[Emerica88]

New to the forum. Just bought 91 prelude si. 3 codes being thrown. Map sensor, o2 sensor heater and ignitor. When it sits at idle sounds like it's suffocating and not firing very well. To me sound like map sensor has to do with the idle and suffocating and the firing it might need cleaned and gaped plugs or new wires and plugs. Input? Also leaning towards plugged agr valve. Thanks

E.

 

[Andrew]

The first thing that comes to my mind is a vacuum leak. That would throw the MAP code, do weird things to the idle, and I think it could potentially make the car run lean enough to throw an 02 sensor code.

Now the ignitor code, I know nothing about that. But I'd probably start by looking for a vacuum leak.