just got my afx on and my battery light wont shut off now?

[jayson427]

so i just hooked up my afx and my battery light wont go off. will it still remember everything with the light on or will it refresh everytime? im not to happy with it yet, it seems like i have lost power so im not sure if it just needs more time to dail in or what. i drove it half throttle for a few miles then hit it. i expected alot more out of it. the afx did help my bottom end and the afr seems alot smoother because it will idle alot better but still not right. it seems my motor runs better with the vaccum line off of the throttle body rather then on. sometimes when i take it out of gear my rpms wont drop right away like they should and when i come to a stop it doesnt want to idle properly. i just put a new iac on when i installed the new ecu. any suggestions? thanks if anyone can help or throw some ideas out there

 

[Fotowntalon]

For the Idle, try burping the coolant. As far as the AFX, try switching the old ecu back on to see if that takes care of the battery light, maybe for some reason you got a defective one? If thats not the case, your battery could be dying. Also are you making sure to run at least 91 octane? The afx takes a fair while to dial in, but is dyno proven, to say "it doesnt" feel faster may just be your butt dyno needing to be re-calibrated.

 

[jayson427]

What do you mean by burping the coolent? With my stock ecu my battery light never came on. I have an optima battery and im running 91 all the time. I wasnt sure how long it takes to dail in but I was worried with the battery light bring ob that it would kind of restart what its computed. When I shift gears my rpms don't drop they keep climbing untill I let out the clutch

 

[Fotowntalon]

I recommended that you switch back to stock and if the light still remained on then you knows its your battery not the ecu. This would eliminate the fact that you have an electrical problem with the new ecu. Its always possible the battery/alternator or something of the like went out at the same time as the ecu swap, unlikely but possible.

For burping the coolant it means getting the air out of the cooling system. Air in the cooling system can make some really weird things happen with the idle

 

[teklein]

I used to have this issue on my car - I went with a Lorenza Fuel Systems 20% overdrive alternator pulley. For a Neon, but it works fine.

You effectively end up with only 10% less output than stock instead of the 30% from the AFX.

 

[Slo2gen]

I used to have this issue on my car - I went with a Lorenza Fuel Systems 20% overdrive alternator pulley. For a Neon, but it works fine.

You effectively end up with only 10% less output than stock instead of the 30% from the AFX.

He is talking about an AFX ECU unless I'm missing something You did order the correct year(pretty sure you did but want to cover all the possibilities) AFX correct? It will take it several drive cycles to learn your mods, infact the ecu actually never stops learning, its always looking at data that you have from your map/spark tables to the ambient air temp and what not. Your battery light well, like Fowtown said, swap in the OEM ecu and see if it fixes it. Its a common problem for the voltage regulator in the ecu to go bad and if thats all it is, it can be fixed by an external regulator. If it was me though and I just paid the expensive price of a AFX ecu from Howell I would want everything to function properly. Do you have a DVOM? If so you can check what the battery voltage is at rest and with the car running, then again at idle and at 2000 RPM's and get back to us.

 

[Black420RS]

I used to have this issue on my car - I went with a Lorenza Fuel Systems 20% overdrive alternator pulley. For a Neon, but it works fine.

You effectively end up with only 10% less output than stock instead of the 30% from the AFX.

I think that you are confusing the AFX ECU with THE AFX UDP (that is 30% less)

 

[jayson427]

Sorry yes I meant afx ecu but yeah that would make sense and I do have an underdrive pulley. I havnt been able to check the voltage on it yet but ill post what it is soon. Im positive I got the right year and my other ecu had issues so I think it would keep the battery light off if I hooked it up.