Post Stillen Supercharger Issue (Jerky Driving)

bcfromfl · 01-07-2018, 02:26 PM

I hope we get a solid resolution on this problem! Please report back what you find!

In an effort to think outside the box, I'm wondering if those without catch cans might be more susceptible to this issue in a FI engine? Fouling of the throttle sensors?

overtureZ · 01-07-2018, 06:24 PM

It feels like something either tricking the TPSs or they are getting an incorrect or fluctuated current. But I could be way wrong :/

overtureZ · 01-09-2018, 08:02 AM

Do you have the new Stillen extension cables?

Quote:

Originally Posted by bikeking

I have that same jerky driving under light load, I either end up gearing down and lugging it a bit or gearing up and running it a bit higher than I would when I'm cruising , I can power through it when it does it, my tuner noticed it in his drive home and tried to adjust, but it still does it. Only after the a2a we had this problem. Are you uprev? I've sense bought a ecutek cable from seb thinking that will be my solution but winter came before I could datalog.

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BOLIO 671 · 01-09-2018, 08:29 AM

I also had this problem recently...it happened to be my pins on MAF1 going to Bank 1, right at the end of the pig tail. Apparently when using the Stillen Extension Cables on the original Stillen set up (A2W) it had widen the gap on the original MAF harness pins under the pigtail. Due to the new piping I only used the Stillen extensin cable on one of the MAF sensors (Bank 2). After straightening out the pins I was back in business. The loose/misaligned pins on the MAF pins was tripping out the MAF readings thus throwing the AFR'S and Idle.all over the place.

TopgunZ · 01-09-2018, 08:44 AM

I have spare sets of Brand New Gen2 Stillen MAF cables. Just FYI.

overtureZ · 01-09-2018, 08:50 AM

Quote:

Originally Posted by BOLIO 671

I also had this problem recently...it happened to be my pins on MAF1 going to Bank 1, right at the end of the pig tail. Apparently when using the Stillen Extension Cables on the original Stillen set up (A2W) it had widen the gap on the original MAF harness pins under the pigtail. Due to the new piping I only used the Stillen extensin cable on one of the MAF sensors (Bank 2). After straightening out the pins I was back in business. The loose/misaligned pins on the MAF pins was tripping out the MAF readings thus throwing the AFR'S and Idle.all over the place.

After A2A you only using 1 extension? I am still using 2?? One to the upper MAF and one to that Throttle body.

overtureZ · 01-09-2018, 12:23 PM

Also guys, another reason I am thinking may be a vacuum leak. Anyone know a good way to do a vac test with the A2A setup?

MinionZ · 01-09-2018, 02:04 PM

smoke test should work or while idling spray carb clean/ brake clean around

overtureZ · 01-09-2018, 02:25 PM

I plan on spraying my TBs and Manifold just to make sure, but Im still trying to figure out a way to smoke test the system. I would have to plug the BPV and the SC inlet no?

TopgunZ · 01-09-2018, 02:51 PM

Id test the Maf sensors too. The gasket can easily get crimped and cause a leak. Ive seen it a few times already, including my own build once.

TopgunZ · 01-09-2018, 02:52 PM

You dont have to use smoke. Just use pressurized air. I can send a pic of the adapter to build for like $5. Then just clamp it in where the L pipe clamps into the Tial pipe and pressurize it to about 5 psi. You need to make sure your at TDC (top dead center).

overtureZ · 01-09-2018, 03:16 PM

Quote:

Originally Posted by TopgunZ

You dont have to use smoke. Just use pressurized air. I can send a pic of the adapter to build for like $5. Then just clamp it in where the L pipe clamps into the Tial pipe and pressurize it to about 5 psi. You need to make sure your at TDC (top dead center).

Yes please send me some info on this!

And referring to the MAF gasket...... I am actually missing a MAF gasket completely on one of my MAFs...

TopgunZ · 01-09-2018, 04:12 PM

Quote:

Originally Posted by overtureZ

Yes please send me some info on this!

And referring to the MAF gasket...... I am actually missing a MAF gasket completely on one of my MAFs...

Lol...Wellllll.....

overtureZ · 01-09-2018, 05:04 PM

Quote:

Originally Posted by TopgunZ

Lol...Wellllll.....

I don't know why I didn't catch this when installing the MAFs I don't think this will cure my issue though

overtureZ · 01-10-2018, 10:21 AM

Update: Had a spare MAF sensor so I just got the gasket from that one, no change in drivability. Still super jerky under light throttle load.

My new stillen cables will be delivered this afternoon, hoping for good results! If not I am going to get the CJM fuel return system and see if swapping out the pump along with it cures the issue.

01-07-2018, 06:24 PM	#17 (permalink)
overtureZ Enthusiast Member Join Date: Dec 2015 Location: Middle TN Age: 30 Posts: 319 Drives: Da Boosted Z Rep Power: 9	It feels like something either tricking the TPSs or they are getting an incorrect or fluctuated current. But I could be way wrong :/ __________________ Auto/Z Enthusiast - Mechanical Engineer - Fabricator - Do it for dale

01-09-2018, 08:29 AM	#19 (permalink)
BOLIO 671 A True Z Fanatic Join Date: Mar 2010 Location: GUAHAN Posts: 1,198 Drives: To & From then Back Rep Power: 3399	I also had this problem recently...it happened to be my pins on MAF1 going to Bank 1, right at the end of the pig tail. Apparently when using the Stillen Extension Cables on the original Stillen set up (A2W) it had widen the gap on the original MAF harness pins under the pigtail. Due to the new piping I only used the Stillen extensin cable on one of the MAF sensors (Bank 2). After straightening out the pins I was back in business. The loose/misaligned pins on the MAF pins was tripping out the MAF readings thus throwing the AFR'S and Idle.all over the place. __________________ 2013 Nismo Z34 / FI TT #091 / IG: @lilzilla_z34

01-09-2018, 08:44 AM	#20 (permalink)
TopgunZ A True Z Fanatic Join Date: Jun 2012 Location: Minneapolis Posts: 2,651 Drives: 06 350Z , 09 370Z MT Rep Power: 6833	I have spare sets of Brand New Gen2 Stillen MAF cables. Just FYI. __________________ ROTREX SUPERCHARGER TUNER KITS - $6799/ CUSTOM STILLEN AIR TO AIR KITS -$2100/ 700+ WHP!! WWW.TOPGUNSPEEDWORKS.COM

01-09-2018, 12:23 PM	#22 (permalink)
overtureZ Enthusiast Member Join Date: Dec 2015 Location: Middle TN Age: 30 Posts: 319 Drives: Da Boosted Z Rep Power: 9	Also guys, another reason I am thinking may be a vacuum leak. Anyone know a good way to do a vac test with the A2A setup? __________________ Auto/Z Enthusiast - Mechanical Engineer - Fabricator - Do it for dale

01-09-2018, 02:04 PM	#23 (permalink)
MinionZ Base Member Join Date: Jan 2016 Location: Kansas Posts: 41 Drives: 09 Nissan 370z m6 Rep Power: 9	smoke test should work or while idling spray carb clean/ brake clean around BOLIO 671 likes this.

01-07-2018, 02:26 PM	#16 (permalink)
bcfromfl Enthusiast Member Join Date: Nov 2016 Location: Youngstown, FL Posts: 256 Drives: 2015 PW Nismo 6MT Rep Power: 8	I hope we get a solid resolution on this problem! Please report back what you find! In an effort to think outside the box, I'm wondering if those without catch cans might be more susceptible to this issue in a FI engine? Fouling of the throttle sensors?

01-09-2018, 02:25 PM	#24 (permalink)
overtureZ Enthusiast Member Join Date: Dec 2015 Location: Middle TN Age: 30 Posts: 319 Drives: Da Boosted Z Rep Power: 9	I plan on spraying my TBs and Manifold just to make sure, but Im still trying to figure out a way to smoke test the system. I would have to plug the BPV and the SC inlet no? __________________ Auto/Z Enthusiast - Mechanical Engineer - Fabricator - Do it for dale

01-09-2018, 02:51 PM	#25 (permalink)
TopgunZ A True Z Fanatic Join Date: Jun 2012 Location: Minneapolis Posts: 2,651 Drives: 06 350Z , 09 370Z MT Rep Power: 6833	Id test the Maf sensors too. The gasket can easily get crimped and cause a leak. Ive seen it a few times already, including my own build once. BOLIO 671 likes this. __________________ ROTREX SUPERCHARGER TUNER KITS - $6799/ CUSTOM STILLEN AIR TO AIR KITS -$2100/ 700+ WHP!! WWW.TOPGUNSPEEDWORKS.COM

01-09-2018, 02:52 PM	#26 (permalink)
TopgunZ A True Z Fanatic Join Date: Jun 2012 Location: Minneapolis Posts: 2,651 Drives: 06 350Z , 09 370Z MT Rep Power: 6833	You dont have to use smoke. Just use pressurized air. I can send a pic of the adapter to build for like $5. Then just clamp it in where the L pipe clamps into the Tial pipe and pressurize it to about 5 psi. You need to make sure your at TDC (top dead center). __________________ ROTREX SUPERCHARGER TUNER KITS - $6799/ CUSTOM STILLEN AIR TO AIR KITS -$2100/ 700+ WHP!! WWW.TOPGUNSPEEDWORKS.COM

01-10-2018, 10:21 AM	#30 (permalink)
overtureZ Enthusiast Member Join Date: Dec 2015 Location: Middle TN Age: 30 Posts: 319 Drives: Da Boosted Z Rep Power: 9	Update: Had a spare MAF sensor so I just got the gasket from that one, no change in drivability. Still super jerky under light throttle load. My new stillen cables will be delivered this afternoon, hoping for good results! If not I am going to get the CJM fuel return system and see if swapping out the pump along with it cures the issue. __________________ Auto/Z Enthusiast - Mechanical Engineer - Fabricator - Do it for dale

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