pgmfi.org

hi all

i got a 94' Civic with a crome chipped p28 and built d16z6 motor and dsm injectors with resistor box

before some days it started to run lean on acceleration (very lean, wideband reads 16+, power loss
, exhaust header gets HOT - hotter than ever before). on very light cruise and idle it is okay, but as soon i just get
on the gas only a little it gets lean, and eventually bogs with afrs of 18+

what i replaced/checked :
fuel pump (also measured fuel pressure)
fuel filter
fuel damper
took out my injectors, bridged the resistor box, put the stock ones in and a stock programm. no change.
even tried it with the external rom disabled, no change.
replaced alternator
measured ground and voltage multiple time everywhere (ecu, injectors), all good, no ground voltage difference
and ecu sees full 13.8 volts - what i read on my multimeter.
resistance for the injectors is also good, no shorts from the injectors to the ecu
viewed all datalogging parameters - all good (replaced my MAP just to test - did not get better)...
hooked up injector output to a oszilloscope - can see the ecu manages to get the outputs to 0 volt
(unfortunately i cant see while driving - oszilloscope is 220 volt powered so i cant take it with me;) )
even wired ecu and injectors directly to my battery. nothing.

also tried unplugging injectors at a time, regardless which is unplugged idle sinks the same amount.


so, i begin to think my ecu is broken. anybody has a schematics of a typical obd1 ecu?
anybody ANY ideas what i could test further? maybe bad cap? i already tried a big cap just
for buffering the power source before the ecu, didnt help


greetings
alex

is the fpr working correctly?? vac lines clear?

i forgot to mention:

changed the fpr for a known good one
checked for leaks
checked the vac lines with pressure

(have been testing so much things, cant remember it all at once)

have u checked ur timing