Hahn Portfueler Tuning Question

[Bones420]

Anyone have any experience tuning the Hahn Portfueler?? I'm running to rich but am not able to lean it out. For ex: on the program 10 is 0, anything above 10 is making it rich, anything below 10 in leaning it out. My problem is that where i need to lean it out it's already at the lowest setting which is 0, understand?? I can't get an answer from Hahn, through e-mails or phone calls. Any help is appreciated as always...

 

[dylnwit]

If your rich across the board, lowering your base fuel pressure should lean things back out some, since less pressure means less flow.

 

[jrohner]

Where are you rich? Everywhere including having low fuel trims or just full throttle?

 

[1slow97]

are you tuning both tables??

 

[Bones420]

Where are you rich? Everywhere including having low fuel trims or just full throttle?

At WOT it's pretty well set, don't need to change there. The problem lies at idle and at what i like to call "BABYING IT", just driving around not getting on it hard.

are you tuning both tables??

Yes, as i said previously the "0" point is 10. So 9,8,7,6,5, etc. would be leaning it out but as i also said before it's already at zero so i can't lean it out anymore.

 

[lowexpectations]

are you tuning both tables??

Can you elaborate on tuning both tables?

When I was looking at Bones setup table A was fuel adjustments and table B was timing adjustments.

 

[1slow97]

Can you elaborate on tuning both tables?

When I was looking at Bones setup table A was fuel adjustments and table B was timing adjustments.

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NO, both tables are fuel they got to be matching....Surprised you ant had a melt down yet.. Portfueler for 420a don't have timing adjustments.

 

[lowexpectations]

Interesting. I was going off of Split Second

I know that is not off the hahn website but it is from the company that made the software.

Bones when you get a chance email me some of the logs we made.

 

[Bones420]

Interesting. I was going off of Split Second

I know that is not off the hahn website but it is from the company that made the software.

Bones when you get a chance email me some of the logs we made.

CHECK

 

[lowexpectations]

So does anyone have any kind of instructions for tuning with the portfueler? I am thankful that I dont own anything from Hahn as I have been trying to get in contact with someone from that company for almost 2 weeks now and have not had a returned phone call or a returned email.

 

[1slow97]

Interesting. I was going off of Split Second

I know that is not off the hahn website but it is from the company that made the software.

with the portfueler. a map is for one set of injectors and b map is for the other set. if both are not tuned (copy and paste map a to b) the other 2 cylinders will go lean and pop the motor.

 

[Bones420]

with the portfueler. a map is for one set of injectors and b map is for the other set. if both are not tuned (copy and paste map a to b) the other 2 cylinders will go lean and pop the motor.

Both maps are identical, buy i still can't lean it out.

 

[Bones420]

Where are you rich? Everywhere including having low fuel trims or just full throttle?

Seems to be rich mainly at idle thru mid-range, at WOT it's good.

 

[Shadow98]

Are your pirmaries injectors stock and what is your fuel pressure at?

 

[lowexpectations]

I believe it to be his fuel pressure after talking with Hahn fianlly. Since I am not the most familiar with the 420a can you guys give me a little help on something. Where do you guys have your afpr vaccume source tied in at? Hahn was telling me that the vaccume hose needs to be tied into a source that only sees positive pressure and does not see vaccume. This did not make a whole lot of sense to me so I thought maybe someone else could enlighten me on it. Currently Bones has the vaccume line tied into his aftermarket intake manifold which leads me to believe he would see vaccume on it while not under boost and positive pressure on it while in boost.

Last time I was able to be in the car with him at idle his a/f was in the low 10's and it was pretty rich while under light throttle(crusing) but his a/f was pretty decent under boost.

Also I know that with my ecu if it tries to pull a excessive amount of fuel and maxes out a fuel trim it will eventually give up on trying to controll the fuel trim and go into open loop mode. Does the ecu on the 420A do this as well?

Thanks

 

[Bones420]

Are your pirmaries injectors stock and what is your fuel pressure at?

(4)Accel 500cc Fuel Injectors * (4) 195cc Fuel Injectors

 

[Shadow98]

So, what is the fuel pressure at?!?!

 

[rideyamaha287]

so to bring up an old thread im trying to figure out how to tune the portfueler..so what should the base fuel pressure be at...

 

[bmxunderground]

In the Hahn setup paperwork it supplies you with the proper fuel pressure to achieve. I believe it was in the 40's. I'll look in my info and see. Good luck with your unit however, mine has not been cooperating since day one.