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Hesitation/Bog/Sputter @ 3k RPM

Old 10-17-2011, 08:01 PM
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OMG35S
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Question Hesitation/Bog/Sputter @ 3k RPM

I did a mountain run with a few of my friends the other day and noticed some bog/sputter/hesitation at around 2k-3k RPM.

Happens in almost every gear, when you heavy accelerate at low RPM. Once you pass 3k RPM there is no sputter/bog/sputter. It feels good till around 2.5k RPM and then it hiccups/sputters/bogs/hesitates for a split-second and once it passes 3k RPM it picks up again.

Yes, I do have RTP's installed as well as a full exhaust and I've done my research. It seems like there are others with similar issues who have aftermarket cats/pipes. Some say a tune fixes it and others have gotten the tune and still have the issue!?

I have Stillen V3 CAI's in my basement and I'm thinking about installing them and maybe it won't hesitate/sputter/bog anymore. Honestly, it's not bad if you are daily driving but on the mountain it was more obvious. Car felt great by the way!

Anyone have a concrete reason why this happens? I'm assuming it's going from lean to rich real quick and the ECU hiccups? Will the intake even it out? I'm not planning on getting a tune till next year...

Thanks!

BTW.. I have a HR 07' Infiniti G35s 6mt..
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Old 10-17-2011, 08:34 PM
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Hmmmm....is this bogging/sputtering whatever actually happening with the car or are you just watching the tach?
I know at low RPM's when I mash my throttle in any gear the tach likes to bounce up and down a little before she takes off......not to mention Z is lacking with low end power anyways :/
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Old 10-18-2011, 09:00 AM
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Originally Posted by CTZ860 View Post
Hmmmm....is this bogging/sputtering whatever actually happening with the car or are you just watching the tach?
I know at low RPM's when I mash my throttle in any gear the tach likes to bounce up and down a little before she takes off......not to mention Z is lacking with low end power anyways :/
The Z does not lack in low-end power.
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Old 10-26-2011, 01:01 PM
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I just got the same type of problem. With low revs around 2-3k it doesn't pull evenly if you apply medium amount of gas. It gets a bit jerky. I don't have test pipes so that's not the problem. I have had the same engine mods (plenum spacer and catback) for couple of years and no problems until now.
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Old 02-05-2012, 12:06 PM
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A bit old of a thread but any resolution? My G35 has the same thing going on.
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Old 02-05-2012, 02:46 PM
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I think the problem was more being in the wrong gear on a mountain below 3k, plus at part throttle the ecm would still be adjusting fuel ratio for proper catalyst function.
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Old 02-05-2012, 03:45 PM
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Originally Posted by Blu_Blur View Post
The Z does not lack in low-end power.
Yes it does....
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Old 03-11-2012, 06:54 PM
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Recent TSB that Updated my ECU fixed the issue.
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Old 04-25-2012, 05:39 PM
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Bowza
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Do you have a link to the TSB? I recently started having this problem as well.
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Old 04-25-2012, 07:54 PM
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Originally Posted by Bowza View Post
Do you have a link to the TSB? I recently started having this problem as well.
+1. Interested.
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Old 05-23-2012, 08:43 PM
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any update on this?
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Old 01-16-2019, 04:20 PM
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Bump anyone resolve this? I put my stock cats back on and ran it hard. No jerk no sputter.
decided to try z1 100 cpsi hfc instead of straight test pipes and while the problem isnt as bad it still bogs and jerks at low rpm full throttle like 2500-3500 rpm.
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