EEC IV full rich
Gentlemen, I am new here, looking for some help w/ 5.0 EEC IV running full rich. ER codes give me a 42 & 92, which seem to confirm the obvious. Only other unexpected code is KOEO code 85 canister purge. Fuel pressure 38 psig. Engine starts fine cold, then hits closed loop and the fumigation begins. Engine new rebuilt, mechanically OK. Fuel injection system cleaned, injectors cleaned and rebiult w/ RJM service kit. No codes indicate ECT, ACT, TPS, MAP or MAF problem. ACT in mainfold wrapped heavily in teflon tape. Is a good sensor ground required here (If yes, then ECM might get a full 5 v, which according to Probst corresponds to about 0 degrees C)? Is pin 46 sig return a sensor ground or 5 volt signal to sensors? Don't have ECM number, but came from SVO mass air conversion kit. AOD auto, ECM corect for auto. Harness is 86, transplanted in to Lincoln Mark VII. All EEC connections and wiring seem proper according to schemetics. HEGOs heat up fine and are new. Engine runs fine, just way rich. Did have a nasty faulty alternator plug which burned out diodes in alternator and fried a couple TFI modules, but that has been corrected, and everything seems right now, except for rich condition. EGR blocked at manifold. No TAB, TAD or air pump (did get codes on them, but expected). Timing at 14 degrees. 180 degree tstat.
Any ideas were to start when I go back at it again this eve?
- Jim .....
PS - Will be back after lunch break.