Hmm.... running rich

Post by **ZOMG.SR20** » Mon Sep 07, 2009 12:08 pm

My car is running but not really because of this problem of a rich fuel mixture

http://www.youtube.com/watch?v=nJxVJU4BaTk

and the Idles off but I can deal with that

http://www.youtube.com/watch?v=Tl7FYIBVuIc

new FPR

New fuel filter New Fuel pump New injectorsnew MAF New IACV

so WTF?

it revs fine but as the idle comes down the mixtures stays rich and when it gets to 800 it stalls out and now it wont start back up at all

the car will crank fire die then I crank it and it just cranks and cranks till i un hook the fuel pump and dry out the cylinders the it cranks and fires and dies

Post by **Chris28** » Mon Sep 07, 2009 12:15 pm

Injector o-rings?

Do you have a wideband to confirm that you are running rich?

I thought only the mods had that avatar.

Post by **ZOMG.SR20** » Mon Sep 07, 2009 12:29 pm

those is new also

Post by **ZOMG.SR20** » Mon Sep 07, 2009 12:30 pm

i have a hunch its my O2 sensor since it doesnt matter whether its plugged in or not it still does the same thing

Post by **kouki munster** » Mon Sep 07, 2009 1:12 pm

I was having the exact same problem, no bad sensors, injector o-rings good, proper fuel pressure, ect... It was just dumping crap tons of fuel and flooding out and wouldn't start.

The only cause that I could come up with was that the ecu took a poop, so I sad f**K it and bought a haltech, installed it, set it up, changed nothing else, and bam cranks up just like it should and was running like a champ untill I popped a ringland a couple days ago.

Post by **ZOMG.SR20** » Mon Sep 07, 2009 1:15 pm

I have a New stock Ecu....

Post by **nightsauce** » Mon Sep 07, 2009 2:35 pm

ZOMG.SR20 wrote:I have a New stock Ecu....

yea, straight from nissan? how much did ya fork out for that one....

Post by **mattblancarte** » Mon Sep 07, 2009 2:49 pm

What kind of injectors are in there, again?

Sounds like the tune is pooped on the stock ECU, or you have leaky injectors of some kind.

Who knows, though.

Website · Post by **mRodiek** » Mon Sep 07, 2009 3:33 pm

http://www.240sxforums.com/for....html

Something to try out, Im dealing with the same issue and Ive used 2 different MAFs and no change-Im trying the coolant temp sensor next then a new FPR.

Post by **kouki munster** » Mon Sep 07, 2009 4:08 pm

Why don't you download a sr fsm and check to see if your cts is bad or your fuel pressure is off, instead of just throwing parts at it.

Op try a different ecu, or try your ecu on another sr.

Post by **ZOMG.SR20** » Mon Sep 07, 2009 4:44 pm

nightsauce wrote:
yea, straight from nissan? how much did ya fork out for that one....

100 shipped

mattblancarte wrote:What kind of injectors are in there, again?

Sounds like the tune is pooped on the stock ECU, or you have leaky injectors of some kind.

Who knows, though.

370cc SR injectors that were Flow tested by DW

DriftBoy07 wrote:http://www.240sxforums.com/for....html

Something to try out, Im dealing with the same issue and Ive used 2 different MAFs and no change-Im trying the coolant temp sensor next then a new FPR.

Im going to go through all of that tomm

Website · Post by **mRodiek** » Mon Sep 07, 2009 4:52 pm

$100 FROM Nissan?

Post by **ZOMG.SR20** » Mon Sep 07, 2009 4:54 pm

I has friend that works in Nissan Dealer

Post by **xX RB Xx** » Mon Sep 07, 2009 4:58 pm

ZOMG.SR20 wrote:

I has friend that works in Nissan Dealer

im calling

so proof please

Post by **ZOMG.SR20** » Mon Sep 07, 2009 5:01 pm

its a code 63 ECu the Automatic ones are cheaper

but seriously I bought it from someone in the Nico classifieds

I already tested it in a running car BTW

Post by **xX RB Xx** » Mon Sep 07, 2009 5:08 pm

ZOMG.SR20 wrote:
but seriously I bought it from someone in the Nico classifieds

you liar!

Post by **ZOMG.SR20** » Mon Sep 07, 2009 5:20 pm

lol

Post by **kouki munster** » Mon Sep 07, 2009 5:23 pm

retard from other site wrote:AAC/IAC: The AAC valve (Auxiliary Air Controller) takes in the air ratio and puts it through the computer keeping a tab on how much air is entering the intake. Mostly it is the ECU's main idle control system and can deff control the A/F ratio.

WTF is this a$$ talking about? The IAC/AAC has 0 control over the A/F ratio, it just controls the idle speed by controlling the amount of air being allowed past the tb when closed.

The others are a good basic suggestions of what to look for if you are having problems running rich.

Post by **ZOMG.SR20** » Mon Sep 07, 2009 5:25 pm

kouki munster wrote:
WTF is this a$$ talking about? The IAC/AAC has 0 control over the A/F ratio, it just controls the idle speed by controlling the amount of air being allowed past the tb when closed.

The others are a good basic suggestions of what to look for if you are having problems running rich.

it controls the air into the intake in order to Idle hence AF ratio

Website · Post by **mRodiek** » Mon Sep 07, 2009 5:31 pm

IDLE Air Control Valve...hence controlling the idle, but I have heard from multiple sources that it changes the AFR as well.

Post by **ZOMG.SR20** » Mon Sep 07, 2009 5:32 pm

idk but i has new on of those also

Post by **kouki munster** » Mon Sep 07, 2009 5:49 pm

ZOMG.SR20 wrote:
it controls the air into the intake in order to Idle hence AF ratio

It controls the air being allowed past the tb, the only effect it has on mixture, is when it allows more air in the maf sees more air going past it, and the ecu increases the injection time accordingly to reach the target afr. The same thing happens when it decreases the amount of air being allowed past the tb, maf sees less air, ecu decreases injection time accordingly.

It has no control, it can just cause a very small change(if watching it on a wide band .1-.2 change) in the afr that is immediately compensated for.

Post by **Koshin** » Mon Sep 07, 2009 5:56 pm

lol @ the OP

Post by **kouki munster** » Mon Sep 07, 2009 6:23 pm

^Can I have your gloria?

Hmm.... running rich

Hmm.... running rich

Re: Hmm.... running rich (ZOMG.SR20)

Re: Hmm.... running rich (Chris28)

Re: Hmm.... running rich (ZOMG.SR20)

Re: Hmm.... running rich (ZOMG.SR20)

Re: Hmm.... running rich (kouki munster)

Re: Hmm.... running rich (ZOMG.SR20)

Re: Hmm.... running rich (ZOMG.SR20)

Re: Hmm.... running rich (mattblancarte)

Re: Hmm.... running rich (DriftBoy07)

Re: Hmm.... running rich (nightsauce)

Re: Hmm.... running rich (ZOMG.SR20)

Re: Hmm.... running rich (DriftBoy07)

Re: Hmm.... running rich (ZOMG.SR20)

Re: Hmm.... running rich (xX RB Xx)

Re: Hmm.... running rich (ZOMG.SR20)

Re: Hmm.... running rich (xX RB Xx)

Re: Hmm.... running rich (ZOMG.SR20)

Re: Hmm.... running rich (kouki munster)

Re: Hmm.... running rich (ZOMG.SR20)

Re: Hmm.... running rich (DriftBoy07)

Re: Hmm.... running rich (DriftBoy07)

Re: Hmm.... running rich (kouki munster)

Re: Hmm.... running rich (Koshin)

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