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Summary of change:
I am trying to specify a pnp system for my 1989 Porsche 964 Carrera 4 ---- The car as it is 25/06/2014 '''Mechanical''' *3.6L *6 cylinder *Upgraded "cup" cam of unknown lift and duration *Decat pipe *Permanent 4WD with centre and rear active differentials '''Management''' *55pin Motronic *Twin spark *Twin distributor *Twin coil (not coilpack or cop) *Standard ~230cc high impedance injectors *2 wire style Bosch ISV *Intake "resonance flap", vacuum actuator, electrically activated *Carbon canister vacuum switch '''Sensors''' *VR crank trigger on flywheel 60-2, missing tooth is 84 degrees BTDC *Hall sensor in distributor *4WD wheel sensor on rear diff, Hall *2x ABS wheel sensors *Cylinder head temperature sensor (NTC) *2 knock sensors *Narrowband O2 is fitted to most models, but this car had a factory option selected to remove this *Standard AFM (Flap style) *AIT (NTC type inside AFM) *Altitude potentiometer *Standard idle and wot switch (no analog TPS) ---- '''PLAN''' *To begin with I will keep the twin coils and distributors *Fit an analog/potentiometer TPS *Remove AFM and add a separate MAT. *Add wideband 02 *Convert to Speed Density (MAP) operation *Test idle and review if AplhaN+Map compensation would be better ---- '''Questions''' Continued operation of HVAC (this car does not have AC) Continued operation of ODB for ABS and 4WD diagnosis and testing Operation of "central informer" check engine light ---- '''References''' pin out here [http://site.ecudoctors.com/tech-data/Porsche_964/Pinout_964_0261200450.jpg PinOutImage] and here: MembersPage/PeepPaadam/PorscheCarreraTwo further information (some for 993 specifically) MembersPage/PeepPaadam/PorscheCarrera
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