1991 240sx problems

[240_all_day]

well i got 240sx with a ka24de in it. so far the engine has been rebuilt, i got new new maf sensor, injectors, spark plugs, cap and rotor for distributor.And I still have a poblem, the car won't go over 2500 rpms. I'm totally lost right now.

[PapaSmurf2k3]

That screams "limp mode". Is there any Check Engine light on? Does it go up to 2500 relatively quickly and then stop taching up abruptly?

I would guess MAF, but since you said that already, I just don't know... try unplugging the MAF and seeing if it makes any difference. Check the wiring to the MAF, and check your grounds.

[240_all_day]

well i unplugged the maf it seemed to do the same thing. then i checked the wires in the maf. the white line, when i put power into it started to rev futher. Where does the white wire go too??

Modified by 240_all_day at 3:09 PM 3/4/2009
Modified by 240_all_day at 3:09 PM 3/4/2009

[PapaSmurf2k3]

the white wire goes directly to the ECU.

[240_all_day]

alright, i'll fix that thanks for the help

[PapaSmurf2k3]

the FSM (available through the link in my sig) should also show which PIN that wire goes into on the ECU diagram... if you need to know that.