[MaximaFan4140]

Originally Posted by theallpowerfulme

Hey guys I have a little problem:

I have a 92 Maxima with the SOHC motor 135k miles, no CEL. I had a misfire develop that presents itself at all throttle positions and coolant temps. I could pull the ign wire from the middle plug on the front cylinder bank ( I think this is cyl #3?) and it would NOT affect the idle. This tells me that this is the dead cylinder, as pulling the other wires off of their respective plugs WOULD drastically change the way that the engine ran. I pulled all the spark plugs and the plug for this cyl was very fouled while the others were clean.

The following parts were then changed:

Spark Plugs
Coil
Dist. Cap and Rotor Button
Ign. Wires

After all of this, the problem remained, unaltered

I then swapped all six injectors and the rails with some from another car (and obviously replaed the intake manifold gaskets), I also replaced most of the vac lines since they were very brittle.

After this the problem remained. I then unhooked the battery for a few hours, and hooked it back up. The car ran MUCH better, with a slight misfire that was intermittent. I mean the car ran perfectly, with a slight hiccup that rarely occured.

Today the problem returned. Dead cyl, (the one I assume is #3, the one in the middle of the front bank) misfires always. I have found a couple of threads that express a similar problem, but the solution was never posted. Any ideas? Something I am missing? other threads pointed to the Knock sensor, or the coolant temp sensor, but this was never confirmed or denied. I am tired of swapping parts when they dont solve the problem. Help would be very appreciated!

Damn why does that sound just like the problem i am currently going thru with the engine thats still in my max to this day...i gave up in buying parts tryin to fix the problem when i got a spare motor...but urs does only got 132k or wutever while mines has broken 310k lol....AGED AND EXPERIENCED YEAH BABY!!!