sanderjesse7 Posted February 19, 2012 Share Posted February 19, 2012 hello, i just went stage 2 and put an act hdss and lwfw, first had a cel of engine missifire 1 2 3&4, cleared the codes and is good for about 25 miles, cel came back on and now engine missfire #2 with the code of p0302, any ideas maybe a bad injector? or may this be caused by the lwfw? Link to comment Share on other sites More sharing options...
browningr6 Posted February 19, 2012 Share Posted February 19, 2012 Not sure why but after my clutch/lwfw install i had a misfire code for 3 and 4 cleared them then 3 came back and cleared it again. It hasn't came back in a few weeks so not sure what the deal was but i read a few threads on here where others were having the same issues after install. Link to comment Share on other sites More sharing options...
sanderjesse7 Posted February 20, 2012 Author Share Posted February 20, 2012 yeah im not too worried about it, im just gunna run some injector cleaner through her for safe measures. i think its cause the lwfw is soo much lighter then stock so it throws off the computer and throws a cel Link to comment Share on other sites More sharing options...
bmx045 Posted February 20, 2012 Share Posted February 20, 2012 lwfw cause random misfires. its been documented here Link to comment Share on other sites More sharing options...
sanderjesse7 Posted February 20, 2012 Author Share Posted February 20, 2012 good to know! Link to comment Share on other sites More sharing options...
bmx045 Posted February 20, 2012 Share Posted February 20, 2012 not sure how to remedy it though.... Link to comment Share on other sites More sharing options...
t1010ellsworth Posted February 22, 2012 Share Posted February 22, 2012 how many miles on your car? Link to comment Share on other sites More sharing options...
Max Capacity Posted February 22, 2012 Share Posted February 22, 2012 I think a custom tune can help. Or may be re-set the ECU and let it re-learn. 305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. (SOLD). CHECK your oil, these cars use it. Engine Build - Click Here Link to comment Share on other sites More sharing options...
bmx045 Posted February 22, 2012 Share Posted February 22, 2012 you can't relearn misfires Link to comment Share on other sites More sharing options...
robitrice Posted February 22, 2012 Share Posted February 22, 2012 just get a smfw for that application.... Link to comment Share on other sites More sharing options...
Mikee7117 Posted March 21, 2012 Share Posted March 21, 2012 I just had my timing belt done 2 weeks ago along with the plugs, out of nowhere I get this code and p0304, car is running fine as well...had it reset and will see if it comes back...just bought this car so I'm hoping for nothing serious Link to comment Share on other sites More sharing options...
bmx045 Posted March 21, 2012 Share Posted March 21, 2012 I just had my timing belt done 2 weeks ago along with the plugs, out of nowhere I get this code and p0304, car is running fine as well...had it reset and will see if it comes back...just bought this car so I'm hoping for nothing serious does it seem to only run rough or throw a cel on cold morning starts? Link to comment Share on other sites More sharing options...
Mikee7117 Posted March 21, 2012 Share Posted March 21, 2012 It doesn't seem to run rough ever to me, I've only had it for the cold weather months so maybe I don't know what rough is? If it was a bad misfire I feel like I would notice it. The only issue I've had was the hesitation under wot near 3k in 2nd and 3rd gears which seems to be improved with the new plugs. Link to comment Share on other sites More sharing options...
bmx045 Posted March 21, 2012 Share Posted March 21, 2012 sometimes its hard to feel but you'll know its a misfire code when the cel pops up and goes away on its own. though misfiring while WOT isnt a boog thing, replacing the pulgs is the first step Link to comment Share on other sites More sharing options...
ouch1011 Posted March 23, 2012 Share Posted March 23, 2012 Lwfw and crank pulleys have caused misfire codes on Subarus for a loooooooonnnnnnnnng time. It has to do with the fact that reducing the rotating mass reduces the inertia and allows the engine speed to fluctuate enough between firing impulses to trick the pcm into thinking a misfire occurred. Misfire codes can be tuned out, but I wouldn't suggest it. Link to comment Share on other sites More sharing options...
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