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PostPosted: Fri May 15, 2009 9:54 am 
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Joined: Tue Apr 29, 2008 8:06 pm
Posts: 1445
Location: Atlanta GA 30052
didnt find an answer in Problems with idle and pulse
but it must be simple ! :lol:

after a steady cold start fast idle
it bounces from 1500 to 2000 to 1500 to 2000 ... at 1 sec interval
never really settles anywhere

if i apply gas it will bounce 3000 4000 3000 4000

it didnt do this before i removed it from the 94 to put in the 92. engine harness was left on. chassis harness was moved over.

i fixed one poor vac hose. no change.
i cleaned all connectors as i put together.
changed thermostat and timing belt.
:huh:

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looking for:
the time i mispent in my youth

daily driver: red 1991 Metro 3cyl 5sp, roof rack, 8 degree advance,
got 61 mpg combined on 14" tires but i prefer 12"

completed frame up restoration: black 1994 Swift GT 5sp -- like new ! 45mpg


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PostPosted: Fri May 15, 2009 10:05 am 
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Joined: Tue Mar 22, 2005 2:57 am
Posts: 280
Location: Edmonton
Your IAC (idle air control) is broked. There is 2 vacum lines + a little gadget on your intake manifold.

When idling, pinch both of the vacuum lines to the IAC, if the idle improves, your IAC is messed up.


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PostPosted: Fri May 15, 2009 11:29 am 
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Location: Atlanta GA 30052
thanks ehos, you were right.

good news:
it runs! and idles ok !

bad news:
1994 SUZUKI SWIFT GT 1.3L 1298cc 79cid L4 TBI (3) : Fuel/Air : Idle Air Control Valve
AIRTEX Part # 2H1449
* Non-stock item--shipping delayed up to 2 business days
$92.79 at Rock auto
$242. Borg Warner at local Oreilly and Advance
$90 Wells/Duralast 2 yr warranty at Autozone.

i suppose it has to have it ?


Attachments:
IdleAirControl1139.jpg
IdleAirControl1139.jpg [ 95.07 KIB | Viewed 1875 times ]

_________________
looking for:
the time i mispent in my youth

daily driver: red 1991 Metro 3cyl 5sp, roof rack, 8 degree advance,
got 61 mpg combined on 14" tires but i prefer 12"

completed frame up restoration: black 1994 Swift GT 5sp -- like new ! 45mpg
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PostPosted: Fri May 15, 2009 11:52 am 
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Joined: Tue Mar 22, 2005 2:57 am
Posts: 280
Location: Edmonton
Not really. You can just block off the vacuum lines :) Your results may vary, but try it first and you might save some money.


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PostPosted: Fri May 15, 2009 1:06 pm 
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Location: Atlanta GA 30052
it seemed weird on accelleration -- just 5 minutes around the block. could be the gas or who knows. i will do another test drive after i check the suspension etc .

NOT the same as any Hondas or Nissans. Honda Civic is over $400 :shock:

IAC is just for 89-94 GT.

_________________
looking for:
the time i mispent in my youth

daily driver: red 1991 Metro 3cyl 5sp, roof rack, 8 degree advance,
got 61 mpg combined on 14" tires but i prefer 12"

completed frame up restoration: black 1994 Swift GT 5sp -- like new ! 45mpg


Last edited by xrw44 on Sat May 16, 2009 11:20 pm, edited 1 time in total.

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PostPosted: Fri May 15, 2009 1:37 pm 
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Joined: Tue Mar 22, 2005 2:57 am
Posts: 280
Location: Edmonton
Are you getting a stumble off idle when you first try to take off?


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PostPosted: Fri May 15, 2009 2:23 pm 
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Location: Atlanta GA 30052
yes

_________________
looking for:
the time i mispent in my youth

daily driver: red 1991 Metro 3cyl 5sp, roof rack, 8 degree advance,
got 61 mpg combined on 14" tires but i prefer 12"

completed frame up restoration: black 1994 Swift GT 5sp -- like new ! 45mpg


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PostPosted: Fri May 15, 2009 5:23 pm 
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Joined: Wed Sep 13, 2006 4:19 pm
Posts: 234
Location: atlanta, georgia
I have never had the isc connected nor the fast idle valve and my car runs okay. check the idle adjustment screw on the throttle body. The one on the top not the set screw. Also double check for no vacuum leaks.


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PostPosted: Fri May 15, 2009 9:33 pm 
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Location: Atlanta GA 30052
i will keep looking at the old hoses. :(
some will crack underneath. :evil:

_________________
looking for:
the time i mispent in my youth

daily driver: red 1991 Metro 3cyl 5sp, roof rack, 8 degree advance,
got 61 mpg combined on 14" tires but i prefer 12"

completed frame up restoration: black 1994 Swift GT 5sp -- like new ! 45mpg


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 Profile  
 
PostPosted: Sun May 17, 2009 9:56 am 
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Joined: Tue Apr 29, 2008 8:06 pm
Posts: 1445
Location: Atlanta GA 30052
drove around for 10 min
runs good
just no attenuation/buffer when gas pedal ON/OFF
it jerks if i make a big change
thats with no idle adj valve


thanks for mentioning the throttle body idle adjustment screw. which one?

image_id: 16588

image_id: 16590

_________________
looking for:
the time i mispent in my youth

daily driver: red 1991 Metro 3cyl 5sp, roof rack, 8 degree advance,
got 61 mpg combined on 14" tires but i prefer 12"

completed frame up restoration: black 1994 Swift GT 5sp -- like new ! 45mpg


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 Profile  
 
PostPosted: Sun May 17, 2009 11:03 am 
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Joined: Wed Sep 13, 2006 4:19 pm
Posts: 234
Location: atlanta, georgia
The screw on the backside. there may be a small cap on it. Sould be a medium sized slotted screw. Loosen it to increase idle, and tighten to decrease idle.


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PostPosted: Sun May 17, 2009 11:09 am 
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Joined: Wed Sep 13, 2006 4:19 pm
Posts: 234
Location: atlanta, georgia
Do not adjust figure A it is the throttle stop screw. Figure B is the dashpot adjustment screw, but i don't know if it should be adjusted. Ckeck the FSM.


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PostPosted: Wed May 27, 2009 10:43 am 
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Joined: Tue Apr 29, 2008 8:06 pm
Posts: 1445
Location: Atlanta GA 30052
Dashpot made no difference to idle.

did all 8 tests on ISC -- passed
Lihtan/gti/Solenoid-Valve.pdf
with SAME ISC installed it now idles smooth -- even with lights on

Found the idle screw hiding under the hose ! :roll:
adjusted idle to 900 ( 1 complete turn clockwise)

so why
1. did the idle bounce?
2. did idle calm down when i disconnected ISC ?
not sure.
the hoses were correct, air tube to lower, upper to manifold.
i drove car 2 mi w/o ISC. (harsh)
i installed a good ALT but BAT was around 12.5v -- ok.
water hoses were off TB for days.
i bled out water hoses on back of intake with eng running -- saw no air but ... ?
i checked all air tubes for blockage -- none.
i put a hose clamp on 1/2" air hose just after the air meter. -- was a bit loose, um-metered air?

thats it.

like Bob Seger "solving mysteries without a clue!
Clueless.

_________________
looking for:
the time i mispent in my youth

daily driver: red 1991 Metro 3cyl 5sp, roof rack, 8 degree advance,
got 61 mpg combined on 14" tires but i prefer 12"

completed frame up restoration: black 1994 Swift GT 5sp -- like new ! 45mpg


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 Profile  
 
PostPosted: Wed May 27, 2009 11:29 am 
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Joined: Tue Mar 22, 2005 2:57 am
Posts: 280
Location: Edmonton
Maybe unrelated, but when have you had your fuel filter changed/checked?
How about MAF cleaned?


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PostPosted: Thu May 28, 2009 3:26 pm 
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Joined: Tue Apr 29, 2008 8:06 pm
Posts: 1445
Location: Atlanta GA 30052
how is the MAF cleaned?

_________________
looking for:
the time i mispent in my youth

daily driver: red 1991 Metro 3cyl 5sp, roof rack, 8 degree advance,
got 61 mpg combined on 14" tires but i prefer 12"

completed frame up restoration: black 1994 Swift GT 5sp -- like new ! 45mpg


Top
 Profile  
 
PostPosted: Wed Aug 12, 2009 6:39 pm 
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Joined: Tue Aug 11, 2009 5:03 pm
Posts: 31
Location: usa south dakota
Take your Idle air controler off and clean it with carb cleaner. they get sticky and your idle will bounce. Or leave it disconected and it will be fine too, but make sure you plug the vacuum lines


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PostPosted: Thu Oct 29, 2009 8:23 pm 
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Joined: Tue Oct 06, 2009 9:24 pm
Posts: 14
Location: Cleburne Texas
I have the same idle bounce...have been pulling my hair out on a 97 3cyl, 1.0l manual....just changed the electronic idle controller today (found one at a salvage yard), and it did nothing...same check engine light, same code, same idle bounce...1500-2000 every second. The only acception to this condition is when the AC is on. She humms nicely, however, has a very low pressure on the clutch and is almost unresponsive.


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PostPosted: Thu Oct 29, 2009 11:58 pm 
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Joined: Thu Jul 20, 2006 7:17 pm
Posts: 1408
Location: Alberta, Canada
Idle bounce/erratic up and down is almost always caused by to much air getting into the engine. The computer sees the idle go up due to more air than it thinks should be there, then it tries to drop the idle. I learned this on my old honda civic and have since applied it to Suzuki's, bmws, and many other vehicles. The beauty of many imports is that by turning down the air screw(never the throttle body throttle plate screw), you can drop the amount of air that is getting it and stop the fluctuation. This is usually covering up either a vacuum leak, or iac of some sort that is letting a bit to much air past. sometimes the component does need to be replaced but often it works just fine after without replacement.
On the metro 3cyl it is often caused by the wax pellet in the throttle body letting too much air by and unfortunately the newer models dont have an air screw to turn in. Seems to be common on the 89-92 automatics and generally needs a throttle body change to repair.

_________________
1995 Swift w/16V 4.39s, 3tech cam, Esteem t-body, Header, needs more.
1995 Gt Mustang "Boss Shinoda" package.
1999 F150 4x4 Supercharged
1967 Mustang 428 auto, never ending expensive project
1993 Civic si h22a, fell in my lap, couldn't resist!


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PostPosted: Mon Nov 02, 2009 10:27 pm 
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Joined: Tue Oct 06, 2009 9:24 pm
Posts: 14
Location: Cleburne Texas
Thanks for the input...I will try the IAC, tomorrow. Makes perfect sense.


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PostPosted: Wed Aug 10, 2016 12:18 pm 
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Joined: Wed Aug 10, 2016 12:14 pm
Posts: 1
Location: Itapecerica - MG - Brasil
Look at the power of iac, in my case is receiving only 6,5v .


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