Will, Code 51, per my '92 FSM, indicates "O2 sensor signal stays lean"
and/or "Adaptive memory at rich limit". Either of these conditions will
cause the engine to run rich, indicated by the black smoke out your
tailpipe. Did you get the hose from the map sensor reconnected when you
changed it?
I'd suggest first disconnecting the battery to reset the PCM. If that
doesn't help it appears you need a new O2 sensor.
HTH,
RayB
http://www.dragtruk.com/ENTRIES/20KM1FD2KWBP.html
> -----Original Message-----
> From: owner-dakota-truck@bent.twistedbits.net
> [mailto:owner-dakota-truck@bent.twistedbits.net]On Behalf Of will
> Truck dead in driveway. Situation: Truck idles in park
> for a minute or two. Reasonably steady idle, except
> just faintly in background can detect slight loping.
> Then suddenly AIS starts whistling air like jet engine
> and dark black stuff shoots out tailpipe, spattering
> driveway. I shut truck off at this point. Start up
> again same thing. Truck will not rev past
> 2000-2500rmp. If I try there's a loud moaning from
> engine compartment and engine tries to die, sometimes
> succeeding. High-pitch whistling from ais.
>
> No leaks under truck. New egr, map, ais. I replaced
> ais and egr valve/transducer just today because pintle
> on old ais was stuck fully open at 1 1/4" and old egr
> transducer had a melted lower tube that connects by
> hose to lower egr valve body. Throttle body clean. ONe
> funny thing...truck was starting like it had new
> battery. Then went to start it again and nothing. No
> lights. No buzzer. No radio. Battery appears dead. And
> i had it fully charged at Autozone about 3 months ago.
> Liquid inside @7/8 full. LIght corrosion on battery
> tray. The only codes thrown are 12 and 51. Engine not
> overheating according to gauge. But I did think that
> the engine hoses on top to block felt too hot for only
> running a couple of minutes at a time in the driveway.
> Coolant level ok.
>
> I tried backing it up and driving forward up the
> driveway. Tranny engaged, engine revved a bit but no
> power. Barely made it 20 feet on level ground. Engine
> sounds "hollow", if that makes sense.
>
> Any ideas anyone? I live in sticks about 10 miles from
> any town and need to get on road. Neighbor is a
> mechanic but not able to help right now. Thank you.
>
> Will
> 92 Dak 318 2wd
>
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This archive was generated by hypermail 2b29 : Fri Feb 06 2004 - 11:46:00 EST