ihiryu

My car is bucking and jerking non-stop.

I keep staring at the AE tables and charts, and it makes no sense to me.

Also the alternator control keeps shitting the bed. Been in contact with Rev about it, but it's not looking good.

curly

iTrader: (25)

Turn the threshold up. Way up. Bring it down until it starts bucking then back up a bit. Make sure your tps is steady, same with map sensor.

ihiryu

I tried a few different settings. 9, 12, 50, 100, 150, 200, and 300.

All three give me the same reaction more or less.

Anything below 9 gives me accel at cruising. Above it doesn't do it, but reacts way weird if I go straight to wide open

Braineack

iTrader: (62)

doesn't sound like the greatest way to tune...

sounds like a poor way to tune.



very poor.




much sad.

curly

iTrader: (25)

What would you suggest?

Braineack

iTrader: (62)

actually tuning AE.

curly

iTrader: (25)

Well it's a start to get it to stop bucking. It wasn't meant as a replacement for something lik DIY's writeup. But your suggestion, super helpful.

18psi

iTrader: (76)

even if you turned off AE it shouldn't buck like crazy. methinks you've another problem. Can't open your msq from work or I'd look it over

Braineack

iTrader: (62)

turning AE off makes herky jerky.

tuning AE prevents it from going lean when you hit the throttle, which is what causes the poor response.

curly

iTrader: (25)

I've never had an issue with running with it off, as I did when my tps signal went wacko. Wouldn't keep it like that, but it's shouldn't be as jerky as a over reacting AE.

So question for you AE masters. I try to tune the lean spots down with AE, but the little graph below the chart shows a rich spike too. The more I tune out the lean spike, the bigger the rich spike gets.

hornetball

iTrader: (4)

I'm with Vlad. Sounds like your overall fuel tune (VE map) is lousy. I'd disable AE and work on that first. If you're well-tuned, you should need almost no AE at high RPM and just a bit at low RPM to get over off-idle flat spots.

I'll bet you're super-lean off-idle.

Are you using TPS-based or MAP-based AE? If MAP-based, be aware that MAP sensor noise can trigger an AE event. Use TPS-based if you can.

ihiryu

I am using 100% tps.

Yeah, that's what I'm leaning towards as well. I never really worked on my VE map. (been using the one rev supplied).

I was reading a few other posts, but I wasn't aware that I should have really dialed in my VE map first.

However, I would still like some explanations on AE. I truthfully don't know what the hell I'm doing. To my understanding, TPS Dot is the rate of change (based on time). So if I adjust that, it causes me to go way lean, then way rich, and if I adjust the TPSdot to a larger number, it causes it to go way rich, then it'll clean up.

hornetball

iTrader: (4)

If your VE map is not tuned, then your observations reflect the poor VE map, not the effect of AE. VE is, by far, the most important part of this.

ihiryu

All right. I've got the VE map dialed in pretty good.

I took my TPSDOT and turned it up to 1000 or something crazy to keep it from activating.

Now when I shift, it goes lean then comes back. It's really annoying when I'm trying to take off since it goes lean, and wants to bog.

So, should I now work on my AE? I feel like I've got my VE tuned well enough.

18psi

iTrader: (76)

post your ve map

also

MegaSquirt Acceleration Enrichment Tuning

don't miss the bottom where it links to ms extra for more reading

ihiryu

I feel like I can add a bit more timing, but am a little scared. I haven't quite figured out the knock sensor settings yet, so I get a lot of noise even at low RPMs.

So probably no more timing until I can get some money on the dyno.

18psi

iTrader: (76)

neither one of those is your ve map

although both those tables look fine as a starting point

ihiryu

Fuel VE Table? It's the last image.

Braineack

iTrader: (62)

the whole point of AE is to remove those lean spikes when you apply heavy throttle to increase smoothidity[sic]*.

EAE takes it further and keeps AFRs stable during slower manipulations of the pedal.


*I just made up this word.

18psi

iTrader: (76)

My bad, it wasn't showing up for me, I see it now.

It needs a bunch more smoothing and tuning - you have very sharp transitions in a lot of places that are for sure causing spikes and dips.