Rough idle with forced induction

jwick · 08-23-2014, 12:19 PM

Quote:

Originally Posted by Mitco39

I miss so much not being on Facebook sometimes, how does one get in on their coolant tanks? I am uploading a reving video right now although the sound quality sucks as the camera has a hard time picking it up, I should have used my go pro come to think of it.

I'm not on Facebook either but JTran os my tuner. Just call and talk to Amber and tell her you are interested in it. I can add you to the discussion Friday as well

Mitco39 · 08-23-2014, 12:26 PM

Quote:

Originally Posted by jwick

I'm not on Facebook either but JTran os my tuner. Just call and talk to Amber and tell her you are interested in it. I can add you to the discussion Friday as well

I would appreciate it man, If I can get rid of that stock tank and that power steering reservior I would be happy. If I ambitious I might T off those lines and run them down the car and relocate one of those filters that we are currently using. I dont run catch cans on our diesels, but then again they are dirty and no one cares about a little blowby, most just route the line down along the frame and zip tie it off.

jwick · 08-23-2014, 12:41 PM

Quote:

Originally Posted by Mitco39

I would appreciate it man, If I can get rid of that stock tank and that power steering reservior I would be happy. If I ambitious I might T off those lines and run them down the car and relocate one of those filters that we are currently using. I dont run catch cans on our diesels, but then again they are dirty and no one cares about a little blowby, most just route the line down along the frame and zip tie it off.

No problem. It occurred to me that we could save a little money by reusing the filters Sasha provided.

jwick · 09-06-2014, 08:03 AM

Bringing this back, Mitch any updates? You get a catch can setup?

Mitco39 · 09-06-2014, 09:39 AM

Nope not on that front, I just installed my 3" boost tubes tho and am going to be out tuning that today.

To be honest with you I am not sure if I will ever bother with the catch cans, my hunt is very small now after changing up the other things. Catch cans arent cheap. Maybe over the winter I will look at doing it.

jwick · 09-06-2014, 09:51 AM

Quote:

Originally Posted by Mitco39

Nope not on that front, I just installed my 3" boost tubes tho and am going to be out tuning that today.

To be honest with you I am not sure if I will ever bother with the catch cans, my hunt is very small now after changing up the other things. Catch cans arent cheap. Maybe over the winter I will look at doing it.

So in recap. Delete the post cat O2s and changed of the old start table? That's all you changed right?

Mitco39 · 09-06-2014, 10:03 AM

Yes delete the post O2s and change the cold fueling table to the main fueling table because I think it switches between the two more than Uprev would like you to think.

batboyvaj · 09-09-2014, 07:34 AM

Not sure if this is the answer or if you have already thought of this. This could be because the BOV you are using vents to atmosphere rather than recirculating. The 370 uses a maf so it could be messing up your readings causing you to run rich. Back when I had my turbo honda, I never had this issue cause we used a MAP sensor rather than a MAF. Here is a link for reference.

Can someone explain, Recirculating BOV to me please? | DSMtuners

Mitco39 · 09-09-2014, 08:45 AM

The BOVs on our kits are pre mAF, so they are not releasing metered air.

jwick · 09-09-2014, 08:53 AM

Quote:

Originally Posted by Mitco39

I would appreciate it man, If I can get rid of that stock tank and that power steering reservior I would be happy. If I ambitious I might T off those lines and run them down the car and relocate one of those filters that we are currently using. I dont run catch cans on our diesels, but then again they are dirty and no one cares about a little blowby, most just route the line down along the frame and zip tie it off.

Thread Jack...

I stopped in on the JTran dynoday Saturday and Amber informed me that they should be getting the materials in for the overflow tank this week and start welding them up. She seemed pretty confident they could add a site glass too. I didn't get any pricing since they were busy with the dynoday. Heading up there this Friday to get the post cat O2 sensors deleted from my map. I'll inquire more and revert back.

Mitco39 · 09-09-2014, 09:02 AM

Also have them try copying the main fueling table into the cold fueling table and see how you make out with that. Also if they have time have them play with the timming right around idle... IIRC mine is at or right around 66, not sure what uprev calls 66, but thats what it is in the table, lol.

jwick · 09-10-2014, 07:05 AM

Quote:

Originally Posted by Mitco39

Also have them try copying the main fueling table into the cold fueling table and see how you make out with that. Also if they have time have them play with the timming right around idle... IIRC mine is at or right around 66, not sure what uprev calls 66, but thats what it is in the table, lol.

Hit me with the stupid stick if we covered this already but are any of the fixes we are kicking about do anything for the stumbling hiccup as you come off closed loop cruise to standstill idle? Or all just centered around the searching idle?

Mitco39 · 09-10-2014, 09:00 AM

Mine doesnt really hiccup all that much anymore. I would suggest pulling the car into closed loop sooner and see if that gives the car time to settle down before you notice it. I actually have mine to pretty much wait till boost to switch over to open loop, its a bit more aggressive than I had before, seems to work fine tho

Z4fun · 01-19-2019, 10:10 AM

I have idle surge between 13.5 and 15.5. this only happened after mechanic installed A2A kit I got second hand in Tampa, I doubled checked everything and it was in good condition. He said its normal to have idle surge since it has a bov but doesn't make sense since its before the maf lol

car 370z - has stillen sc , test pipes & catback exhaust, 9psi upgrade pulley, a2a kit , tial bov.

I placed the csv log in a zip file on here , I have a vid but its pretty much the same as the other one on the thread its just hunting and idle bounces as well. I sprayed the maf's just to make sure they were clean, as well as carb cleaner around the engine to check for leaks but no joy.. can it be the o2 sensors are black after the tune since it was kicking out black soot in the beginning ?... any ideas ?

jwick · 01-19-2019, 10:57 AM

Quote:

Originally Posted by Z4fun

I have idle surge between 13.5 and 15.5. this only happened after mechanic installed A2A kit I got second hand in Tampa, I doubled checked everything and it was in good condition. He said its normal to have idle surge since it has a bov but doesn't make sense since its before the maf lol

car 370z - has stillen sc , test pipes & catback exhaust, 9psi upgrade pulley, a2a kit , tial bov.

I placed the csv log in a zip file on here , I have a vid but its pretty much the same as the other one on the thread its just hunting and idle bounces as well. I sprayed the maf's just to make sure they were clean, as well as carb cleaner around the engine to check for leaks but no joy.. can it be the o2 sensors are black after the tune since it was kicking out black soot in the beginning ?... any ideas ?

You might want to start a new thread titled for your specific issue. Everyone discussing their issues, me included, on the thread has the BP turbo kit.

09-06-2014, 08:03 AM	#109 (permalink)
jwick A True Z Fanatic Join Date: Dec 2010 Location: Houston Posts: 14,532 Drives: '10 G37 6MT Rep Power: 2465057	Bringing this back, Mitch any updates? You get a catch can setup? __________________ '10 G37T 6MT Graphite/Graphite - BP - G37T Build

09-06-2014, 09:39 AM	#110 (permalink)
Mitco39 A True Z Fanatic Join Date: Aug 2012 Location: Edmonton Alberta Canada Posts: 2,089 Drives: 40th 370z Rep Power: 132	Nope not on that front, I just installed my 3" boost tubes tho and am going to be out tuning that today. To be honest with you I am not sure if I will ever bother with the catch cans, my hunt is very small now after changing up the other things. Catch cans arent cheap. Maybe over the winter I will look at doing it. GaleForce likes this. __________________ 2007 Chevy Duramax - EFILive Tuned By Me 2010 40th W/ Nav - Boosted Performance - UpRev Tuned By Me The Mrs. Ride -2012 335XI N55 BMW - Cobb Tuned By Me, Built by her My Build --> http://www.the370z.com/members-370z-...39s-build.html

09-06-2014, 10:03 AM	#112 (permalink)
Mitco39 A True Z Fanatic Join Date: Aug 2012 Location: Edmonton Alberta Canada Posts: 2,089 Drives: 40th 370z Rep Power: 132	Yes delete the post O2s and change the cold fueling table to the main fueling table because I think it switches between the two more than Uprev would like you to think. GaleForce likes this. __________________ 2007 Chevy Duramax - EFILive Tuned By Me 2010 40th W/ Nav - Boosted Performance - UpRev Tuned By Me The Mrs. Ride -2012 335XI N55 BMW - Cobb Tuned By Me, Built by her My Build --> http://www.the370z.com/members-370z-...39s-build.html

09-09-2014, 08:45 AM	#114 (permalink)
Mitco39 A True Z Fanatic Join Date: Aug 2012 Location: Edmonton Alberta Canada Posts: 2,089 Drives: 40th 370z Rep Power: 132	The BOVs on our kits are pre mAF, so they are not releasing metered air. jwick likes this. __________________ 2007 Chevy Duramax - EFILive Tuned By Me 2010 40th W/ Nav - Boosted Performance - UpRev Tuned By Me The Mrs. Ride -2012 335XI N55 BMW - Cobb Tuned By Me, Built by her My Build --> http://www.the370z.com/members-370z-...39s-build.html

09-09-2014, 09:02 AM	#116 (permalink)
Mitco39 A True Z Fanatic Join Date: Aug 2012 Location: Edmonton Alberta Canada Posts: 2,089 Drives: 40th 370z Rep Power: 132	Also have them try copying the main fueling table into the cold fueling table and see how you make out with that. Also if they have time have them play with the timming right around idle... IIRC mine is at or right around 66, not sure what uprev calls 66, but thats what it is in the table, lol. __________________ 2007 Chevy Duramax - EFILive Tuned By Me 2010 40th W/ Nav - Boosted Performance - UpRev Tuned By Me The Mrs. Ride -2012 335XI N55 BMW - Cobb Tuned By Me, Built by her My Build --> http://www.the370z.com/members-370z-...39s-build.html

09-09-2014, 07:34 AM	#113 (permalink)
batboyvaj Base Member Join Date: Jun 2011 Location: mn Posts: 111 Drives: 2011 370z Rep Power: 14	Not sure if this is the answer or if you have already thought of this. This could be because the BOV you are using vents to atmosphere rather than recirculating. The 370 uses a maf so it could be messing up your readings causing you to run rich. Back when I had my turbo honda, I never had this issue cause we used a MAP sensor rather than a MAF. Here is a link for reference. Can someone explain, Recirculating BOV to me please? \| DSMtuners

09-10-2014, 09:00 AM	#118 (permalink)
Mitco39 A True Z Fanatic Join Date: Aug 2012 Location: Edmonton Alberta Canada Posts: 2,089 Drives: 40th 370z Rep Power: 132	Mine doesnt really hiccup all that much anymore. I would suggest pulling the car into closed loop sooner and see if that gives the car time to settle down before you notice it. I actually have mine to pretty much wait till boost to switch over to open loop, its a bit more aggressive than I had before, seems to work fine tho GaleForce likes this. __________________ 2007 Chevy Duramax - EFILive Tuned By Me 2010 40th W/ Nav - Boosted Performance - UpRev Tuned By Me The Mrs. Ride -2012 335XI N55 BMW - Cobb Tuned By Me, Built by her My Build --> http://www.the370z.com/members-370z-...39s-build.html

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