krivera6950

iTrader: (3)

My car is currently at the shop and the clutch was just installed but when the car is started it has a rough idle and won't accelerate at all. My car has a powerlabs single turbo and is street tuned with Osiris software. Has anyone else had this problem.

GreenGoblin

iTrader: (6)

Just curious did you add a lighter flywheel? The difference in the rotating mass could be enough to make the car bog out at idle. As for as not accelerating?

What clutch and flywheel is it?

travis0260

iTrader: (4)

It's probably an issue with the flywheel alignment. There is a sensor that points at the outside edge of the flywheel. on the outside edge of the flywheel you will see small notches. These notches are used to report crank angle position to the ECU. The ECU uses this info to adjust the cam advance when you accelerate.

The notches on your flywheel are not aligned so the crank angle is not being picket up correctly. this is keeping your cams from advancing when accelerating.

If the mechanic run a diagnostic on your car it will probably ***** about the cam position. The root of the issue is really the flywheel alignment.


How to fix:
take a look at the pic
you see that tiny hole? that needs to be aligned with the dowel on the crank. right now that hole is not over the dowel.

Your probably wondering how the mechanic got the flywheel installed without matching the dowel to the hole. the after marked flywheels have small groves that will allow the flywheel to install flush against the crank without the dowel lining up with the small hole in the flywheel.

travis0260

iTrader: (4)

I marked the hole that needs to be aligned with the dowel

thawk408

iTrader: (16)

Is it throwing a CEL? Sounds like crank position sensor, and it uses the teeth on the flywheel to detect the crank position. It has happend to me before you have to shim the mounting tap on the sensor to get it either closer or farther from the flywheel. It has to be aligned just perfect.

EDIT:

This also relates to the above posters response.

krivera6950

iTrader: (3)

Running an act prolight flywheel. I went to the shop and the mechanic called a Nissan tech and he stated the exact same thing that possibly the sensor was not aligned properly. He is removing the tranny and gonna realign everything to make sure but he's 100% sure that the sensor wasn't aligned. I can't really say for CEL because it was throwing it before. I appreciate all the info and help

thawk408

iTrader: (16)

It is the sensor. Exact same thing happend to me on my ACT flywheel, but I could barely drive mine and it just backfired and ran like ***. My sensor was to far away from the flywheel.

Shim a very very small portion off the tab on the sensor. Put some chalk, or similar product, on the tip of the sensor and place it back on the transmission. Slowely turn the crank pulley, with a wrench, and see if the flywheel is hitting the sensor at all. Fire the car up if the sensor is not being hit and see how it runs.

str8dum1

iTrader: (11)

^did you ever get a code when you had that CPS distance problem?

krivera6950

iTrader: (3)

No I unfortunately didn't check for codes I was panicking alil bit lol before I got my head straight

krivera6950

iTrader: (3)

Ok got the car running but after a while the car started throwing CEL and gets fuel cut. I know the car is running extremely rich and has a big smell of gas. I also had the spark plugs installed at the same time, 1 step colder. The mechanic ran obdi and got a random misfire code. Could it be the my car needs to be retuned. My car was street tuned not dyno tuned so it was running really rich to start. Any ideas

binder

iTrader: (8)

if you went up in injector size without changing the tune then yes, it would run rich and could cause a misfire.

thawk408

iTrader: (16)

Yes. Crank position code I believe.

GreenGoblin

iTrader: (6)

Who is tuning your car?

Jtran Studios

iTrader: (3)

needs a tune

ddc665350ztt

new injectors? and they're one step colder? or did you mean spark plugs? If you meant you got new injectors AND new spark plugs, what size are your new injectors?

krivera6950

iTrader: (3)

sorry i meant spark plugs, i'm getting the car tuned at billet design by marco with uprev. he plugged up his cipher and it showed cylinder #4 misfiring and then random misfire code. the cars at the shop being looked over

dmelo818

The auto shop called me today after they installed my new JWT clutch and flywheel.

But...They said my motor was blown. I don't know how they figured that if it was fine when I took it in.

I dont have a 350z or 370 but a 2004 G35 coupe.

Today, when I went to the shop and turned it on...The car idled like ****, it would bog out and hardly has any throttle response. Also, the tech has cam position issue reading from the ecu as stated above. Thank you so much! I will be taking this and a few other posts from this 350z forums and giving them something to read.

Should I tell them at no cost to reinstall it correctly? I mean, I dont want to be a dick but in reality, they did no install it the right way first time around