the biggest challenge
is seeing if its obd1 or 2
and what dutycycle mode the DLC uses. (harder) much harder.
THE DLC on many old suzuki's used a special meter that runs a non standard current mode to test this.
the later its a voltage mimic, mode pin, converts duty to a voltage from 0 to battery voltage., where 7v equals 50% duty hot.
what i uses is a meter that measures the ISC directly, and scales duty in the real world, 200 hz signal. (this automotive DMM has a mode called duty)
if the duty is way off, say the bleed screw is set way off, then the cold start will race, if the screw is too far CCW.
as seen here
this is just very simple air bleed. it is common to be set wrong, when a mech. finds idle speed wrong, its gets played with. (wrongly)
http://www.fixkick.com/IDLE-AIR/Slide_Sh...ge_31.html
what it does, is puts the ISC in the center of its range.
steps. i use are.
1: make sure isc does not leak, unplugged elect conn.
2: make sure TV does not leak a drop of air. it's 99.9% closed, (the no touch screw, not touched,. LOL)
3: no vacuum leaks. even the brake booster can leak and causes problems,. (i dont think you do)
4: at this time the only air flowing cold engine, are IAC , and bleed .
5: start engine, get it hot and IAC closes and only air is ISC (modulated no) and bleed
6: make sure idle is at 800.
spark timing is set to spec. (using the freeze pin 4(blu-red) on the DLC) and idle switch is closed (pin2) and at 0v...never 5v at idle.
7: connect duty meter up to DLC . (or scope, to ISC direct, or duty meter to ISC direct) (there are 3 or 4 ways to connect, one works)
8: turn bleed for 50% duty,
9: done
on our 1998 dlc pin 6 (purple) reads 7v at 50% , the older cars, this pin is useless due to custom Suzuki only meter works, in current mode.
http://www.fixkick.com/IDLE-AIR/dutycycl...html#Begin
the other hard part is finding the DLC, ours have 2. that year.
the one under hood, can be in 3 places.. (most are 6pins)
R/F head light shell (our 98 is here) has a black rubber cap to protect unused pins.
front of battery
or left front strut tower.
with duty set correct
there will be less air flowing on cold starts. because the bleed adds to cold air starts.
if not,? the IAC is bad. (now runs too much air cold)
is seeing if its obd1 or 2
and what dutycycle mode the DLC uses. (harder) much harder.
THE DLC on many old suzuki's used a special meter that runs a non standard current mode to test this.
the later its a voltage mimic, mode pin, converts duty to a voltage from 0 to battery voltage., where 7v equals 50% duty hot.
what i uses is a meter that measures the ISC directly, and scales duty in the real world, 200 hz signal. (this automotive DMM has a mode called duty)
if the duty is way off, say the bleed screw is set way off, then the cold start will race, if the screw is too far CCW.
as seen here
this is just very simple air bleed. it is common to be set wrong, when a mech. finds idle speed wrong, its gets played with. (wrongly)
http://www.fixkick.com/IDLE-AIR/Slide_Sh...ge_31.html
what it does, is puts the ISC in the center of its range.
steps. i use are.
1: make sure isc does not leak, unplugged elect conn.
2: make sure TV does not leak a drop of air. it's 99.9% closed, (the no touch screw, not touched,. LOL)
3: no vacuum leaks. even the brake booster can leak and causes problems,. (i dont think you do)
4: at this time the only air flowing cold engine, are IAC , and bleed .
5: start engine, get it hot and IAC closes and only air is ISC (modulated no) and bleed
6: make sure idle is at 800.
spark timing is set to spec. (using the freeze pin 4(blu-red) on the DLC) and idle switch is closed (pin2) and at 0v...never 5v at idle.
7: connect duty meter up to DLC . (or scope, to ISC direct, or duty meter to ISC direct) (there are 3 or 4 ways to connect, one works)
8: turn bleed for 50% duty,
9: done
on our 1998 dlc pin 6 (purple) reads 7v at 50% , the older cars, this pin is useless due to custom Suzuki only meter works, in current mode.
http://www.fixkick.com/IDLE-AIR/dutycycl...html#Begin
the other hard part is finding the DLC, ours have 2. that year.
the one under hood, can be in 3 places.. (most are 6pins)
R/F head light shell (our 98 is here) has a black rubber cap to protect unused pins.
front of battery
or left front strut tower.
with duty set correct
there will be less air flowing on cold starts. because the bleed adds to cold air starts.
if not,? the IAC is bad. (now runs too much air cold)
http://www.fixkick.com