Hi
3.4 S.C. headers exhaust ,warbro pump, 7th inj ,160deg tstat,trd air filter,elbow removed.
I am not pulling codes or showing a problem on my scan tool..
under med 1/2 pedal exceleration the truck is not pulling it is like the ecu is giving timing(fuel) then taking it away.. If I leave my foot in the same position after 2-3 sec it will smooth out to a nice acceleration..
gas milage is still good.If I dump some 104 in the tank it does get better. I am using 92-93 fuel Amaco or cheveron only.I cleaned the air flow sensor and the throttle body it did seam to help some. the O2 was replaced about 2 months ago.
when I put it to the floor it goes pretty good but I felt it pull better in the past.. I never reset the ecm after the O2 was replaced or the maf/tb was cleaned...I figured that the ecm can figure it out.
not sure where to go from here since there are no codes.....
m

 

Pull the neg battery cable... Reset the ECU. It does make a difference.

 

I will give it a try..
the ecu is in closed loop driving in every gear it went in open loop for about 5 seconds..
thanks for the reply

 

Ditto on that advice.

 

x3 on resetting the ECU, sometimes it will screw stuff up. Do you have a way to measure your AFR? I have had my ECU go way lean on me, and resetting the ECU fixed the problem... I need to fine tune my fuel maps more.

 

no way to measure afr at this time..
stupid question... where is the fuse? in the cab there are 2 fuses for ecu I think thay are labeled ecu-a and ecu-b one is 7 amp and 15 amp I think.

 

You can just pull the pos. battery cable off for a minute or two. The fuse I pull is under the hood, labeled EFI. It's a 15amper.

 

My supercharged 4Runner did what you described when the clutch was going out.The slipping started in 4th and worked its way to 2nd. I only got 5k miles from a brand new OEM . I've since put a stage 3+ spec clutch on it maybe this clutch will last longer.
Good advice on resetting the ECU though hopefully that will solve your issue's.

 

I always thought you pulled the neg cable.

 

Hmm, I don't really know if it matters which battery cable you pull... Of course you could just pull both, or pull the 15A EFI fuse...

 

That should do it.

 

pulled the fuse last night.. I will drive it after work and see what happens.
thanks for the replys