Well trying to check static timing today noticed a few things.
Looks like I am running about 9.5 deg of advance which is ok as I boost spike well above 18 psi and run a safc2 which is supposed to advance the map a little.
> when I took more fuel out at idle with the safc timing was pulled by about 1 deg at about 1300 rpm when reducing fuel from -34% to -48% at 800 rpm so at low revs timing decreased not increased as people say. Well I guess the stock ecu doesnt like too much leaning at the warm day idle temps I had with my quick response celica air temp sensor?
> Next when the spark plug shorted out as my timing light connecteor was not insulated i noticed timing would surge to about 3 degs more advance around 13 deg intermitantly.
> Finally and most disturbing I thought I would see what happened with AC on ( ac fluid cold, engine warm. Well revs dropped the engine got rough and timing occilated quickly between 14 and 8 advance. This was with the diagnostic port bridged and in neutral so I hate to think how it would be with additional load in drive .
I have been thinking the manual ecu adds timing when the AC is on even though it loses torque on hills it generally seems more responsive with ac on. Any one know what might be happening to cause such dramatic changes in idle timing?
Looks like I am running about 9.5 deg of advance which is ok as I boost spike well above 18 psi and run a safc2 which is supposed to advance the map a little.
> when I took more fuel out at idle with the safc timing was pulled by about 1 deg at about 1300 rpm when reducing fuel from -34% to -48% at 800 rpm so at low revs timing decreased not increased as people say. Well I guess the stock ecu doesnt like too much leaning at the warm day idle temps I had with my quick response celica air temp sensor?
> Next when the spark plug shorted out as my timing light connecteor was not insulated i noticed timing would surge to about 3 degs more advance around 13 deg intermitantly.
> Finally and most disturbing I thought I would see what happened with AC on ( ac fluid cold, engine warm. Well revs dropped the engine got rough and timing occilated quickly between 14 and 8 advance. This was with the diagnostic port bridged and in neutral so I hate to think how it would be with additional load in drive .
I have been thinking the manual ecu adds timing when the AC is on even though it loses torque on hills it generally seems more responsive with ac on. Any one know what might be happening to cause such dramatic changes in idle timing?
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