Join Date: Jan 2012
Location: Lakeland, Florida, USA
Greetings all.My brother just bought ana 86 ASPY with the preverbial erratic idle and slow throttle response at lower RPM's. I am trying to resolve a problem for him. The computer indicates a bad TPS with W steady and 0 + 1 flashing.The FUEL SYSTEM light is ON STEADY . I have read many forum subject post regarding this matter and still cant seem to isolate the cause after throwing many parts and hours at the problem. I am seeking wisdom, guidance and experience from you wingers out there who have been down this same road. This is a long post so bear with me.
PARTS REPLACED OR SUBSTITUTED:
TPS sensorreplaced with a used sensor thatchecked to specs. Reference voltage and return Voltages back to the computer were good. Smooth resistance operation and voltage increase/decrease were smooth and within specs. 3 pin connector male and female replaced. DISCONNECTED TPS 3 PIN CONNECTOR AND STILL GET SAME ECU CODE
FUEL PRESSURE REGULATOR NEW ONE ( AFTER MARKETPR31 )
pbl/pbr swapped with each other and a pair of used ones that I purchased. Vaccum lines to the sensors were replaced.
gl/gr replaced with a new set
NS sensor replaced with NEW / Modified from 85 LTD
ECU SWAPPED: Both ECU's display the same code when the ignition is FIRST switched to ON. Engine NOT Running.
NEW NON-ETHANOL FUEL
Cone filter cleaned at fuel pump inlet
Previous owner had the throttle bodies sync'ed, Modified TPS installed ( I replaced with a used one ) fuel filter replaced, New orings for injector 1, cleaned and tested all injectors, greased all electrical connections on injection harness , compression checked the bike, all GOOD, replaced all exhaust gaskets.
I suspect an electrical signal problem somewhere in the injection harness as I get the code on both ECU's when the key is first turned on but not sure where to go from here. If the bike were running and pressures and flows were involved with the code displayed I obviously would have more to troubleshoot. Talk to me Honda SEI experts! What say ye? Thank you all