91 chev camaro code 43 changed computer,prom ,distributor,ignition module ,knock sensor, knock sensor pigtailvehicle seems to drop ignition out intermittently off idle about 1750 rpmwiring seems ok
Year : 1991
Make : Chevrolet
Model : camaro
Engine : 3.1
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found computer replaced found new knock sensor and pigtail
found new memcal found voltage at 5v disconeted and 2.3
v connected found wiring ok found igntion not cousing drop out
vehicl reads 4% co off idle and intregator goes low drops to 100 and causes
vehicle to run like a engine missfire only code is 43
comes on as soon as vehicle is started
The code 43 issue, did you replace the computer and memcal with a new dealer part with the current updates? Have all the power and grounds been checked to the computer?
The 4 percent co, what are the fuel pressures at? Disconnect the evap purge line and see if the readings stay the same.
dealer parts no longer available
all power and grounds ok
fuel pressure ok 30-42
o2 sensor replaced
evap purge disconnected while testing no change
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2 bad injectors caused this problem