I'm using the AFC hack and the car was fine for about a week, then started to get lean, and then even leaner. So I figured fuel pump ( which I REALLY didn't wanna have to drop the tank ), but I installed my Stealth TT's factory fuel today and it didn't change a thing...

I idle between static and rich, but as soon as I hit like 0-1psi it leans out so hard that the car bucks and won't go !!!

I checked the FPR vaccum line to make sure it was getting vaccum, and I replaced the fuel filter also. I Also upgraded the factroy fuel pump power wire to a 10gauge power wire.

My A/F says lean, but my plugs tend to be a little "sooty".

It runs fine at crusing as long as I don't push the pedal a little to far and hit boost..

Any idea would be welcome... I'm kinda stumped... I'm going to a friends house tonight to swap injectors to test that theroy...

 

The bucking and sooty plugs probably mean your pretty rich. i'm gonna guess you have an autometer A/F guage. no? what kind of settings are you using?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bailhatch &raquo;</TD></TR><TR><TD CLASS="quote">The bucking and sooty plugs probably mean your pretty rich. i'm gonna guess you have an autometer A/F guage. no? what kind of settings are you using?</TD></TR></TABLE>

I agree, you are more than likely way rich and the autometer gauges are about worthless. But what does the exhaust look like? are you leaving stains on the floor?


Rob

 

Any AFR gauge is next to worthless unless you have a wideband O2 sensor.

 

You don't have any map limiter devices like a missing link?

Sonny

 

The afc hack needs to see the map voltage. It just cant run more than the stock map sensor can handle~ 11 psi.


Rob

 

The most it runs is 10psi ( when it was running correctly ), I sold my missing link and don't have any map modding cevices b-sides the AFC.

My AFC settings are -38 at idle and -28 across to 6000rpm on low throttle. I haven't even changed the WOT settings b/c it can't even run 1 psi accerating to 40mph.

Yes the A/F guage is autometer and I agree that "black plugs" mean rich, but this just screws me up, rich plugs, but lean A/F guage..

Even if it is running overly rich, do you guys think that it could be running so rich that it would bogg the car down at 1psi ??

BTW thanx for the replies..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 89dxhunchback &raquo;</TD></TR><TR><TD CLASS="quote">Even if it is running overly rich, do you guys think that it could be running so rich that it would bogg the car down at 1psi ??

BTW thanx for the replies..</TD></TR></TABLE>


UHMMM

YES !!!
Rob

 

what are your hack settings?(hi/lo throttle, sensor type) what size injectors?what motor? what ecu?


also, my buddy run's 13 psi daily on his SI running the hack, no cel's, and I've had my ek/b16 up to 15psi with no cels.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 89dxhunchback &raquo;</TD></TR><TR><TD CLASS="quote">
Yes the A/F guage is autometer and I agree that "black plugs" mean rich, but this just screws me up, rich plugs, but lean A/F guage..
..</TD></TR></TABLE>

Your plugs are gong to give you a more accurate reading, the only thing the Air/fuel ratio gauge will tell you is that your o2 sensor is sending a voltage to your ecu, .....thats ALL............It will only read accuratly (or semi accurate) close to stoich...

 

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


UHMMM

YES !!!

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

Rob is right to much fuel will cause you to brake up under boost (bogg) what is your fpr at lower it a little and see if that helps also I have had that gauge in my car and it did nothing but confuse me same with my friends type r turbo hatch those auges are junk imho

 

Ok.. Let me try to answer some questions.
DSM 450cc injectors
The motor is a SOHC Non-vtec vtec motor ( hehe ). Its a D16Z6 block with an D16A6 head which is basiclly a reverse "mini-me". It lowers compression to give me a little bit of room for error with tuning ( compression is 8.5/1 ). ARP Head studs and Mr/ gasket MLS HG. Stock A6 Cam. 91' PM6 Ecu ( un modded ), DX tranny, D16Z6 intake manifold, Volvo Adj. BOV, Starion IC, HF manifold ( ported ), and 3 autometer guages ( Boost/vaccum, ele. FP, and A/F ). I'm going to get my B&M FPR from my friend ( I let him borrow it when he swapped to a Z6 intake ).

The AFC settings = sensor type- 4cyl TPS pointing kinda up and to the right.
narrow throttle to WOT = 75%--%76
Sensor IN 01----Out 01
And the duel is turned up to -28 across the narrow throttle range ( minus -38 at idle ).

Stock Cam gear and stock ignition.

Nitrous was a lot easier to tune... install, flip a switch !!!

 

would ur sensor be differnet from mine? mine's set to 06/06 in/out. i'm runnin obd1 vtec. also, try leanin out ur settings. i think -28 is too rich for your setup. for a b-series motor yea it'll be ok. but i think your stock injectors were smaller then 240, so i'm thinking you'll need to lean it out more. hope this helps. most b-series owners are running -30%--40% so i dont see why you would be running richer then a b-series.

 

I agree with some others here.. I think you're way too rich.

I'm running a B18B... with 550cc injectors with the hack... just the stock FPR... not a rising one... No map check valves or anything... I manage to keep the map voltage under the limit by doing a -50 most of the way on the AFC... cept up top... i lower it to -40 odd... and it's still QUITE rich at 10lbs boost.

I rarely get the bucking... sometimes right at startup... be if i let it warm up for a minute then it's fine.

 

To all you guys that said it was running rich.... YOU WERE RIGHT !!!

I leaned it to -40 across the board and it screams now !!! The A/F sucks ***, but I don't think its the A/F really, I'm thinking its the O2 sensor. I just got a "running too lean" code after letting it idle for 2 minutes.

Thanx for all you guys help, I guess I need to get to a dyno !!! Or buy a damn wideband ( $400 turbo kit, with a $400 O2 sensor doesn't sound right... ).

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rjardy &raquo;</TD></TR><TR><TD CLASS="quote">The afc hack needs to see the map voltage. It just cant run more than the stock map sensor can handle~ 11 psi.


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

Right...I was just asking because if he had something like the Missing Link in there, it would prevent the VAFC from seeing full MAP voltage when he transitioned into boost.



Sonny

 

The car still has its weird moods, but it loves boost. It runs great when under boost, its cruising or under vaccum that it seems to dislike now... But 100% better than before !!!

 

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

Right...I was just asking because if he had something like the Missing Link in there, it would prevent the VAFC from seeing full MAP voltage when he transitioned into boost.



Sonny</TD></TR></TABLE>
oh I got ya


Rob

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 89dxhunchback &raquo;</TD></TR><TR><TD CLASS="quote">The car still has its weird moods, but it loves boost. It runs great when under boost, its cruising or under vaccum that it seems to dislike now... But 100% better than before !!!</TD></TR></TABLE>

glad Honda-Tech could help! thats what its here for!!


Rob

 

Told Ya!

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 89dxhunchback &raquo;</TD></TR><TR><TD CLASS="quote">Thanx for all you guys help, I guess I need to get to a dyno !!! Or buy a damn wideband ( $400 turbo kit, with a $400 O2 sensor doesn't sound right... ).</TD></TR></TABLE>

sounds right to me!