7mgte stumble HELP

ccguy · 11-29-2012, 03:35 AM

there is NO difference if i unplug the O2 sensor. nothing.....?
if i unplug the tps or the afm it wont run for crap.

here is a video driving. notice at the end where it accels when i barely have the throttle cracked.....could that be my iacv sucking in air past the tb?
when i say it "bucks" it feels like as if you would pop the clutch or wot then let off. feels like it is going to break a u joint or motor mount

http://www.youtube.com/watch?v=eDLr4...ature=youtu.be

also i was thinking about the hac. as the altitude gets higher it tells the ecu there is less o2 so it reduces the amount of fuel sprayed (right?) so in theory if it is a lean fuel issue pluggin in the hac would farther confirm that due to it cutting the amount to be sprayed.
hopefully the fuel pressure gauge will get here within the next 2 days.
with the pressure gauge could i put it on before the fuel rail? basically just before the dampener or should i try it on the rail like off of the cold start inj?
i will probably try both just to see how it fluctuates

11-29-2012, 03:35 AM	#19
ccguy 3" Exhaust Join Date: Jun 2012 Location: az Posts: 50	there is NO difference if i unplug the O2 sensor. nothing.....? if i unplug the tps or the afm it wont run for crap. here is a video driving. notice at the end where it accels when i barely have the throttle cracked.....could that be my iacv sucking in air past the tb? when i say it "bucks" it feels like as if you would pop the clutch or wot then let off. feels like it is going to break a u joint or motor mount http://www.youtube.com/watch?v=eDLr4...ature=youtu.be also i was thinking about the hac. as the altitude gets higher it tells the ecu there is less o2 so it reduces the amount of fuel sprayed (right?) so in theory if it is a lean fuel issue pluggin in the hac would farther confirm that due to it cutting the amount to be sprayed. hopefully the fuel pressure gauge will get here within the next 2 days. with the pressure gauge could i put it on before the fuel rail? basically just before the dampener or should i try it on the rail like off of the cold start inj? i will probably try both just to see how it fluctuates __________________ 1980 toyota 4x4 truck 1987 7mgte motor, 3" exhaust, water to air intercooler. 4.88s locked, dual cases, lift.....