Random cylinder misfire, I think it's tune related
06-30-2008 | 11:54 PM
#1
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Joined: Nov 2004
Posts: 1,653
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From: Michigan (Macomb or Lansing)
Random cylinder misfire, I think it's tune related 02 ls1 w/ torquer v3 cam (231/234 .644/.598 111lsa), full boltons.
I recently start getting a random cylinder misfire code. Honestly Ive never noticed anything. My tune runs very smooth and no problems otherwise. I tuned the ve, idle, maf, p/e, spark, etc. I am back to running closed loop (very low ltfts and stfts across the board).
I recently installed nitrous although i have only used a 75 shot once so far.
I have all new tr-6s, i recently broke 3 valvesprings (inner one of prc duals)(car ran fine, i just happened to check them and noticed 3 inner ones broken), so I replaced all of them and put all new seals in. The plugs in those 3 cylinders were all fine but i replaced em anyways.
Ive been getting the code about once every other day, Car shows no signs of misfire, but today on a decel, it made an unusual pop that sounded like a possible misfire.
How do i narrow it down? IS it possible that the misfire detection is just too sensitive for my cam? because i dont feel or notice misfires.
I haven't seen anything unusual in logs either.
I got some error about switchpoints once a few days ago, I figured it might be o2 sensors but they both seem to fluctuate normally and in unison.
I recently start getting a random cylinder misfire code. Honestly Ive never noticed anything. My tune runs very smooth and no problems otherwise. I tuned the ve, idle, maf, p/e, spark, etc. I am back to running closed loop (very low ltfts and stfts across the board).
I recently installed nitrous although i have only used a 75 shot once so far.
I have all new tr-6s, i recently broke 3 valvesprings (inner one of prc duals)(car ran fine, i just happened to check them and noticed 3 inner ones broken), so I replaced all of them and put all new seals in. The plugs in those 3 cylinders were all fine but i replaced em anyways.
Ive been getting the code about once every other day, Car shows no signs of misfire, but today on a decel, it made an unusual pop that sounded like a possible misfire.
How do i narrow it down? IS it possible that the misfire detection is just too sensitive for my cam? because i dont feel or notice misfires.
I haven't seen anything unusual in logs either.
I got some error about switchpoints once a few days ago, I figured it might be o2 sensors but they both seem to fluctuate normally and in unison.