mk2 Golf 20vT idle problem

Hi, wondering if anyone can help me.

I have a mk2 20v T bam engine code and went out for a blast the other day. On the way back it started running really rough, the idle was mental and it was misfiring quite a bit. The car starts fine but idles all over the place misfires and cuts out. Also at the same time the brakes gave up and its basically impossible to push the brake pedal down, dont know if this is related.

Any help will be greatly appreciated, thanks.

 

Does the engine run the factory engine controller?

 

Answer Toyotec, and then, check to see if you have a MAJOR vacum/boost leak.

 

It's Qpeng plug and play.

thanks.

 

servo pipe leaking by the sounds of it

 

yip was the servo pipe, thanks.

Still idling really bad tho it idles really high and doesnt want to settle.

Ive cleaned out the throotle body and its made no difference?

 

Check for leaks in other pipes connected to your entire inlet system.

 

It makes sense that its an air leak but really cant find any and now its not even starting just coughs when its turning over.