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2004 murano misfire under load
ok, i have a 2004 murano 3.5, bought it use, had a few, well a lot of problems, so, changed both valve covers and pcv, plug oil seals where leaking, had one bad coil, got a set of new coils and plugs, original ones, used to have a code p0300, now its sometimes pending, once we replaced all those parts, it was fine for the first ride, after that, i get misfire or hesitation under light load or coasting, way to much gaz, not a real electrical misfire, idle or full throtle, no problem, things we founds, intake was full of oil, its smoking a bit, cat are empty, compression is betwen 130 and 138 all cylinders, we checked timing, cams are fine, the chain didnt jump, fuel pressure is 42 and higher on rev's, got the factory manual, its perfect, injecter where cleaned and tested, there all spraying fine and none are leakings, we had a 02 sensors bad that we changed, did the re-learn procedure, now, on o2 sensors, the readings are fine, on a/f sensors, bank 1 short trim ( long trims confirms it both) average is around 0% on driving normaly, but, on bank 2, average is a wopping 25%, but no code on a/f malfunction, just a pending 0300 sometimes when we try to drive it nicely, gas consumption is......like a v16 (drive computer says 32 ), we tested with propane for vacum leaks, none, all the vacum lines seems at the rigth places, im really getting desesperate, have an obdb car doctor for readings
Last edited by claudedunn; 04-23-2017 at 03:53 PM. |
#2
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That compression sounds pretty low. I think normal compression is around 185 psi with a minimum of 142 psi, if my memory serves correct.
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#3
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yes
yep, its 4 psi low, but difference betwen high and low is in spec, start nice even at -25 celsius, got plenty of power when you hit the accelerator, just doest want to cruise or accelerate lightly without jerking , it did once when we replaced the plugs and coils my son in law and me when we took it out for 20 minutes, we do suspect the A/F bank 2 25% average being the fault, but its not sending a code ?
revised our notes, all cylinder where at 178 except 5 at 172 Last edited by claudedunn; 04-24-2017 at 01:31 PM. |
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2004, load, misfire, murano |
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