Rough idle, misfire, running rich Faulty MAF?
 

I just did my heads again as they failed after 2000 miles on my GC8 STi import V3 and now I have rough idle, misfire and over fueling. The air intake is sucking like mad also. Changed plugs, cleaned idler, changed fuel pump to welbro and still no good. Use to start up fine cold, then once starting to get warm it degrades from there on until it wants to cut out. I think it the MAF sensor or O2 sensor on the down pipe.

Has anyone got a working Orange sticker MAF sensor please?

Bump

sounds very much like the maf has started to fail In my opinion.

I had similar probs recently, I cleaned the MAF sensor and idle tickover valve with brake cleaner, ran better but still got P00171 and P00030 ecu faults. I'm planning to swap the front o2 sensor this weekend. Bought it from Sandicliffe for £97...

Yeah, I've read so many posts and the problem seems to point to the MAF and O2 sensor. I can't seem to locate a Orange MAF sensor. I might be able to get you one at a better price if you PM your reg (www.creationautorepairs.co.uk). if anyone has an working Orange MAF sensor please let me know. Thanks

Just realised.....you've already brought it lol