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When I bought the car 6 mos, and 4-5k miles ago, I pulled off intake manifold, EGR valve and hard pipe, walnut shell blasted the intake valves (pain in the ass, but worked great) and the EGR pipe and valve, installed an oil catch can, and put it all back together. No leaks, so don't ask. Sent...

No vacuum leaks. No mods. Newly installed OEM upstream O2/AF sensor was bad, it seems. Got it warrantied by dealer, reinstalled new one, no problems, yet. 300 miles and counting..... Sent from my iPhone using Tapatalk

No mods Sent from my iPhone using Tapatalk

No mods. No logs. Too irregular to b a vacuum leak. Gives P0171 code once every 1-100 miles, then clears ok. Over and over. Sent from my iPhone using Tapatalk

2010 Mazdaspeed3. 88k miles. Getting intermittent P0171 code, lean bank. Have replaced plugs (Ngk perfectly gapped), coil packs, cam and crank posit sensors, MAF sensor, and even the upstream O2/AF mix sensor. Still getting code. Occasionally. Totally random. 10 miles. 30 miles driving...

I'll probably go back to stuck plugs, stretched springs already when I installed the cam and crank pos sensors. With a gap that wide, risk of blowout? Sent from my iPhone using Tapatalk

I'm looking all over for non-oem coil packs for my gen 2 MS3. Can only find for regular mazda 3. Nopal? Accel? Weaponx? Do these all fit gen2, as well? Car has slight miss under different loads, speeds, throttle, acceleration. Sometimes very apparent to any car guy in car, sometimes subtle...