Rough Start - Something Seems Wrong

Jordo! · 06-08-2015, 03:48 PM

Quote:

Originally Posted by RBfastback

no not a lift, just floor jack on one side of the car in the proper jack location to take a 1 min look.
last week I got the service soon light and had a code for maf sensor. nissan wanted to void my warrantee cuz of my gen 3's but after some arguing they replaced both. still have been having the random limp mode problem but other then that it was running perfect all the way home.
I have art pipes also so no cats

When you say code for MAF, do you mean out of range or high fuel trims? You might just need a tune.

Quote:

Originally Posted by DIGItonium

I did the following: throttle closed, accelerator pedal, and idle volume learn (twice). The next morning I redid the zip ties and switched out a hose that wasn't fitting the barb properly. It idled and warmed up nicely, which it didn't do that the day before. After a test drive idle bounces ever so slightly at times. This is something I dealt with before doing the major work, but I will continue to monitor and trace any leaks. At least it's not throwing P0507.

So far so good... engine is running smooth, and so far no warm start issues.

If it dials itself out, it could be lingering fuel trim that will eventually self correct (although I think you can clear those out with cipher). If intermittent, I'd try cleaning MAF sensors with that CRC spray.

If still no change, then there may be a small deformation or pinhole somewhere causing an occasional vac leak.

I actually had that problem on the OEM intakes! I over-tightened a hose clamp and managed to ever so lightly deform the plastic of the intake tube

If you still have any of those little L shaped resonator boxes in the intake to IM tract, I'd check those too.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Rough shifting 7AT	rico magic	Engine & Drivetrain	10	07-08-2011 02:30 AM
Automatic 2-1 rough downshifting	cg370z	Nissan 370Z General Discussions	50	05-16-2011 02:59 PM
Long rough weekend	NYBladeZ	The Lounge (Off Topic)	30	03-20-2010 07:25 PM
What's wrong with the 6MT?	WooZ	Nissan 370Z General Discussions	40	08-29-2009 07:01 PM