subaru help please

1. bonkersmk1 Regular Poster Joined: Jun 2010 leigh Posts: 277 9ltr saxo vts with flux capacitor mk7 nissan mi

   #1 18th July 2010, 23:23

   my 95 wrx has a misfire and a back fire trough the intake, i have mods including fmic,k+n, 3in staight trough turbo back exhaust and a remapped ecu with 17 psi boost, i have tried to replace plugs and turbo, the plugs are very sooty (over fueling??) i tried the afm (unplugged it) and it stalls but when started again with afm unplugged the misfire goes and revs as it should..... when plugged back in the problem is back i got no error codes too and tried a reset..... spent hours under the bonnet all weekend .....HELP THIS IS SENDIN ME NUTS
2. bonkersmk1 Regular Poster Joined: Jun 2010 leigh Posts: 277 9ltr saxo vts with flux capacitor mk7 nissan mi

   #2 18th July 2010, 23:33

   cmon some 1 with brains
3. Stevo123 Established Member Joined: Apr 2009 Redcar Posts: 1971 2000 Posi Blue vtr

   #3 20th July 2010, 13:47

   I think you have diagnosed the fault already as being the AFR. However you might get a better response from a Scooby forum, those guys will have more of a knowledge base than here about the Subaru. Good Luck with it
4. bonkersmk1 Regular Poster Joined: Jun 2010 leigh Posts: 277 9ltr saxo vts with flux capacitor mk7 nissan mi

   #4 22nd July 2010, 10:50

   changed that m8 got some good info off scooby forums
5. Stevo123 Established Member Joined: Apr 2009 Redcar Posts: 1971 2000 Posi Blue vtr

   #5 22nd July 2010, 11:38

   Cool, good luck mate
6. VTSjames Established Member Joined: May 2010 Immingham, Lincolnshire Posts: 1406 mk1 VTS (track), Mondeo Titanium X Tdci

   #6 22nd July 2010, 21:59

   Quote:

   Originally Posted by bonkersmk1 my 95 wrx has a misfire and a back fire trough the intake, i have mods including fmic,k+n, 3in staight trough turbo back exhaust and a remapped ecu with 17 psi boost, i have tried to replace plugs and turbo, the plugs are very sooty (over fueling??) i tried the afm (unplugged it) and it stalls but when started again with afm unplugged the misfire goes and revs as it should..... when plugged back in the problem is back i got no error codes too and tried a reset..... spent hours under the bonnet all weekend .....HELP THIS IS SENDIN ME NUTS

   hi mate , i use to have pulsar gtir and i had exactly the same mods, fmic, induction, uprated boost, exhaust etc etc... i also did what you did and unplugged the afm which made it run just as it should, it turned out to be that the air flow metre was getting to much resistance causing all the troubles you are getting. i got my mate to run a new earth in and earth it directly to the chassis with a very well cleaned surface.. after this it ran better than ever
7. bonkersmk1 Regular Poster Joined: Jun 2010 leigh Posts: 277 9ltr saxo vts with flux capacitor mk7 nissan mi

   #7 24th July 2010, 15:16

   cheers mate al av a look
8. bonkersmk1 Regular Poster Joined: Jun 2010 leigh Posts: 277 9ltr saxo vts with flux capacitor mk7 nissan mi

   #8 31st July 2010, 16:33

   pressure pipe ad come off pump !