RB25Det issue

[Jason062100]

Some time ago my Rb25 S13 started having an issue. It was idling higher than it usually would. Driving at a high rpm felt like I was getting barely any power. I posted on reddit and a lot of people said it was most likely a vacuum leak. So I did a carb cleaner test and looked for one everywhere and couldn't find anything. I was also told I should clean the IAC valve so I did that and nothing changed. Then I noticed the maf wire was laying on hot parts of the engine and it was burned badly so we bough new wire and a new maf connector and soldered all that together (I think I did it right but I could have done it wrong). Doing this did not fix the problem. I was then told we needed a new maf so we bought one for pretty cheap ($16 or 23.16 Australian dollars) and put that on the car and still nothing. It is still acting the same. Any advice would be greatly appreciated because I'm at a loss. The link below is the most recent video of the car.

 

 

[hardsteppa]

Still leaning to vacuum leak. Did you do a pressure test, or just spray carb cleaner in random spots? 

[Jason062100]

I haven’t tried a pressure test I’ll look into that, thanks.

[Jason062100]

I also don’t understand why it won’t even start with everything plugged in. It will start with the maf wire unplugged.

[GTSBoy]

When the AFM is unplugged the ECU drops back to some default limp settings that will get it past troublesome shit like f**koff big vacuum leaks.

[TerryP]

Never seen a AFM that cheap so it could be a fake.

Either way, you could try cleaning the Idle Air Controller on the back of the intake plenum, this often gets all 'carbed up' and starts to stick.
If you very carefully remove it (without dropping the screws and losing them forever) and tear it down, put some gloves on and clean all the surfaces with CRC MAF Cleaner and reassemble.

Another issue could be a faulty CAM angle sensor.

What year is the engine?

 

[Jason062100]

I did clean the Idle air controller and I think the year is 89. I’m having the exact same issue as someone else and his ecu got shorted out when the maf wire got burned. So we ordered a new ecu. If that doesn’t work out I’ll look into the cas.