Just Grooved an '03 Ford 5.4 Triton in an f-150 Super Crew pickup. Single barrel, cable drive TB.
Med. bit, went full depth. Also shaved/shaped downstream edge of throttle blade on Groove side.
Wasnt real happy w/ this Groove, got full depth, but got sloppy despite best effort at keeping bit steady. Guess I'll never be a Sculptor!
Prob. next time I do a Med. bit Groove, I'll slow things down some. I epoxied full outside radius of TB outboard of Groove area, but never went thru.
Disconnected batt. + cable, put jumper clip wire from + loose cable end clamp to batt. - terminal, key to run posit., headlights on, this drains out ECM adaptive memory. Left this way last night while Grooving/throttle shaping. Reinstalled TB this afternoon, re-connect. batt. + cable w/ lights off key out.
My computer relearn goes like this: Start engine, foot off gas, let warm up 10 min. Key off. re-start, watch idle RPM go up (IAC function) then settle down to curb idle. Let run 2-3 min, key off. Re-start, observe how RPM behaves, engine getting warmed up now, so RPM comes down sooner. Let run min. or two, key off. I keep repeating this, paying attention to RPM, seeing how it settles down watching for anomolies. I strictly avoid touching gas pedal AT ALL while I do first part of re-learn in driveway. When engine is fully warmed up, and Idle RPM settles down to curb idle speed w/o issues, and I've started 8-10 times, it's time to start driving.
first-back out driveway, turn down street no more than 10 MPH, pull over in about 100 ft. put in Park, lights/key off. Wait few secomds, re-start, go to corner only 10 MPH no faster, pull over turn off. Start up turn right go maybe 50 ft now no more than 15 MPH. first time to "feel" Groove!
Pull over, stop. Start go to corner maybe 15 MPH, stop. Start, turn corner start on 15 MPH sections. Do 3-4 15 MPH's turn around top of street, pull over. Long block, so can do 2 or 3 25 MPH sections. And so on this way, working around area going stairsteps up in speed 10-20-25-35-45- MPH picked out route to allow for increasing speeds like Ron says. Finally onto freeway up to 65 MPH go a mile get off next exit, coast up hill to stop, to gas station where safe to stop. Re-start, go out get back on freeway up to 65 MPH maybe 70 MPH, watching traffic go like 4 miles to exit where I can turn around and stop. Get back on, this where the FUN comes, 'cause this next part is uphill--when traffic is clear, Hammer Down Baby!
This run in this Ford, only got to go full throttle in 2 bursts, first one maybe 1/2 mile, second only 10 seconds due to traffic watching out for Mr. Law. This Ford really growls w/ Groove at full boogie!
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Brought it back home, re-checked w/scantool data streams, O2 crosscounts got significantly quicker, short-term FT's going -3 -4 a lot. O2 1 bank 2 was real sluggish before Groove now switching wider range and much faster too. I've advised my freind Sam who owns this Ford he will need to replace O2's soon, 68K orig. miles.
Looked at PCV but this one is weird, has multiple ports on PCV valve base and multiple Man. Vac. connections, may try later w/ more research. Left IAC alone for now.
Lastly did the Tailpipe Sniff--Hot Air just tiny trace of odor!
Yup, we'll take That TOO!
I think this will be another Groove Success. will share more when I have it.
Tracy G