Averying's 2009 Platinum Graphite 370z Journal

Averying

Same here… DIY mechanic, little single bay garage, harbor freight tools, etc. I’ll figure it out eventually haha


Sent from my iPhone using Tapatalk

__________________
2009 Sport Touring | Platinum Graphite | GTM Stage 1 Supercharger | BC BR Coilovers | Hotchkis Swaybar | Z1 FUCAs | AME TM-02 Wheels | Z1 2-piece Front Rotors | Z1 Clutch & Flywheel | Invidia Gemini Catback | GTM Resonated Test Pipes

Averying

Pulled the plugs to compare and am realizing they all look to be in fairly sh**ty condition. Looks like I’ll be ordering some plugs!

Hopefully there isn’t another issue still persisting that would quickly foul a new set of plugs as well (assuming that new plugs fixes the issue)




Sent from my iPhone using Tapatalk

__________________
2009 Sport Touring | Platinum Graphite | GTM Stage 1 Supercharger | BC BR Coilovers | Hotchkis Swaybar | Z1 FUCAs | AME TM-02 Wheels | Z1 2-piece Front Rotors | Z1 Clutch & Flywheel | Invidia Gemini Catback | GTM Resonated Test Pipes

Rjk370z

Sub'n. Nice write up.

__________________

Averying

My hunt to find the culprit of the misfire continues. My theory: it MUST be the injectors right? Can’t be spark plugs.. can’t be the coils… See full write up below:

Things I tried:
-Cleaned the throttle bodies
-Recleaned the MAFs
-Cleaned the injectors with the method of hooking up a can of carb cleaner, connecting to a battery and firing away. A couple of them seemed to spray a bit rough on first try but it instantly became a uniform spray. I also backsprayed them during the cleaning process. Also installed new O-rings.
-new spark plugs
- put in 3 gallons of fresh 93 and a bottle of Techron fuel system cleaner. The tank was almost empty so this is a pretty strong dose of Techron.

Now I’m getting most misfires on cylinder #4 and a couple misfires on cylinders #3 and #5 as well. When I reinstalled the injectors and coils, I didn’t put them back in the cylinder they came from. I reinstalled them randomly. That’s a mistake on my part.

So once I saw it was misfiring on cylinder 4, I swapped the coils between #4 and #2 (#2 had no misfires). The results didn’t change at all.


Sent from my iPhone using Tapatalk

__________________
2009 Sport Touring | Platinum Graphite | GTM Stage 1 Supercharger | BC BR Coilovers | Hotchkis Swaybar | Z1 FUCAs | AME TM-02 Wheels | Z1 2-piece Front Rotors | Z1 Clutch & Flywheel | Invidia Gemini Catback | GTM Resonated Test Pipes

Averying

As expected… bad fuel injector is the culprit!

Cylinder #4 was misfiring and cylinder #1 had no misfires. Swapped the injectors between the two and voila. The weird thing is that in between swapping the injectors, I tested it with the carb cleaner method and it seemed to spray normally and it wasn’t leaking… weird.

Now I’ll be looking to get these injectors cleaned since I cannot replace them. I don’t see a 600cc Denso option on the market for the 370z which is what came with my GTM Stage 1 kit.





Sent from my iPhone using Tapatalk

__________________
2009 Sport Touring | Platinum Graphite | GTM Stage 1 Supercharger | BC BR Coilovers | Hotchkis Swaybar | Z1 FUCAs | AME TM-02 Wheels | Z1 2-piece Front Rotors | Z1 Clutch & Flywheel | Invidia Gemini Catback | GTM Resonated Test Pipes

Averying

Turns out the culprit injector is electrically bad (internal solenoid has failed) and a few others are likely on their way out.

From the people I’ve talked to, ive only heard bad things about these denso/Deatschwerks injectors. Maybe the new DW stuff is better since it looks like it’s a Bosch ev14 based unit, but the drilled denso injectors seem to be pretty unreliable.

Going to be picking up some Bosch 1000cc injectors and retuning to car. Can’t wait to get this thing running again!


Sent from my iPhone using Tapatalk

__________________
2009 Sport Touring | Platinum Graphite | GTM Stage 1 Supercharger | BC BR Coilovers | Hotchkis Swaybar | Z1 FUCAs | AME TM-02 Wheels | Z1 2-piece Front Rotors | Z1 Clutch & Flywheel | Invidia Gemini Catback | GTM Resonated Test Pipes

Averying

Finally got the Z up and running!

Installed a secondhand set of 1000cc Southbay Fuel Injectors (Bosch) and got the base map from Eugene Turkov on the car. Finally
have the car driving without CEL, DTCs, stuttering, etc, etc. Now im just collecting enough data to get the base map refined and move towards dialing in the car and making some power again.

some noteworthy things:

1. Eugene required a totally different PCV setup than what was included with the GTM kit. Basically switched over to a PCV delete. previously, i had the valve cover breathers going to the low-pressure side of the supercharger intake, and the PCV valves going to the intake. he explained to me, which makes sense, that under suction there would be unmetered air coming into the manifold from the valve cover breathers, bypassing the MAF. a PCV delete got around this and should hopefully allow for a better tune.

2. after installing a base map, reset your ECU through the Ecutek proecu app. battery disconnect reset did NOT clear previously logged fuel trims which led to some odd short term and long term fuel trims. the Ecutek proecu reset fixed this issue.


Sent from my iPhone using Tapatalk

__________________
2009 Sport Touring | Platinum Graphite | GTM Stage 1 Supercharger | BC BR Coilovers | Hotchkis Swaybar | Z1 FUCAs | AME TM-02 Wheels | Z1 2-piece Front Rotors | Z1 Clutch & Flywheel | Invidia Gemini Catback | GTM Resonated Test Pipes