Hello all,
I own a 1976 Datsun 280z. A few weeks ago I finally finished installing and tuning Megasquirt (I believe MSII). Anyhow for the past couple of weeks I've had a leaning issue on restart. That being, I start the car when its cold and it runs perfectly normal. (I have an Wideband o2 and it reads high 13's at idle) I turn the car off to go do something (go into a store for example) when I return and restart the car it runs really really lean (AFR reads 18's to 19's at idle). If I let it sit for a while it will richen up a bit but it never returns to what runs at at first start up. (by that I mean it'll idle in the low 15's) Am I missing something or not tune something correctly? Any help?
Thanks all
Jan
An issue
Moderators: jsmcortina, muythaibxr
Re: An issue
The IAT is heatsoaking. The MAT correction table needs some tweaking.
95 Dakota, 5.2, 5 speed, 4x2, HX40, 12PSI, MS3X, 42lb Bosch Design 3 Injectors, AEM UEGO.
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racingmini_mtl
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Re: An issue
You also want to make sure your injector dead time is set correctly. That will exacerbate the heat soak problem.
Jean
Jean
Re: An issue
Could you elaborate on dead time? I'm on a bit of a learning curve as I've only owned this for about a month now. It does sound like heat soak is what's going on.
Jan
Jan
racingmini_mtl wrote:You also want to make sure your injector dead time is set correctly. That will exacerbate the heat soak problem.
Jean