Need Help with 5SFE! Options

[Scosh]

Hey guys, I just changed out my head gasket not too long ago. After everything was put back together I drove it around a bit and the ride was good as I expected. But a few days after I tried to just floor it to see what it would sound like(just got my exhaust done 2.5" catback and custom intake). Yeah it sounded really nice but I noticed the more the RPM rose the more power was loss, but the engine got louder at 4500RPM and it reminded me of the VTEC that Honda has. I know its a 5SFE and they are like boat anchors, but it sounds to me that my timing may be off. Heres a video of what I was trying to describe, sorry for the poor quality it was hard to try to record, steer, and shift at the same time

[stephen_lee]

actually this generation of engine DOES same small changes in the fuel map in the ecu, along with idle positions and timingg settings, and shift settings if its an auto. its in the BGB so toyota reccoments tis after work affecting engine VE.

pull the efi fuse in the engine bay. sit 10 sec for obd1 and 10 min for obd2. start car let idle 5min (auto only) put in D for 1 minute. drive at moderate throttle position (20-50%) untill 4th gear. relearn is complete. (except fine tune, which your ecu will do for up to 100 starts)


BUT this will def not cause a serious problem... lol

This post has been edited by stephen_lee: Aug 21, 2011 - 5:20 PM

[hatchy_gt-s]

actually this generation of engine DOES same small changes in the fuel map in the ecu, along with idle positions and timingg settings, and shift settings if its an auto. its in the BGB so toyota reccoments tis after work affecting engine VE.

pull the efi fuse in the engine bay. sit 10 sec for obd1 and 10 min for obd2. start car let idle 5min (auto only) drive at moderate throttle position (20-50%) untill 4th gear. relearn is complete. (except fine tune, which your ecu will do for up to 100 starts)


BUT this will def not cause a serious problem... lol

NO that only resets long/short fuel trim not you A/F ratio the only way to change that is with reprograming. Timing is also PROM.

WHY DO YOU PEOPLE THINK FUSES AND RELAYS ARE MAGIC!!! All removing the EFI fuse accomplishes is disconecting the the power from the fuel pump THATS ALL, it doesnt have magic powers that resets programs. Removing the battery does the same thing as pulling fuses or relays.

but pulling relays = no point

Same thing with fuses.

[samir0189]

actually this generation of engine DOES same small changes in the fuel map in the ecu, along with idle positions and timingg settings, and shift settings if its an auto. its in the BGB so toyota reccoments tis after work affecting engine VE.

pull the efi fuse in the engine bay. sit 10 sec for obd1 and 10 min for obd2. start car let idle 5min (auto only) drive at moderate throttle position (20-50%) untill 4th gear. relearn is complete. (except fine tune, which your ecu will do for up to 100 starts)


BUT this will def not cause a serious problem... lol

NO that only resets long/short fuel trim not you A/F ratio the only way to change that is with reprograming. Timing is also PROM.

WHY DO YOU PEOPLE THINK FUSES AND RELAYS ARE MAGIC!!! All removing the EFI fuse accomplishes is disconecting the the power from the fuel pump THATS ALL, it doesnt have magic powers that resets programs. Removing the battery does the same thing as pulling fuses or relays.

but pulling relays = no point

Same thing with fuses.

Um. the toyota manual states that removing the efi 15a fuse is the way to clear CEL codes from memory. I can upload if you want to see.

edit: i know it wont help this guy in his situation, but pulling fuses is not the most useless thing ever thought of by humanity or anything. just fyi.

This post has been edited by samir0189: Aug 21, 2011 - 8:31 PM