Deft86, what is fsm? And do you have a sc3 or 4?

 

Full service manual. My car is a 92 SC300

 

I have a 92 sc400 w 1jz swap i experience all these symptoms just no lag at all car idles rough in drive and reverse symptoms seem to go away after car is warm and been running for a while. ive searched for answers in the past and evryone seems to have a possible answer but i havent seen anyone who has actually experienced the problem and found the solution.

 

Your problem sounds like a ect issue.

 

Ok so I pulled the maf plug off and started it and it would barely stay on at this point(with it plugged in it will idle just idles rough).

I also disconnected both of the o2 sensors on the manifold and it seems to run better. It was driveable. I have no found a way to test the o2(mine is a single plug). Any ideas?

 

Who replaced the maf sensor and ait sensor? Do you know that the ait sensor is part of the maf sensor?

 

Download the manual here.

http://www.filecrop.com/37749757/index.html

 

I replaced the whole maf assemble with another one. Yea I know the iat is inside of the maf housing.

 

Wow thanx a lot man, Im downloading it now.

 

02 sensors rarely fail. Have you checked your fuel pressure? You said the car was lean. Car is going to use the o2, ect, maf, and tps to decide how much fuel the car needs. Check the pressure, fuel pressure regulator maybe a clogged fuel filter

 

I put two used (but good o2 sensors ) in it and cleaned the plugs off and now it runs fine for now. Ive put about a hundred miles on it and its been good so far. I cant believe that it was a stupid o2 that made it run so bad. The plugs were really dirty(just put new ones in about a month ago) so I cleaned them and they seem to be good.

Thanx a lot for all of your help guys.

 

howd you clean your plugs. i hope u just sprayed them off. i know idoits that use sand paper and what not and then call me saying they now have a misfire.

 

I let them soak in brake cleaner and used a wire brush to clean them off. I have done that plenty of times and had no issues after doing so. like I said the plugs were only a month old, I didnt see the point in purchasing new ones.

 

I WANNA HAVE YOUR BABIES!!!!!!!!!!!!!!!!!!!! (not really I have a weiner) I've looked so long for this and tracked down a ton of outdated links. But now its here, i finally have it

 

Wow randomly started doing it again after not driving it for two days. Back to the drawing board.