code 34 heelp meeh

[MrFeesLaw]

To nissanfreaks point, the sulfer smell would have to be the cats. The smell may get stronger or weaker depending on driving conditions of the car, but bad cats will disrupt the exhaust flow. If you are able, I would recommend removing them and getting test pipes. This may even help fix your rich condition .

On my phone now so cant see what year your car is, but if it's older than '96 it only has 2 o2 sensors, which means there is no sensor behind the cat. If it is 96 check with a scan tool for codes, it should tell you which cat (if not both) is bad, but I would still recommend replacing both, but if u can diagnose which cat is bad, it will tell you which set of cylinders is running rich, which will cut hour diagnosis time in half.

If your car is older than 95, see if one pipe seems louder, or if is feels like it is pushing more air out (feel with your hand at end of muffler) The quieter on (or one with less pressure coming out) is the bad one, and i would look at that half of the engine for your rich condition.

[z.Leinbach]

Would that also kind of cure the farty tone?? Or is that a natural sound of the Z. Also when I redo the injectors could I do stock TT size without a tune?

[z.Leinbach]

so yesterday i peaked inside my combustion camber... an horry crap the tops of the pistons were black and rocky looking with carbon build. so im gonna be swapping out my spark plugs i used oe heat of ngk iridiums, which it has ran fairly well with them, but i think im going just use the double plats, and do a wynns fuel injection serv and see how it turns out. would it be benificail to run a hotter plug then stock calls for?

[nissanfreak12]

Would that also kind of cure the farty tone?? Or is that a natural sound of the Z. Also when I redo the injectors could I do stock TT size without a tune?

No, any changes to the fuel injectors will need a tune. Otherwise it will run like crap and cause a ton of issues.

[z.Leinbach]

Oh ok. Sweet lol what sensors should be replaced to cure a rich condition?

[nissanfreak12]

O2 sensors, Coolant Temp Sensor, Fuel Pressure regulator, Injectors spraying too much/leaking, MAF, throttle position sensor, etc... There are quite a few that will cause a rich condition.


Why do you think you have a rich condition? Have you checked the ECU for codes? Is it because of the black soot? Personally you need to find why you don't have a complete burn, that is what is causing the black soot inside the engine. A rich condition will cause a bad cat, black smoke, fuel smell out exhaust. Basically like its always running cold. A little bit of black soot is ok in an engine with a few miles.

[z.Leinbach]

Well other then less than desired fuel mileage, carbon foulded plugs, rough idle, an piston tops as black as a wicked soul, would probably be considered incomplete burn, I've mixed a quarter tank of fuel with a few bucks of regular, it made a difference, ran alittle smoother and pulled a fair bit harder, than with 92.
The only ecu code I get is a 55 or still the wonderful 34 lol

[z.Leinbach]

Oh an no soot just condensation, I've also noticed that my plenum has fresh oil in it but not enough to lower the oil level, is this normal for our cars durning winter time warm ups?

Also going to do. Wynns fuel system flush/service on payday get some of the carbon cleaned up, and some of the oil out of the plenum, then I'll get into replacing the little things. Good brands of sensors on our cars? An also what is a good coil for our cars?, 26 years an 140k I'm sure they are losing ther umpfff, also whats the phase 2ptu look like