than any other that we do.

I would also like to know if you have the ScangaugeII and if you do how do you get it to read fuel trims?

Keep up the good work and keep the pictures coming, very important to newcomers and people seeing the groove for the first time. GadgetmanNebraska