The main issue i have is Stumbled Acceleration issues on and off mainly in low gears from 0-60 mph
Sometimes gets so bad if you press harder on the gas throttle absolutely nothing happens, then it will kick up 10 sec later...and most likely jerk the car a bit.
Ive about given up as to what the problem is......except the vaccume test failed one of the tests....
I put new mufler on,,new exhaust manifolds bank 1 and bank2,, replaced all 4 O2 sensors....assuming i put them in the righ place lol..
tested the front purge valve with 12 v and it clicked,,,,the purge vavles over the enginge seem to be working but not tested...
I did have issues with leaks on the new exhaust manifolds siince it didnt fit right,,,but i plugged some of them up with the high temp paste,,,may still have some minor leaks though...and the tailpipe to the cat had some issues too, but i think that has stopped leaking..
i put sealer on and a new donet gasket...
the car ran better before i put a new vaccum line on with the leak just leaving open... I am putting in a replacement ECM computer when it gets here to see if the computer may be been messed up?
Regards
Corbin
https://www.icloud.com/sharedalbum/#B0BGkb0P0o0d0D
I’m going to add this,,,the exhaust manifolds I purchased were cheap eBay parts,,,,compared to getting the original OEM style exhaust,,,same with the pipes…the original manifolds were about 400 to 600 each…the cheap ones were only 180/bucks each,,,probably why I had so much issues with it aligning with the engine block
You have to take off those exhaust manifolds and install them right. Also fix any exhaust leaks.
Think about what's happening here.
Your engine's pistons are pushing (combustion) exhaust gases out of each of your 6 cylinders on their exhaust stroke.
That's creating a "pulse" of pressure into your exhaust.
Even though these "pulses" are occurring with the engine spinning at between 800 and 3,000 rpms, between the pulses the pressure in the exhaust drops. It allows outside air to enter the exhaust system (through the exhaust manifold leaks) before it reaches your upstream O2 sensors.
So you're "blowing out" exhaust gasses through the exhaust manifold leaks and at almost the same time (between pulses) "sucking in" air.
Your upstream O2 sensors aren't adjusting fuel trims based on combustion exhaust gases anymore. They're adjusting fuel trims based on whatever unnatural concoction the exchange of exhaust gases and "outside air" those exhaust manifold leaks are creating.
Maybe fix the exhaust leaks BEFORE you break the seal on that box containing the new ECM
I’m currently adding a new charcoal canister because I’m pretty sure the old one is shot…
when I’m done doing this,,,I will re-check the exhaust manifolds for leaks with my vacuum cleaner and soapy water…but I’ve had horrible issues with putting them on,,,and before I put any high temp manifold paste on they were all leaking like crazy,,,no matter how hard you tightened the bolts on…..I even switched the gasket to the original OEM style,,did nothing….basically my lesson to learn here is don’t buy eBay crap ever again…it is no where near looking compared to the original Toyota OEM spec….if I find they are still leaking I will rip them off and through them in the garbage and I guess save up for an original OEM style…the studs have to be replaced as well cause I used an impact to put them on and stripped the studs a bit….I think I got the pipes sealed using a donut gasket and high temp gasket maker,,which I put on the end of the pipe BEFORE I put it on,,thus the donut gasket is sealed with the pipe before tightening….I had to use a crow bar to align the primary pipe after the secondary was put on cause the pipe didn’t align 100% but once you got the bolt through it aligned itself….