Custom intakes throwing cel!

B-radZ10 · 05-17-2019, 05:44 PM

So I got custom intakes made from my buddy put them went and picked the car up drove it about 30 miles running great no cel. Then I get home let it ait for 3 hours get back in start it no cel drive about a mile then Cel comes on. Pulled over turned car off let sit for about 3 min restart car cel still on drove it to work about 17 miles with cel on was sputtering a bit around 3000 rpm. Any ideas on what to do? Dont want to get it dyno'd since I'm NA

Spartan 1771 · 05-17-2019, 06:02 PM

Well if you dont want to have the AF ratio adjusted via a tune, I'm not sure what you can do short of going back to stock or purchasing a proven aftermarket intake.

Is this your only mod?

1st · 05-17-2019, 06:24 PM

I am assuming it has something to do with the MAF.

SouthArk370Z · 05-17-2019, 07:19 PM

Read any OBD DTCs and google the code.

B-radZ10 · 05-18-2019, 12:28 AM

Quote:

Originally Posted by Spartan 1771

Well if you dont want to have the AF ratio adjusted via a tune, I'm not sure what you can do short of going back to stock or purchasing a proven aftermarket intake.

Is this your only mod?

Yes this is my first mod had my buddy with a scanner tonight clear the codes it was MAF sensors drove it home and it ran fine no Cell right now. Tomorrow I'm Putting on Fast Intentions HFC with full Tomei which I think might throw cel again. Was jw should I just buy like an uprev tune for both of these instead of taking it to a tune shop?

B-radZ10 · 05-18-2019, 12:49 AM

These are the 3in custom fab intakes my buddy did!!

jchammond · 05-18-2019, 05:59 AM

Quote:

Originally Posted by B-radZ10

These are the 3in custom fab intakes my buddy did!!

Just be sure mass air flow sensors are clean & pointing in proper direction first

NorthStyle · 05-18-2019, 06:58 AM

You need to have your MAFs scaled for 3" intakes. So either tuning, change your intakes to ones that have proper sized piping to not upset the MAFs (Stillen, AEM, etc) or back to stock.

Chuck33079 · 05-18-2019, 08:03 AM

Quote:

Originally Posted by NorthStyle

You need to have your MAFs scaled for 3" intakes. So either tuning, change your intakes to ones that have proper sized piping to not upset the MAFs (Stillen, AEM, etc) or back to stock.

These are your only options.

SouthArk370Z · 05-18-2019, 08:56 AM

For the sake of your engine, please put the OEM intakes back on until you learn a little more about engine mods. Although your buddy's intakes look great, they are not the proper equipment (see comments above).

As far as a tune goes, the rule of thumb is:
Intake mods only - no tune required (the ECM will adapt)
Exhaust mods only - no tune required (the ECM will adapt)
Intake + exhaust mods - tune required

IMNSHO, metal intakes are a bad idea. You pick up a lot of heat from the engine bay unless you do a lot of insulating. YMMV

dts3 · 05-18-2019, 11:17 AM

Yeah, running lean is no joke. Go back to stock (+cbe?) until you convince yourself to get a tune

B-radZ10 · 05-19-2019, 12:07 AM

Well looks like I'm taking It to a dyno next weekend once I get this last ******* Demon bolt off ��!!

05-17-2019, 05:44 PM	#1 (permalink)
B-radZ10 Base Member Join Date: Oct 2018 Location: Pennsylvanian Posts: 10 Drives: 2013 370z sport 6MT Rep Power: 7	Custom intakes throwing cel! So I got custom intakes made from my buddy put them went and picked the car up drove it about 30 miles running great no cel. Then I get home let it ait for 3 hours get back in start it no cel drive about a mile then Cel comes on. Pulled over turned car off let sit for about 3 min restart car cel still on drove it to work about 17 miles with cel on was sputtering a bit around 3000 rpm. Any ideas on what to do? Dont want to get it dyno'd since I'm NA

05-17-2019, 06:02 PM	#2 (permalink)
Spartan 1771 A True Z Fanatic Join Date: Nov 2009 Location: Western Maryland Posts: 1,280 Drives: Wife crazy & 09 370Z Rep Power: 105454	Well if you dont want to have the AF ratio adjusted via a tune, I'm not sure what you can do short of going back to stock or purchasing a proven aftermarket intake. Is this your only mod? __________________ ~Rob -DD Air Guide, Stillen G3 CAIs, 63mm Throttle Bodies, Motordyne M370, Berk HFCs, FI TDX CBE (non-res, CF), Sprint booster v3, Ecutek Dyno Tuned, and the list goes on...

05-17-2019, 06:24 PM	#3 (permalink)
1st A True Z Fanatic Join Date: Jul 2012 Location: I 80 Biz U.S. 50 Posts: 1,708 Drives: Platinum Z Rep Power: 1616	I am assuming it has something to do with the MAF. B-radZ10 likes this.

05-17-2019, 07:19 PM	#4 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	Read any OBD DTCs and google the code. B-radZ10 likes this. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

05-18-2019, 06:58 AM	#8 (permalink)
NorthStyle A True Z Fanatic Join Date: Aug 2015 Location: Deutschland + SC/FL USA Posts: 1,255 Drives: 2011 370Z Nismo Rep Power: 24277	You need to have your MAFs scaled for 3" intakes. So either tuning, change your intakes to ones that have proper sized piping to not upset the MAFs (Stillen, AEM, etc) or back to stock. Rusty and JLarson like this.

05-18-2019, 08:56 AM	#10 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	For the sake of your engine, please put the OEM intakes back on until you learn a little more about engine mods. Although your buddy's intakes look great, they are not the proper equipment (see comments above). As far as a tune goes, the rule of thumb is: Intake mods only - no tune required (the ECM will adapt) Exhaust mods only - no tune required (the ECM will adapt) Intake + exhaust mods - tune required IMNSHO, metal intakes are a bad idea. You pick up a lot of heat from the engine bay unless you do a lot of insulating. YMMV Chuck33079 likes this. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

05-18-2019, 11:17 AM	#11 (permalink)
dts3 Track Member Join Date: May 2018 Location: Farmington Hills, MI Posts: 599 Drives: 08 Expedition Rep Power: 6765	Yeah, running lean is no joke. Go back to stock (+cbe?) until you convince yourself to get a tune

05-19-2019, 12:07 AM	#12 (permalink)
B-radZ10 Base Member Join Date: Oct 2018 Location: Pennsylvanian Posts: 10 Drives: 2013 370z sport 6MT Rep Power: 7	Well looks like I'm taking It to a dyno next weekend once I get this last ******* Demon bolt off ��!!

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