Oh yeah, Sorry I forgot to post.

I replaced both the upper and lower plenum gaskets and the throttle body gasket. Problem not solved. I'm consistantly getting a code for Cyl 6 misfire, so I assume it's a leaky injector seal or a bad injector. It only happens at 650 rpm (idle) and it's almost not noticeble. Regarless it pisses me off, and I'm going to rip back into it soon, hopefully this week. At least my ecu is seeing it now, and I know it's cyl 6 that's having the problem. I also tried bypassing the emanage injector harness and it still was missfireing. I'll let you know once I get it ironed out.

 

ETX, you may be our savior.

Update to my story: I replaced the UR pulley with my stock crank pulley and like I said before, it idles a little smoother, but I DO get the SES on occasion. It illuminates for about twenty miles, then disappears. I'm half tempted to buy the TS reflash to eliminate the emanage . . . after I get my forged internals Although I won't be able to tune it, do I really want to let anyone in KY touch this thing *LOL* . . .

 

the other thing i changed recently is my flywheel and clutch. I actually dont recall having the misfire since getting the clutch and flywheel. (JWT)

 

slightly off topic, i have been considering the emanage, ts flash, or s-afc. Any advice or recommendations. Still NA but going FI at some point after i get to compare JWT kit to APS.

 

JonathanG35, are you running stock plugs?

 

This issue is not something we can eliminate by doing the reflash. It may be part of the fundamentals of the engine or a design flaw. This issue also happened on a bone stock Z before we worked on it and happens on my own modified Z all the time.

 

Interesting . . . I just assumed it was due to the "richness" of the Greddy stock maps. In either case, my gas mileage sucks, so something has to give

G

 

With our Greddy TT reflash, we have different maps between partial and WOT so your MPG doesn't suffer as badly.

 

yeah, stock plugs. I probably need new ones too.

 

btw, my engine does still have the problem but it is much less in the past 2 months.

 

i have the same problem...when it deps between 650 or lower thoughs the cel...or if i shift to low it gos on..i just get it cleared and move on...i did however notice that when i start the z i give a little gas other 700 and it dsnt come on.think the dealer can raise the rev up for us?

 

the thing i dont like about raising the revs, it that it does not seem to truly address the root cause of the problem. If i touch th gas alittle to get the revs up, it will usually still exhibit the symptoms up as high as 1200 rpm.

you just cant feel it as much.