Quote:
Originally Posted by bushd
I purchased a 1995 Maxima apparently GXE (leather seats though with factory security but no remote so unsure about what extras specifically). I was having engine shaking so I searched around and was going to do the basics after buying a vehicle - replace plugs, filters and oil. I've replaced plugs with the NGK platinum (all had NGK except one with a bosch), air filter, oil/filter, one coil pack I busted the rubber on, and soon the fuel filter and PCV valve. The engine shakes still but it is sporatic, just as before, but less often. I can't really pinpoint a beginning and ending because there doesn't seem to be any specific event that causes it. I have listened to the tail pipe and I did hear the put put but nothing continual (muffler needs replacing, its leaking I can hear the hiss and see the corroded exterior). Diagnostic is giving no codes now (I left a coil pack unplugged and caused a cylinder to not fire, which sounded just like it does now when it has misfiring issues with the shakes, but coded knock and signal circuit. Cleared them after reconnecting the coil pack. I took it to autozone and their OBD II only gave a knock code.
I just purchased throttle body cleaner in order to clean it out but I do work quite a bit during the week and have little spare cash (just purchased this thing). I don't want to replace all the coil packs, I think one may be going bad, and I can't really unplug then individually because like I mentioned the potential misfire isn't consistent. Any ideas?
I forgot to mention the car passed inspection + emissions the night before I noticed the non-consistent engine shaking. It is enough to make the entire car shake.
I'd prefer to meet this before I throw a cel for misfire when whatever really does die.
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I had a similar problem on my 99 GLE, when i first got it the engine would shake sporadically and a buddy of mine (and trusted mechanic) told me it could be the connections on the MAF sensor. it wasnt it, he also said if it wasnt the MAF it could be a faulting knock sensor. If its faulting it can retard ur timing or speed it up thus causing a miss fire then go back to normal once it actually feels the knock.
hope this helps a bit, every car is different but every piece of info can help
good luck
