Accel enrichment throttle tip in issue after ethanol
Thread Starter
Newbie
Joined: Nov 2012
Posts: 43
Likes: 0
From: Czech rep.
Accel enrichment throttle tip in issue after ethanol
Hi, just converted USDM IX(88590015) to E85, everything feels good(950cc EV14 injectors, LFT are ok). But have notiecable bogging/lack of TPS accel enrichment just on idle when i first step mid/hard on throttle. I can see also little drop on needle 800->700->rev.
So its around idle rpm 800-1000, its feel everytime when i just want to drive.
Accel at 1500+ rpm is nice, mabe little overrich(jumps under 14afr, on harder throttle moves) up to 3000, then spot on...
I tried add(or maxed) normal accel enrichment table, at 500+1000 rpm, almost no effect.
Doubled async accel max pulsewidth, and tried to put some (10-20) at these rpm in async accel rpm adder.
Tried to enrich high octane fuel table in upper loads around at these low rpm.
No effect at all.
I will try async accel multiplier vs tps delta, i dont have scalling for it today, but if this help, i will need to adjust other tables, due no problem in others rpms.
Any more ideas, please?
So its around idle rpm 800-1000, its feel everytime when i just want to drive.
Accel at 1500+ rpm is nice, mabe little overrich(jumps under 14afr, on harder throttle moves) up to 3000, then spot on...
I tried add(or maxed) normal accel enrichment table, at 500+1000 rpm, almost no effect.
Doubled async accel max pulsewidth, and tried to put some (10-20) at these rpm in async accel rpm adder.
Tried to enrich high octane fuel table in upper loads around at these low rpm.
No effect at all.
I will try async accel multiplier vs tps delta, i dont have scalling for it today, but if this help, i will need to adjust other tables, due no problem in others rpms.
Any more ideas, please?
Post a log of RPM, TPS, IPW, and AFR(from your Wide Band Oxygen Sensor) so we can see what is happening. It is difficult to say what is causing the problem without more information.
Thread Starter
Newbie
Joined: Nov 2012
Posts: 43
Likes: 0
From: Czech rep.
I know, but i have AFR sniffer in tailpipe, so its delayded, unusable on idle reving.
But i realized opposite, i removed all my touches(during trial-error method) from async accel tables, and lowered normal accel table upt to 1/3 of original value at 500+1000 rpm. Its much better, not the best, but can be live with.
I tried to make it best as much as possible, async mutliplier VS tps delta have influence, but i dont understand the "TPS delta" axis( 0% to 12.5% ). I dont know on which trottle moves where in table may i adjust. On low but rapid throttle opening still little hicups, on harder rapid open feel ok.
But i realized opposite, i removed all my touches(during trial-error method) from async accel tables, and lowered normal accel table upt to 1/3 of original value at 500+1000 rpm. Its much better, not the best, but can be live with.
I tried to make it best as much as possible, async mutliplier VS tps delta have influence, but i dont understand the "TPS delta" axis( 0% to 12.5% ). I dont know on which trottle moves where in table may i adjust. On low but rapid throttle opening still little hicups, on harder rapid open feel ok.
I know, but i have AFR sniffer in tailpipe, so its delayded, unusable on idle reving.
But i realized opposite, i removed all my touches(during trial-error method) from async accel tables, and lowered normal accel table upt to 1/3 of original value at 500+1000 rpm. Its much better, not the best, but can be live with.
I tried to make it best as much as possible, async mutliplier VS tps delta have influence, but i dont understand the "TPS delta" axis( 0% to 12.5% ). I dont know on which trottle moves where in table may i adjust. On low but rapid throttle opening still little hicups, on harder rapid open feel ok.
But i realized opposite, i removed all my touches(during trial-error method) from async accel tables, and lowered normal accel table upt to 1/3 of original value at 500+1000 rpm. Its much better, not the best, but can be live with.
I tried to make it best as much as possible, async mutliplier VS tps delta have influence, but i dont understand the "TPS delta" axis( 0% to 12.5% ). I dont know on which trottle moves where in table may i adjust. On low but rapid throttle opening still little hicups, on harder rapid open feel ok.
The TPS Delta axis measures how fast you open the throttle. If you are adding too much fuel on low but rapid throttle openings, reduce the values in the lower end of the table (between 0% and 9.4%).
Newbie
Joined: May 2017
Posts: 20
Likes: 1
From: curitiba, pr, brazil
I know, but i have AFR sniffer in tailpipe, so its delayded, unusable on idle reving.
But i realized opposite, i removed all my touches(during trial-error method) from async accel tables, and lowered normal accel table upt to 1/3 of original value at 500+1000 rpm. Its much better, not the best, but can be live with.
I tried to make it best as much as possible, async mutliplier VS tps delta have influence, but i dont understand the "TPS delta" axis( 0% to 12.5% ). I dont know on which trottle moves where in table may i adjust. On low but rapid throttle opening still little hicups, on harder rapid open feel ok.
But i realized opposite, i removed all my touches(during trial-error method) from async accel tables, and lowered normal accel table upt to 1/3 of original value at 500+1000 rpm. Its much better, not the best, but can be live with.
I tried to make it best as much as possible, async mutliplier VS tps delta have influence, but i dont understand the "TPS delta" axis( 0% to 12.5% ). I dont know on which trottle moves where in table may i adjust. On low but rapid throttle opening still little hicups, on harder rapid open feel ok.
Thanks!
Thread
Thread Starter
Forum
Replies
Last Post
Charlie_B
ECU Flash
10
Apr 27, 2009 09:52 AM
mrfred
ECU Flash
33
Apr 1, 2009 05:00 PM