engine running rough and loss of power

[sho.3.point.0h]

Hi,

I have a 92 SHO and lately it has been running like shit. It has no power whatsoever most of the time and it feels as if the secondary butterflies dont open at all (from the intake noise i know they do open, just no oomph)

Also when idling a lot of times the rpm go nuts ... it starts somewhere around 1200 drops to 800, and keeps on overcorrecting and eventualy dies (over correcting, from 800 to 1300 to 500 to 1350 to .. dead)

I have changed just about all sensors, Oxy (both), maf, map, oilpressure sending unit (was dripping on an oxy), cleaned TB, intake, etc etc.

Any ideas ? .. I'm at a loss here ... I forgot the codes it gave but they all pointed to an air issue, and when brought to a friends shop it showed to run lean.

 

[sdpatt]

The oscillating idle sounds like a misbehaving idle air control valve. Either clean or replace. For the driveablility problems, you've got to get the codes. You can replace all the sensors except the one that's failed and still not correct the problem. The codes point right to the cause. Help us help you. Read the codes. Please.

http://www.dalidesign.com/hbook/eectest.html

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