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PostPosted: Wed Jul 20, 2005 3:52 am 
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Location: Omaha Ne. U.S.A.
I took the car to work today,and as I was driving home,I stopped,and the engine started to surge again(It has happened on occasion,it seems,once at the track last year)It almost feels like someone is kinda pushing on the car.I know my idle is screwed up (Bigger tb,no idle adj.) But it has happened without the bigger tb,and is getting annoying.I did a search,and Nothing in my ballpark.Heres what has been done/replaced;
Newer Fuel Filter,
Flushed/Redone coolant on Sunday,
New im/tb(but it has happened before the swap as well),
Newer o2 sensor(I have Tom's chip,so thats out)
I have adjusted again and again the tps,and It is at Infinity with the proper gauge feelers,
Newer plugs(not that old)
Newer cap/rotor(less than a year old)
Newer plug wires,
Not sure about vacuum,
Maf is not the original,,the original was "cleaned"with alcohol,and ruined,so i bought another one,,maybe that could be it??In reality,some goofy problems started with the maf swap.
I cant rememeber what other stuff at this point was replaced,BUT Could a maf sensor cause a really irratic/surging idle?? I had NO luck really on that,,everyone says"TPS"but i dont think thats it. And another Q,what can a person do about a goofy idle from a tb swap??From what I understood,live with it.It is a lower idle,almost lopes,and I cannot set idle,just stop screw(which raises the idle),and resetting the tps ,it always goes back down to the low idle.If i dont reset the tps,i'd be fine..Right now it idles ~ (give or take)600 rpm MAYBE 700 MAX.BUT this is not causing the surge,,remember it happened before the swap,,it is just 2 different questions.And YES I did a search.

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"One Of Three ORIGINAL (CERTIFIED) LNLC Co-Founders"
1991 Suzuki Swift GT.
1994 Suzuki Swift GT.
If my Swift was as fast as Tg or m's car I'd be famous...
My car is a trailer queen 'cause it's too slow to merge safely into traffic


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PostPosted: Wed Jul 20, 2005 10:15 am 
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:huh: interesting..
i have seen a coolant sensor cause a surging idle. i have seen a tps cause a surging idle. and i have seen a bad alt cause a surging idle.(actually my alt tab, that holds the plug in, is broke so it comes unplugged and after a bit the idle will wander)

how about the tps sensor set too sensitive, and sometimes it doesnt see "idle" when you release the pedal??or bad bushings in the tb so the blades dont always close fully. or an intermittent sensor probem,with either the coolant or tb sensor. also if the TB is set too high the computer will try to adjust the idle with fuel,so maybe a reading off the o2 with a DVOM would help out.

the hard part will be, being that it is an intermittent problem,you will need to be testing when it is surging, to find anything wrong. :evil:

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PostPosted: Thu Jul 21, 2005 2:15 am 
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I will try that ,so Karma Points goes to you. Anyone else with ideas?? I have read the same(Coolant sensor,tps,etc,)but what exactly does the coolant sensor track?The level?The temp?

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"One Of Three ORIGINAL (CERTIFIED) LNLC Co-Founders"
1991 Suzuki Swift GT.
1994 Suzuki Swift GT.
If my Swift was as fast as Tg or m's car I'd be famous...
My car is a trailer queen 'cause it's too slow to merge safely into traffic


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PostPosted: Thu Jul 21, 2005 9:08 am 
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Location: Georgetown, Guyana
Temperature


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PostPosted: Fri Jul 22, 2005 2:23 am 
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Thanks,and Karma Point. Anyone else know any tricky sensors that can do this??What about the maf??

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"One Of Three ORIGINAL (CERTIFIED) LNLC Co-Founders"
1991 Suzuki Swift GT.
1994 Suzuki Swift GT.
If my Swift was as fast as Tg or m's car I'd be famous...
My car is a trailer queen 'cause it's too slow to merge safely into traffic


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PostPosted: Fri Jul 22, 2005 10:17 pm 
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Location: US North Carolina
I think its your ignition coil, or the igniter thingy. But mostly the coil.

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PostPosted: Fri Jul 22, 2005 10:37 pm 
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Location: Dallas, Texas
mine surges, but thats because the tps and tb idle screw arnt set completely perfect. its your tps/idle screw mine got a lot better when i adjusted my tps

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PostPosted: Sun Jul 24, 2005 12:48 am 
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I've been trying to track down an intermittent stumbling issue with my own vehicle. I suspect I disturbed some old decrepid wiring when I reinstalled my MSD. I've already resoldered the MAF plug connector to get rid of corrosion on the crimp terminals, although now I'm probable going to replace the whole MAF wiring right back to the ECU. My TPS might be at fault too, but I can't check it due to some crackhead who stole my multimeter... :evil:

Regarding TPS calibration, Suzuki issued a TSB on one of the calibration figures:
Quote:
TSB # TS4-1606082
correction of TPS specification for idle setting
impedance should read 0 - 2 K Ω (ohms)

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PostPosted: Sun Jul 24, 2005 4:20 am 
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I have done the same (One of the wires were in a shady-repaired"Crimp"condition,) But I'll check around the maf wiring(I figured it shouldve been ok after I fixed it,with Heat-shink and Electrical tape after soldering) , and about the calibration of the tps,Wasnt it supposed to read infinity with the correct gauge feelers? Now how can I adjust from 0-2k Ohms,,i mean ugg I cant explain,I am just confused :thwack: :drunk: Karma points given to everyone who has posted with thoughts :)

_________________
"One Of Three ORIGINAL (CERTIFIED) LNLC Co-Founders"
1991 Suzuki Swift GT.
1994 Suzuki Swift GT.
If my Swift was as fast as Tg or m's car I'd be famous...
My car is a trailer queen 'cause it's too slow to merge safely into traffic


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PostPosted: Sun Jul 24, 2005 9:22 am 
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There's actually five different resistance values you're supposed to check when calibrating a TPS. The revision in the TSB is concerning the resistance between pins C - B with the throttle plate in the IDLE position (fully closed with no feeler gauges between the stop screw). In the original factory literature the resistance is stated as being 0 - 500 Ω (ohms). This was later revised in TSB # TS4-1606082 to 0 - 2000 Ω (ohms). This what I drew up when I was actually staring at the engine with tools:
Image
... and no I can't always read my own writing... :ez_l0l:

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jaguar,vettes&sprints wrote:
...can you inlighten me about lihtan's
( miracle pour hole)
maybe a picture Thanks


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PostPosted: Sat Nov 25, 2006 9:09 am 
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where is my idle ajustment screw ? i've looked all over, all i need to do is increase my idle about 200 rpms but i can't find the screw ??? please help, pics if you can, thanks !

joe

pjanebjane@aol.com

:roll: :shock: :roll:


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PostPosted: Sat Nov 25, 2006 1:06 pm 
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Location: NorCal, USA
joemetro2000 wrote:
where is my idle ajustment screw ? i've looked all over, all i need to do is increase my idle about 200 rpms but i can't find the screw ??? please help, pics if you can, thanks !

joe

pjanebjane@aol.com

:roll: :shock: :roll:


Hello joe, and welcome to the forum--

Please state your problem,
and also the year/make/model/engine/trans/accessories and mileage of your car. :)


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