Running ARAP bin. I'm using GMECMedit.

Deactivated PE by zero'ing the PE Vs coolant temp table.

I'm checking for AE by entering a stable cruise mode at ~55 mph, jabing throttle a little (way more than 3% TPS) and watching the WB.
WB voltage starts at abt 2.55v then raises to abt 2.68v when throttle is jabbed, then returns to 2.55v within abt 1.5-2.0 secs.

When I compare all the AE related tables and constants to the ARAP bin, they're all the same.

Min TPS to activate AE is at 3.7 %.
Min delta LV8 to enable AE was 20, then 10, now zero, no help.

PE seems to work great (when it was enabled), but there seems to be no AE at all.

I should see something on the WB when I jab the throttle shouldn't I?

Any ideas??

 

What are you using to read the WB's output?.
If a DVM then the display rate of the meter, maybe so slow that your missing the AE event.

Some engines don't take alot of AE, so there is no real pump shot, and what there is a just a real short event.

Try idling along at 5 MPH, and giving it a large momentary stab of the pedal.

Disabling PE is flirtin with the devil.

 

I'm using a Fluke 77 meter. Not sure of it's refresh rate, but it sees the momentary lean condition.
The LED indicator is a couple of projects down the road at this point.

At idle I get a slight hesitation when I poke the gas.
At highway speed the hesitation isn't real noticeable via the butt dyno,
but a do see the mixture lean-out.

I tried goosing it at low speed, but couldn't see any enrichment there either.

I've been very careful abt not sticking my foot into it with the PE disabled.
To make up for no apparent AE, I have PE set-up so it kicks in fairly easily (30% Min TPS), and didn't want to confuse AE and PE on the WB.

There's a few tables and a couple of constants in the ARAP that seem like they would effect AE, but so far I haven't seen any change.
Any suggestions?

 

You need the LED or at least 15 frame/sec data logging to see it. So far your just seeing the lack of it, and like I said earlier, not engines need alot of AE.

A reasonable starting place is cutting the TPS and Load, as applicable in 1/2 and seeing what that gives you.

How much of a change have you been making, that you haven't seen a change?.

 

i did a ae tunning post not so long ago. i think the title was $6e $32b maf ae tunning.

 

These are the values I’ve been looking at:
All values were compared to the ARAP file I downloaded and all matched.

Min % TPS for AE= Has been 3.91% the whole time. Seems low enough.


LV8 accel enrich coolant factor VS coolant temp; 176 to 262 was .05 now .15= no change


Accel enrich %BPW Factor VS async pulse; all rows 0.5 now 1.0= no change


AE VS change in LV8 ; all cells increased by 20%.= no change


AE pulses Vs coolant temp; all cells from 12 to 18.= no change


Min delta LV8 for AE from 20 to 10, then to 0 .= no change


Max enrich async pulse width was .02 now 2.0 msecs. = no change

I saw Funsticks’ tuning article, but nothing jumped out at me as something that would prevent AE altogether.

 

a slow responding meter that didnt create enough delta could prevent ae.

 

The meter refresh rate does prevent fine resolution, but it seems to refresh fast enough to see the eng go lean when the throttle is mashed.

 

try lowering the delta enables in the constants and see if it improves.

 

ZZ28ZZ, (I found this on a search) so I'm bringing it back from the dormant.

Did find any resilution to your problem???

I too have a slight bog at tip accel. What Accel Enrich table is the best to get a bit more fuel at throotle tip in???