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Car dies after foot off accelerator
Posted: Sun May 14, 2006 12:12 pm
by arnold
MS1 V2.2, MT 2.25 code ?? I dunno, didn't change it
The engine is not running perfect yet, but the car is driveabke. It is a supercharged Austin Healey Sprite (A-engien as in Mini). When I rev the engine a bit and take my foot off the pedal, the car dies. This ALWAYS happens (warm or cold), which settings I have to change for that?? What causes this? Decelelartion settings??
Posted: Sun May 14, 2006 1:15 pm
by boost junkie
Looking at a datalog will help figure out whats going wrong. Cature one and post it up here along with your MSQ file. Also need to know what firmware you are using.
Posted: Sun May 14, 2006 10:59 pm
by arnold
Where do I find what code have? I never changed it...
One of the latest msq's attached, and a datalog (sorry large one, i necessary I can make one only of the 'dying')
Arnold
Posted: Mon May 15, 2006 11:34 am
by arnold
maybe this graph makes it more clear. It happens when I am just reving the car witout driving it.... pretty annoying
Posted: Mon May 15, 2006 2:13 pm
by fiat132
same thing happens to me but only when its cold and i try to accelerate.
Posted: Tue May 16, 2006 6:21 am
by arnold
Hi, mine also more when it cold. Maybe this is caused by the auxiliary Bosch valve
It should close after a while.... I checked it really does close by heating it. But does this one close also when the housing is not warm enough? In my case it byepasses the throttle, so the vacuum is less
Posted: Thu May 18, 2006 5:05 am
by arnold
Anyone?
Posted: Sun May 21, 2006 4:46 am
by arnold
Well I have an other graph here, what could cause the rpm fall back all the way to cranking status or even die when I take the foot off the accelerator while revving in neutral. VERY annoying amd I don't know how to tackle it
Posted: Sun May 21, 2006 11:13 pm
by arnold
No one?
Posted: Mon May 22, 2006 12:27 am
by MegaScott
man, I forgot just how simple the old Megasquirt BG code is.
Have you tuned your idle bins properly? try richening up the idle bins a bit. Also maybe you can try to give it some decel enrichment right now you have it set to 100, try going to 125 and see of that helps.
You might want to upgrade to the MSnS-extra code, even if you aren't controlling spark there's alot of advanced features in that code that can help you out since you have a Wideband. Even if you don't use any extra features, you still get 12x12 tables, AFR tables, Better accell enrichment controls, the list goes on.
http://megasquirt.sourceforge.net/extra/