S13 SR20 making weird noise

[nolandavid]

I have a s13 sr20 in a 95 240sx. I have recently rebuilt the motor and have been driving it for about 2 weeks. It was running good for the first week, but recently I went out to slide it and had a problem; now when I accelerate and get above 3k rpm the car starts to make a weird pining like sound.

My sr20 is stock with front mount and exhaust

I have tried to time the motor with tps plugged in and its reading around 15 motor sometimes will dip in the idle. Iv disconnected the tps and tried to time the motor. Timing dropped to around 5. Also I almost forgot, the idle air is not working when I turn the screw.

I have put new plugs and have adjusted fuel pressure.
any input? Thank You

[Mikester]

What is a pining noise?

[ultimateirving]

So you need to time it right before any more driving.
There are lots of write ups on how to. Just make sure you follow them And get the car to timing mode.

Second the iacv idle can only be adjusted while th vehicle is In Timing mode. So do them together.

[nolandavid]

Okay, thanks any idea on why my sr would fall out of timing? I check ecu for codes just got 55.