projectX4runner

I have a 90 4Runner v6 3.0 213k on clock auto tranny 4x4. It runs really rich under heavy acceleration, throws black smoke like a diesel! I have these two wires that are un plugged could anyone maybe tell me what theyre for or where they go? Ive looked all around the engine bay and cant find where they might hook up. heres the pics.
#1

#2
Not the TPS harness but that one blue wire coming out of the bigger harness. Should that be grounded??


And then is this supposed to be there?? Looks like a check valve maybe.


An one last thing is this ok for it to be grounded like this? Or is it missing wires. PO did that.


Thanks, any help would be awesome

874runnersr5

To one of these

projectX4runner

How the heck can I get back there with out ripping out the engine? Oh and would one of the sensors cause it to run like crap under heavy acceleration?

874runnersr5

haha, its at the very back of the motor.. working ontop helps. Not to familiar with the 3.slow but i know thats a temp sensor.. for what? beats me.

projectX4runner

Cool thanks. Ill look back there where I do my valve covers..

874runnersr5

oh and that orange connector, im pretty sure thats your knock sensor.

projectX4runner

Heres some video I took to show what the problem is. If I accelerate it slowly its fine but as soon as I Give it full throttle it bogs out and wants to shut off then throws a buncha black smoke along with unburned fuel..

So far Ive replaced the plugs, wires, cap, rotor, Battery cables, MAF, ECM, checked for vac leaks, checked tps (but havent replaced), checked timing, pulled codes and nothing... Since its not throwing a check engine light I have no idea...

http://www.youtube.com/watch?v=jx0afEFrleg

98_3RZ

have you checked your compression, cause i've seen a few that sounded like that with low compression (between 65-85 psi, normal is 150 and up)

projectX4runner

No, I havent since the motor sounds fine besides under heavy acceleration.. But ill look into that too thanks.