EffWun

Car gets driven once or twice a week for past few months now. Has the ultra small <4lb ballade battery and is on a tender every few days (outlets get used for other stuff often)

Driving to and from the smog station twice about 15 mins each way and had secondary air not registering twice.

No CEL and the pump is working.
???

edit: few things may try out tomorrow morning.
- drive 20+ mile drive cycle with battery that has stock ratings
- Look at 7.5amp back up fuse under dash
- air pump fuse under hood

cosmomiller

Billman knows the driving schedule to follow to allow the car to perform it's tests and register a proper function. You may have to dig to find it in other similar posts.

EffWun

I did find it in an old thread. I went back to get monitors checked and they tell me I might need multiple air pump cycles. Not sure on that but my reg is up, going to finish it and get a baseline extension until I get a notification of smog.

EffWun

Update: 200 mi later still doesn't register and followed different forms of driving cycles i.e. bill man and including the most recent found in the book

idle 20 seconds
2k rpm for 3 minutes
drive between 50-60 with no change in throttle for 60-90 seconds

only thing else I can do is change the 7.5 fuse under the dash and re-do the entire thing OR cut what looks to be 5+ ecu wires to install the air pump simulator...

Chuck S

I imagine several parameters in the ECU reset to zero when the voltage drops too far. Any reason for the 4# Ballade battery that's my first suspect?

-- Chuck

timg

If the battery voltage drops too low on starting, as often happens with small or old batteries, some or all of the emissions monitors can reset. Some may set almost immediately, others may take some more time. I've run into this issue on my own car before. Sometimes, charging the battery or a battery change fixed it. I was able to diagnose by logging. Any cheap OBD2 monitor can tell you when your readiness monitors set, and will show when they un-set...

Tim

EffWun

Forgot to mention I swapped to the stock rated battery few weeks ago. Autozone test it over 90% and cranks fast upon start up but it is also listed as a failed battery. Does not seem that the battery voltage drops too low since it cranks fast?

I got a pack of 7.5 fuse and will change it out and run on stock ecu even though very unlikely the greddy emu has anything to do with it as many and I myself have passed with the greddy emu plugged in countless times.
edit: all the fuses seem to be in good shape and functioning as intended

Ryland

Hello!

I see it’s been quite some time since you’ve had this problem; did you ever figure out the problem?

I have done so many different things, and even posted my own thread, but can’t figure it out

Billman250

Step one:

Start the car cold in the morning.

Immediately get out of the car, and put you ear against the bumper, under the drivers side headlight.

Listen for the air pump, it will sound like a little turbo. Continue to listen and make sure you hear the pump turn off, around 20-25 seconds after starting the car.

Ryland

Hey Billman!

I have looked around quite a bit on here and other sites for troubleshooting my secondary air pump, but haven't found anything that has fixed it. I used to have an air pump that seemed to be working, but have since deleted it in attempts to bypass the problem entirely, but it seems that with the delete I am still having the same problem.
I created a thread a while back and put in all the things I've done so far, and I was wondering if you'd have any ideas?
Here's the thread: https://www.s2ki.com/forums/s2000-un...eting-1200182/

Thanks!