Cadillac: 85 Deville poor idle/stall, throttle plate, fuel fire


Question
I used to be a Cadillac Tech 1997-2000. Checked codes (E24)x2, (e52)x1, (f41)x1.  Cleared codes & rechecked after running engine a few minuets (F41)x1, (F.F.41)x1. I have air/fuel/fire, engine runs well when throttle is opened manually but when rpm's settle engine stumbles and stalls. I suspect ISC or MAP sensor failure but do not have manual to determine what codes I'm getting.

Answer
EE24 = speed sensor circuit problem. Effects the VCC overdrive clutch and cruise control operation.

E52 = battery was disconnected in the past.

FF41 = Cooling fans problem.

E-mail me at: onlineautohelp@msn.com and I can provide the test procedures and pictures to fix these problems.


FOLLOWUP: Clean the throttle bore and the throttle plate as it gets a black gummy residue buildup and won't let the throttle plate close all the way.