I notice that when I crank my car up and let it warm up my airfuel is around 15-17. Then after driving the AFR chills around 12.00 or so. If I cut my lights on it drops down to like 15-14. Is it a vacuum problem posibly,bad grounds(I have more than enough)??? In running 10psi on a stock obd0 b16 street tuned with BRE.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by D-meet07 &raquo;</TD></TR><TR><TD CLASS="quote">I notice that when I crank my car up and let it warm up my airfuel is around 15-17. Then after driving the AFR chills around 12.00 or so. If I cut my lights on it drops down to like 15-14. Is it a vacuum problem posibly,bad grounds(I have more than enough)??? In running 10psi on a stock obd0 b16 street tuned with BRE. </TD></TR></TABLE>

IF you had 12.0 @ idle The car would stall from too much fuel. it sounds like a grounding issue.

 

what are you logging afr with? are you running open loop all the time?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Boostage &raquo;</TD></TR><TR><TD CLASS="quote">

IF you had 12.0 @ idle The car would stall from too much fuel. it sounds like a grounding issue.</TD></TR></TABLE>

not true, my car idles 11-12 afrs like it was stock, h22 87mm bore 1000cc injectors never died on me in traffic

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Boostage &raquo;</TD></TR><TR><TD CLASS="quote">

IF you had 12.0 @ idle The car would stall from too much fuel. it sounds like a grounding issue.</TD></TR></TABLE>

How do you figure.

We need a few more details on the setup. What injectors are you using? It either sounds like a battery voltage scalar problem with the injectors, ELD problem or ECT/IAT correction. This is a pretty common thing with bigger injectors.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mykizism &raquo;</TD></TR><TR><TD CLASS="quote">

not true, my car idles 11-12 afrs like it was stock, h22 87mm bore 1000cc injectors never died on me in traffic

</TD></TR></TABLE>

I guess every setup is different. My car had issues. even at 14.0. but then again my build was not typical. :shrugs:

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Boostage &raquo;</TD></TR><TR><TD CLASS="quote">

I guess every setup is different. My car had issues. even at 14.0. but then again my build was not typical. :shrugs:</TD></TR></TABLE>

I dunno man. I have seen more idle problems from lean conditions and small plug gaps than a richer setup. Usually a little rich on the idle will smooth it out a bit.

Just curious, what was your setup and what not.

 

what injectors r u running? if u have 750 and up, u will need battery voltage correction. u might need to upgrade to OBD1 and run crome

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Boostage &raquo;</TD></TR><TR><TD CLASS="quote">

IF you had 12.0 @ idle The car would stall from too much fuel. it sounds like a grounding issue.</TD></TR></TABLE>

No my stockish B16 right now idles at like 11.5-12.5:1 when cold, it idles like hell but it does work!

 

havnet been on in like 2 days. Im runing DSM 450 blue caps. Im still obd0. I kinda figured that it might be due to the stock pistons. Maybe after running boost on them for lets say 15+ mintues the pistons are still hot enough to make the wideband read rich. Im running a AEM wideband. My car has been shocking me lately but I have like 4 grounds. Tranny,valve cover, block and the battery is in the trunk which is grounded the the frame.

im clueless.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Boostage &raquo;</TD></TR><TR><TD CLASS="quote">

IF you had 12.0 @ idle The car would stall from too much fuel. it sounds like a grounding issue.</TD></TR></TABLE>

actually, during cold start up I idle @ 12.5-12.3 and the car runs fine. although it does sound like a voltage problem

 

Um, turn the car on. Monitor AFR and coolant temp. Get up. Drink a beer. Come back outside. Note AFR and coolant temp. Do this until your car warms to operating temperature. If the AFR is significantly leaner when the engine is cold, you need to fiddle with your ECT tables. If the AFR looks fine, then its your IAT sensor getting heat soaked after a run and over correcting your fuel at idle. Also any dumbass that thinks a car can't idle at 12s AFR is a dumbass. 12s AFR is when fuel burns fastest. Theoretically if gas was pennies, ICEs didn't pollute, and you didn't mind stopping at the pump all the time, you would tune for 12s AFR irregardless of load as thats where the most power will be found.

 

^^^most power at idle, make full boost at idle on thosse small turbo's hhahah, totally kidding. this is very good advice what you said, so im not gonna post anything different.

and it would idle at 12:1, my car dips low sometimes and it still idles and doesnt stall...

 

I beleive it is a voltage problem. I noticed with the headlights and heat on the a/f was sitting right where I wanted her too. Then when I cut the heat off she junped to 13 or so. Turned off the lights and 12??? What would solve this problem??? A high performance alternator if they even make one??? dry cell battery???

 

There is an a correction table for battery voltage. There are a whole bunch of correction tables within a ROM. What BRE gives you access to is a different story.

 

Probably nothing??? daymit

 

is it in closed loop?

 

bump cause i'm interested to know too....
\

 

yes its closed loop.