stumbling idle and backfiring, PLEASE HELP!!!!!

92_LSL · #1 08-21-2011, 12:49 AM

Ok, so the fwd legacy transmission is in the car and functioning properly without the legacy TCU or the fwd fuse in. With that out of the way I now need to focus on the more severe problem I have on my hands. The car has had an ongoing problem that I have yet to figure out. The car will randomly develop a stumbling idle and misfire quite badly. I have changed the coil packs and plugs recently and this problem still persists. When i was test driving the car it started stumbling at idle, misfiring under acceleration, and backfiring. I really need this problem resolved so any useful input would be greatly appreciated.

Joe

Conn SVX · #2 08-21-2011, 04:21 AM

I am no expert so i may get bashed for this . I had a similar problem and it was a bad injector. suspected bad gas but it was enough to clog the injector. Subi dealer replaced one injector and it was fine after that . U have tried electrical assuming you have a good coil pack so my GUESS is gas .

Tapani · #3 08-21-2011, 04:31 AM

This cured same symptoms for me:

http://www.subaru-svx.net/forum/show...t=maf+resolder

Tapani

92_LSL · #4 08-21-2011, 10:40 AM

I started the car this morning and put my fingers over the MAF and the car didn't even try to adjust the idle, it just shut off.

92_LSL · #5 08-21-2011, 04:24 PM

Ok, so I assume I need a new MAF????

92 SVX · #6 08-21-2011, 05:49 PM

if you cut off all air then it would kill it. I had a problem for a while where my intake clamp came loose and the tube slipped off soon as it did the engine would die. it was getting unmetered air.