Originally Posted by jr's3800
Originally Posted by willwren
Ok, on the way home from work tonight using the scantool:
Headlights and foglights on, stereo off. Radar off.
Volts on idle: 13.4
Volts on Decelleration: 13.6
Volts on cruise: 13.4
Volts on ACCELLERATION @ 2500-3000 rpms: 13.0
Is this my problem? Is the ignition system that sensitive to a weak alternator? I'm assuming IF this is what'* causing misfires (or just weak fires, since the PCM isn't reporting a misfire) my plugs are probably fouling also.
Check your plugs first..... You might have an unhappy camper... Your autozone special is functioning for now... I however don't like how its loosing voltage on acceleration.... Usually it'll be a bit higher... but the unit falls in the proper operating range... I have the same alt you do on my 91 bonneville and its usually at 13.5 to 14v for just abotu all driving situations... You may even have a clogged or dirty fuel injector... Does the miss happen a lot of just every now and again under acceleration? Check the plugs first and number them according to the cylinder number they came out of and have a good look at all of them...
I'd buy a fouled plug before an injector. It smells rich when I get out of the car after a 'misfire' run. It'* a heavy miss. Feels like at least 1 or 2 cylinders missing at the same time. If I nurse it along under 2500 rpms, I don't get it at all. I'm not running lean, so I know it'* not fuel delivery related, and all my injectors were cleaned when I did the Eaton rebuild. Filter is fairly new too.
I'll have to pull and inspect plugs next I suppose. Might be a couple days before I have time.