mikeunreal2

I plugged a Kenji ECU in i purchased and it fixed my idle problem. The only other problem im having is my car is running SUPER rich. Its running so rich the idle is bogging down to about 200 every 30 seconds and almost stalling. The smell of gas is really really strong. Why would my car be running so rich? What should I do? I don't have a vafc to adjust the air/fuel ratio. HELP!!!

Mike

Relic1

what car?

is your CEL on?
did you get the right chip for your setup from Kenji?

mikeunreal2

Its a 92 civic with jdm b16a swap. I dont have a cel with his ecu. He garentees his work and garentees he gave me the right chip. My car was surging at idle before I put in his ecu, now its just idleing like hell and running SUPER rich...im confused.....

Mike

Mr Hammond

Most chipped ECU's including Kenji's (which I have owned in two different cars now and have been completely happy with) usually just add more aggressive fuel and timing maps. A little extra fuel to keep it safe. Each application is different which is why people should realize going in that an AFC, adj. fpr and even cam gears should be considered part of the installation along with a/f tuning.

YMMV.

eg8000rpm

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

mikeunreal2

I do have an adjustable fuel pressure regulator, and i turn it both directions and it doesnt help my problem. It still runs REALLY rich. I think the fact that its running so rich is causing it to bog out and almost stall at idle, its idling down to about 200 rpms and almost stalling. Now what? Is this just a tuneing issue or do you guys think there lyes a bigger problem. Mabye I should get a vafc?

Han Solo

YES, get a Vafc or some other sort of air/fuel controller

Mr Hammond

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mikeunreal2 &raquo;</TD></TR><TR><TD CLASS="quote">I do have an adjustable fuel pressure regulator, and i turn it both directions and it doesnt help my problem. It still runs REALLY rich.</TD></TR></TABLE>

I assume you saw these changes on the dyno with a wideband o2?

mikeunreal2

No. The smell of gas didnt disapear and my a/f mixture didnt move according to my a/f ratio gauge.

mikeunreal2

I dont understand how i can be running so rich. no one has explained it. Also, I dont see how my adj. fpr just didnt change my fuel pressure....

fmrprojects

you are running rich because the ecu u have is programmed to run rich. the pulse width has been increased for the injectors to spray for a longer period. even if you turn the pressure down in the fuel it wont help as much. the pulse width will still be same. i dont know if kenji can be tuned on crome or uberdata, but i think you should go get it tuned

mikeunreal2

there is no place around columbia to get it tuned. Why would this ecu be SO MUCH MORE than stock it makes no sense. Im running so rich its dangerous. There is no way its SUPPOSE to be this way.

Mike

mikeunreal2

bump, isnt running this rich going to destroy my motor...

sirshan

Im not sure about problems you had before...but my car was dying out because my Compression was too low and there was not enogh Vacuum at idle. Do a compression test...

I found my compression was at 100psi across all cylinders and they are supposed to be 190-200psi. I just installed some pistons, so something down there isnt right.

You should fix the problem before fouling your plugs. I stay away from chipped stuff like that...Im running Hondata S200. Had a Skunk2 ECU and ran into the "too rich" issue. Never again!

mikeunreal2

I wish i had a stock p30 ecu to try to plug in, see what it would do.

NA_H22_Ej8

any of your fuel lines busted?

schardbody

the base idle map should be the same as stock even with a chipped ecu, unless you are using bigger inj and it wasnt chipped for them. dropping fuel pressure will help the idle but will lean out at WOT in the upper range, you need to get some kind of afc. did this happen when you did the swap, or where you running a stock ecu before without a problem and only had the problem after the ecu swap. also, make sure the fuel return line isnt pinched off or something stupid like that.

mikeunreal2

ever since i got the car it hasnt idled/ran right. I just need to get a stock ecu and start there. Im not good with all this car stuff. mabye i shouldnt be driving a swapped hatch...

schardbody

ah you will be alright, just need to go through the car a little, maybe get with some guys that know cars a little better that can help you out. running rich isnt as bad as lean. i would be looking for a stock ecu though.

mikeunreal2

Could timing be affecting any of this? kenji mentioned my timing coudl be off, causing these complications?

Mike

HondaHead211

when u buy an aftermarket computer the base map that comes with the computer usually comes really rich to keep the engine form leaning out (which is worse). its not really gonna affect ur performance unless ur puttin down crazy numbers ull just go through gas a little faster

mikeunreal2

running rich can damage your motor....and it will destroy your performance...

schardbody

running rich will not hurt the motor so much as running lean. yes it will cause alot more carbon deposits and stuff, but not in any way that it will decrease the life of the motor. it will kill performance.

lsvtecracer

Most aftermarket chip out there will cause your car to run rich. The timing map is usually more aggressive so they give it a little more gas as well to be on the safe side. Have you check your timing and made sure it's set at 16 degree. Change out your plug and regap them. Just a few suggestions. There's really only one way to get the car running right and that's to put it on the dyno and make change with the vafc.

If you want, I can burn you a b16 basemap from crome or uberdata just so you can see if it help out your problem at all. i'll leave the lower end the same and richen up the top end a little. just pay for the chip and shipping.

steve

mikeunreal2

so if i still surge with a virgin p30 ecu, but i dont surge at idle with kenjis chipped ecu, but i run extremely rich and it bogs down to like 200 and almost stalls what does this tell you? Timing issues? vaccum leak? need to be tuned?

Mike