long term and short term - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

brichard0625 · 08-25-2013, 06:51 PM

Just had a quick question. When it comes to long term and short term fuel ratios, where should they ideally be at? can an intake affect the numbers?

Ross · 08-25-2013, 06:57 PM

For long terms I shoot for 0, for short term I personally like to see no more the +3 to -3 tighter is preferred if possible as that is a 6% swing

brichard0625 · 08-25-2013, 07:21 PM

Quote:

Originally Posted by Ross

For long terms I shoot for 0, for short term I personally like to see no more the +3 to -3 tighter is preferred if possible as that is a 6% swing

thank you...i wanna check my logs now that im on a stock tune because on ecutek tune my short term was like 8-16% my long term was like 0-2%

arghx7 · 08-25-2013, 08:14 PM

stock car, stock tune? Pretty whatever's it's at is fine unless you're throwing a code or something. It's a self-learning system and every engine is in a different condition.

brichard0625 · 08-25-2013, 08:31 PM

Quote:

Originally Posted by arghx7

stock car, stock tune? Pretty whatever's it's at is fine unless you're throwing a code or something. It's a self-learning system and every engine is in a different condition.

stock car and i am throwing a code. p0420..waiting for toyota to see if they can change the header for me.

ft_sjo · 08-26-2013, 01:02 AM

P0420 can also get directly triggered by a lean running condition, not just catalyzer efficiency.

brichard0625 · 08-26-2013, 08:45 AM

I've checked everything and put everything back to stock. My last guess is cat in header. Just trying to figure it out if it could be my drop in filter. Im sure it cant be that but who knows..the code comes and goes...it stays on for a week and shuts off for a week and then comes back by itself again.

xjohnx · 08-26-2013, 08:56 AM

Quote:

Originally Posted by brichard0625

I've checked everything and put everything back to stock. My last guess is cat in header. Just trying to figure it out if it could be my drop in filter. Im sure it cant be that but who knows..the code comes and goes...it stays on for a week and shuts off for a week and then comes back by itself again.

Have you checked DI seals? having one of those go bad could result in a lean condition like @ft_sjo suggested. Granted, I would think you'd see a misfire or coil pack code too, but it's worth a look.

08-25-2013, 06:51 PM	#1
brichard0625 Senior Member Join Date: Jun 2012 Drives: 2013 Scion Frs(Scarlet) Location: Bronx, NY Posts: 907 Thanks: 172 Thanked 386 Times in 177 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	long term and short term Just had a quick question. When it comes to long term and short term fuel ratios, where should they ideally be at? can an intake affect the numbers? __________________

08-26-2013, 08:45 AM	#7
brichard0625 Senior Member Join Date: Jun 2012 Drives: 2013 Scion Frs(Scarlet) Location: Bronx, NY Posts: 907 Thanks: 172 Thanked 386 Times in 177 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	I've checked everything and put everything back to stock. My last guess is cat in header. Just trying to figure it out if it could be my drop in filter. Im sure it cant be that but who knows..the code comes and goes...it stays on for a week and shuts off for a week and then comes back by itself again. __________________

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08-25-2013, 06:57 PM	#2
Ross Senior Member Join Date: Jun 2013 Drives: 85 corolla gts Location: Chesapeake , Va Posts: 361 Thanks: 17 Thanked 177 Times in 110 Posts Mentioned: 26 Post(s) Tagged: 0 Thread(s)	For long terms I shoot for 0, for short term I personally like to see no more the +3 to -3 tighter is preferred if possible as that is a 6% swing

08-25-2013, 08:14 PM	#4
arghx7 Senior Member Join Date: Nov 2011 Drives: car Location: cold Posts: 599 Thanks: 72 Thanked 607 Times in 185 Posts Mentioned: 33 Post(s) Tagged: 0 Thread(s)	stock car, stock tune? Pretty whatever's it's at is fine unless you're throwing a code or something. It's a self-learning system and every engine is in a different condition.

08-26-2013, 01:02 AM	#6
ft_sjo Banned Join Date: Oct 2012 Drives: GT86 Location: The Motherland Posts: 1,398 Thanks: 140 Thanked 473 Times in 271 Posts Mentioned: 22 Post(s) Tagged: 0 Thread(s)	P0420 can also get directly triggered by a lean running condition, not just catalyzer efficiency.

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