Is throwing a CEL from too much fuel or not enough?
 

I am running super rich and when I boost there goes that damn CEL. What do you think its from?

Re:Is throwing a CEL from too much fuel or not enough?
 

Do you have check valves or a Missing Link?

Re:Is throwing a CEL from too much fuel or not enough?
 

I have neither, is that the problem? Will the missing link keep me from bucking in lower rpm boost transition?

Re:Is throwing a CEL from too much fuel or not enough?
 

That might be your problem.You can get one athttp://www.importparts.com/.Scroll down halfway and you will see it on the right.

Re:Is throwing a CEL from too much fuel or not enough?
 

What are you using for fuel management? If you are using an FMU you will need a missing link/check valve.
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Re:Is throwing a CEL from too much fuel or not enough?
 

I am using the SAFC2 for management. It is running very rich and the SAFC2 doesn't lean it out enough. I try lowering the fuel pressure and it helps in low throttle but it isn't enough pressure while in boost.

What do you think I am doing wrong?

Re:Is throwing a CEL from too much fuel or not enough?
 

I would keep the fuel [ressure as close to stock as possible.

What are all of your settings along with injector size? The S-AFC should allow you to lean it out more than enough unless you are running 750cc+ injectors.
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Re:Is throwing a CEL from too much fuel or not enough?
 

I am running 450cc Mitsu blue top injectors. Endyn Bosch 405lph fuel pump, 8AN SS fuel line from tank to engine. AEM high volume fuel rail. Aermotive AFPR.

Will the CEL cause me to run super rich? I try running factory fuel pressure and it floods out and won't rev past 4000rpms.

Do you think the CEL is my problem?

Re:Is throwing a CEL from too much fuel or not enough?
 

DON"T boost while the cel is on. You will not get enough fuel for boost. You have problems with your settings somewhere. What are your settings on your AFC?
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Re:Is throwing a CEL from too much fuel or not enough?
 

Dr Boost

My SAFC2 Setting are:

Low throttle rpms High Throttle rpms
1600 -47 -38
2000 -43 -36
2400 -43 -35
3000 -43 -33
3400 -42 -33
3800 -42 -33
4000 -42 -30
4200 -40 -28
4600 -39 -28
5400 -31 -25
6200 -25 -25
7200 -27 -25

Dec Air is Ne1 10% and Ne2 10%
Th point is Low 71% and High 72%

Question what is the sensor type for a B18B1 Integra engine? It doesn't have a MAF meter like eclipes and Nissans, so is the Sensor type Hot Wire, Flap, Pressure, or Karman?

Sorry for the length but I have to know what the problem is cause I get the freakin CEL everytime I boost.

Re:Is throwing a CEL from too much fuel or not enough?
 

Oh, and fuel pressure with the vaccum line is 24psi idle at 850rpms and 32psi at full throttle.

Thanks

Re:Is throwing a CEL from too much fuel or not enough?
 

I would try -35 across the board. The sensor type is pressure and should be 06/06. The arrow should be pointing up like this /. Do you have any gauges? Why do you have the Dec. air set? You really don't need that unless you are having trouble with stalling after hard pulls.
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Re:Is throwing a CEL from too much fuel or not enough?
 

Well, I changed the censor type to pressure and no more cell for now. Just reving I can get 5psi and I had no cell. Once I put it on the road again I'll be able to tell you.

But I am still running too rich. I think my fuel is puddling because I have tons of black smoke coming from the exhaust. I turned the fuel pressure to 31psi just so I know I have the pressure but I am still getting to much gass.

Do you think all of the high volume lines, pump and fuel rail are making me get too much gass?

If so what can I do to lean it out?

Re:Is throwing a CEL from too much fuel or not enough?
 

still think your too rich because of afc settings.. -25% is pretty darn rich.

also, stock fuel pressure is 28psi idle and 38 WOT.

Re:Is throwing a CEL from too much fuel or not enough?
 

That -25 is at the top of the rpm band. I am talking about running rich when not under boost.

Re:Is throwing a CEL from too much fuel or not enough?
 

u have -8an lines for fuel delivery, ,what about return?

Re:Is throwing a CEL from too much fuel or not enough?
 

Maybe thats my problem. I have 8AN going in, but factory 1/4" going back to the tank. Would that make me run too rich?

Also, could my injectors be clogged and out of whack?

Re:Is throwing a CEL from too much fuel or not enough?
 

Another update: Still throwing cells at 8psi. I installed the AFC2 just as Apexi recomends.

Question, When you are doing the AFC Hack; do you install the AFC differently from what Apexi calls for?

Re:Is throwing a CEL from too much fuel or not enough?
 

no, but it's important that you have the pressure sensor in and pressure sensor out correct (white and yellow)

Re:Is throwing a CEL from too much fuel or not enough?
 

make sure in the sensor type list everything is 0 in 0 out. except for pressure which should be 6in 6 out.

Re:Is throwing a CEL from too much fuel or not enough?
 

HOw hard would it be to make the return lines -8an ?

So much volume going in and not much out.

thats like draining a hottub w/ a straw but re-filling it w/ a garden hose at the same time, guna over flow right.??

Just an idea cuz i know that much -8an line is expensive.

Re:Is throwing a CEL from too much fuel or not enough?
 

Well, I left factory going back because the 87 1st gen Rex's came with 1/4" fuel line going from and coming back to the tank. I didn't think I would have to worry about it since it is a return line that doesn't carry much pressure.

Let me check my wires and I'll let you guys know. Also, can I run the "blue wire mod" from the A/F ratio meter wire? Or does it have to come straight from the ECU?

Re:Is throwing a CEL from too much fuel or not enough?
 

You can. Might not be exact though.

Re:Is throwing a CEL from too much fuel or not enough?
 

Well the blue wire mod really isn't exact and .98V is about the same as .85V because the signal is not as strong and accurate with the factory O2 sensor.

Anyway, I am still throwing CEL's. At full throttle the cell comes on around 4500rpms and the EGT's soar to 1000degrees F. Normal Interstate driving at 3000rpms EGT's are 800degrees F. 3500rpms is 900-950F. The cell came on at 8psi so I tried 6psi and it still comes on.

Hi settings are
rpms
800 to 2600 -31
3000 -21
3600 -19
4000 -17
4600 -15
5000 to 5600 -13
6000 to 7200 -10

I am at sea level with temps around 90 and humidity up to 120%. Any richer and the car starts sputtering. Any suggestions?

Re:Is throwing a CEL from too much fuel or not enough?
 

thats rediculously rich...which cel is it again?

Re:Is throwing a CEL from too much fuel or not enough?
 

You are throwing a CEL because your MAP sensor is getting to much voltage....you need to lean out the s-AFC so your map get's less voltage.

Re:Is throwing a CEL from too much fuel or not enough?
 

Cel is solved. I found that I was getting a CEL from running too lean . Yeah, I know my settings mean way too rich but the AFC wasn't doing enough so I upped the fuel pressure. I am now running 8psi with no CEL but my fuel pressure is at 54psi. Yeah yeah, I know it sounds sick but it works.

It now drives very smooth. I will tune for 10psi next. I think I am getting close to maxing out the 450cc injectors. I think the T3/T4 is flowing way more air than the stock fuel pressure can handle.

New settings are
rpms Low High
800 -25 -31
1400 -36 -31
2000 -39 -31
2600 -38 -31
3000 -40 -26
3600 -40 -32
4000 -41 -34
4600 -41 -35
5000 -41 -34
5600 -38 -35
6000 -38 -34
7000 -38 -32


What is the max pressure 450cc can take?

Re:Is throwing a CEL from too much fuel or not enough?
 

why the hell do you have your settings going up and down?

Re:Is throwing a CEL from too much fuel or not enough?
 

There is no way -10/-20 was too lean. You shouldn't have to up the fuel pressure. The injectors and the AFC should provide way more than enough fuel for you.
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Re:Is throwing a CEL from too much fuel or not enough?
 

Well I lowered the fuel pressure to 48psi and leaned out the injectors to -47% across the high throttle settings and she pulls like a MOFO BEAST :o

My entire problem was that I was running too rich. Even when I smoothed the power ban with the AFC; I still wasn't making the same amount of power. Now it spins 3rd to 80mph then some of 4th and just pulls the rest of the way.

Special thanks goes out to the entire HMT board and members
for pointing me in the right direction. I owe you guys big time. 8)

Re:Is throwing a CEL from too much fuel or not enough?
 

look out for detonation..cause -47% is pretty low..have fun boosting.
It took him a while to get it..but he got it eventually. 8)

Re:Is throwing a CEL from too much fuel or not enough?
 

I am getting very little detonation at 10psi, I mean very little; but I don't think there is anything I can do about it.

I tried richening the AFC and I just started loosing power. I adjusted fuel pressure higher and I lost power again. I know boost is not equal with turbos and yes you guys maybe running 14psi on T25's or IHI turbo but the turbo setup I am running is making a lot more power than what the AFC can tune out.

I am scared that anymore boost may blow the engine. Yes you guys say Bseries are good to 12psi but thats quotes on a 14b,T3, or a small T3/T4. Jeff didn't blow his engine running 28psi or something crazy, it was built and he still blew it with moderate boost 14psi with a standalone fuel manangement system.

I think I have met the power limits of the SAFC2. Yeah I could up the boost and richen it up more but I won't be making efficient power...meaning I would be making crazy power at the expense of detonation that only the fine tunning of a standalone fuel management system can provide.

Re:Is throwing a CEL from too much fuel or not enough?
 

a few things: any detonation is too much, you are going to lose a little power when your richen it up for the most part, and jeffs motor wasnt built

there is no way you've "met the power limits of the safc2"...turn your fuel pressure down, and richen up your afc settings like everyone is telling you to...also, play with your timing to get rid of the detonation as well

Re:Is throwing a CEL from too much fuel or not enough?
 

I am going to have to try that. 8) It's just that I loose power and it starts running shity when I richen up the AFC. When I richen the AFC the cars loads up with fuel and sputters from the injectors loading up, thus making the power ruff and not smooth.

It's still running a little fat because when I let off the gas sometimes I get a 6ft flame coming out of the downpipe. And I can here it pop sometimes when cruizing from getting too much gas. I just need to get it put on a dyno so I can know for sure how I am running because trying to tune with the butt dyno and an EGT is not really efficient.

There is probably plenty more power achievable but I don't have a wideband to help me tune. The blue wire mod sucks ass because it shows wrong O2 sensor volts and will have you running waaaaaaay too rich. And the Air fuel ratio gauge is worthless because it just bounces back and forth and then cuts off.