Question about 1995 Nissan 240SX

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95 240sx with low idle speed hunting prblem

At low idle speed, idle hunts for a few seconds. adjusts itself...all is fine

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6ya6ya
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Posted on Jan 02, 2017

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mhamlin63
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SOURCE: 1992 maxima. 2 or 3

Try fuel injector cleaner, and if it does it still, tune up or change injectors.

Posted on Jul 25, 2009

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saailer
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SOURCE: constant misfire,(hunting)

Hello! I suspect that the vehicle has a defective Throttle Position Sensor (TPS)...It is mounted on the throttle body...You can locate it by its wire colors...Black, White, and Pink/Black...If you have knowledge of a voltmeter, you can test it...Locate the sensor...push the end of a paper clip into the rear of the connector on the Black wire and another into the White wire...
With the car at idle put the negative meter probe on the Black and the positive on the White...Set the scale on the meter to read 1-5 volts...At idle you should read less than 1 volt...Have someone slowly increase engine speed...The voltage should rise to 4 volts without jumping, or erratic needle movement...If the voltage skips, jumps, or acts erratic the TPS is defective...

Guru.........saailer

Posted on Mar 12, 2010

  • 1 Answer

SOURCE: nissan micra k12. not idling properly, low power,

HI, I GOT NISSAN MICRA 1.2 SE 2005 PLATE ONLY DONE 59000 MILES. MISSING! I HAVE CHANGED COIL PACKS, CAMSHAFT SENSOR, TIMMING CHAIN, STILL THE SAME PROBLEM. I HAVE ALREADY SPENT 1000.00 POUNDS. IS THERE ANYONE WITH SAME PROBLEM?

Posted on May 12, 2011

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Suzuki super carry 1.3 engine revs high low high low high low when clutch is put down engine revs very high


wow no year car stated nor a country x10 worse.
welcome to our USA forum!
the country with ZERO, carry cars. not a one. here
and due to that , no books here nor coverage at mitchells. either.
That is a G13 engine, (not m13) is my 1st guess.
Most Suzuki's with tiny engine and run a map sensors, not MAF
so is called SPeed Density system.

if yes, the that means ALL vacuum leaks cause fast idle.,
armed with that juicy fact, we know why it races.
you never said and actual RPM so no Tachometer?
only 2 causes. a huge vacuum leak
or unlikely the ISC stuck wide open with gunk inside, (clean it?)
ISC is idle speed control.
old suzuki's had man killler ISC software, my 91 did it.
and all others like it........
it would hunt idle like mad with any vacuum leak.(of any kind)
today this is very *******, this mode. (hunt)
toyata cost them $1billion in fines for this same deal.

but Clutch drivers have no problems with idle hunt, "skills"
what year/country.?
please showa photo of engine. ?
and win. a win/win
you win and I win not guessing all that.

fact 2 , is that that hunt tells me the ISC is moving fast.
so is not stuck. (99% says R3PO)
unplug ISC see the hunt end? sure.
the ECU has lost its wits. from..... this....
it sees a massive air leak (vacuum map readings ) and then (dumbblly ) hunts it like mad, (bad Firmware code) but real.
i can demo this is seconds hood up.
causes?
1: vacuum hose fell off.
2: same hose cracked.
3: brake booster diaphragm cracked, sucking air big time)
4: lots more,. even gunk under throttle plate blocking it open.
and more. lots more. can cause lots of vacuum leaks.

Dec 16, 2016 | Suzuki Cars & Trucks

1 Answer

My son's 1997 Baleno GXL 16B idle is ok when cold but when hot idles at 2000 then backs to 1500 to 1000 and back to 1500 then 1000 ??


this is a USA form and we dont have Balenos,
but do have lots of G16b (16valves)
that is called hot idle speed hut, its a software bug, in the ECU.
this same bug cost toyota 2bill bucks in fines. but not suzuki nobody cares. on them.
a barn find car, done many, too many.
That sure can be many things but in order its clear.
THE ISC is failing , in fact its doing the hunting, if you unplug its 2wires, it stops hunting.
the cause is really air leaks, the ECU is programmed to hold hot idle at 800, rpm , if it cant. it ILLEGALLY hunts it.
a lreal car, would just send the valve closed command over and over and not hunt it, as hunting can kill, drivers with bad skills.
First car i saw this on was a 91, Vitrara, Sidekick. G16a.
then a 96 G16b,
you have a vacuum leak.
that is the cause.
and I bet lots more ... for sure, last one like that I did had 15 majors.

Sep 17, 2016 | Suzuki Baleno Cars & Trucks

1 Answer

I have a 1995 suzuki sidekick that is revving hi then low while in nuetral also when driving now it revvs up very high while sitting at a stoplight


at what RPM?,sure the 2wd has no tachometer,

Sidekick, with what engine? sure 5speed and 2wd,
but what engine.?
in 1995 they (last year this) 2 engines
the 8v and 16valve,
both, night and day different, EFI.
TBI and MPI injected, 8v is black top, 16v says 16 valves on top.
but both engines, will fail ISC controls like that if there are problems.(idle speed controls)
the surging (hunting) is one of 2 things.
  1. (too lean, or air leaks)
  2. or ISC lost control)
the ECU on the car will in fact hunt the ISC if it can not attain
800 RPM hot IDLE, that is its JOB, to do that, endlessly.
in fact 200 times a second.!
but is not working. (this control, its out of control for sure)
to find this can be easy or hard.? (luck and true causes)
depends on true cause.
I cant do both engines here, be like 10 pages.
The 8v engine races with all air leaks. and hunts. (races)
the 16v goes lean with all air leaks, (air density system is unique)
and goes slower, RPM and may hunt. no RPM stated so cant wax smarter...sorry.

so its a dirty ISC? cant close fully, ? clean it? first.
the 8v has air leaks. caused by vast reasons.
cracked hoses. leaking diaphragms, even the brake booster can leak. lots of leakage patch possible
or some one fiddled the idle air bleed screw making it fail.
try closing that valve (screw) turn it CW directly clock wise.

this page covers both systems.

http://www.fixkick.com/fresh-air/idle-air-supply.html


this ISC cleans just like the EGR that leaks.
egr leaking cause, low RPm and it too, can make the ISC go nuts.
so, but no RPM stated. so.....
eg: hunting from 1000 to 1500RPM
or hunting from 500 to 700 rpm?

i pinch all hoses first.
if RPM drops the hose is cracked or the other end is leaking air.
every 50k miles?

http://www.fixkick.com/sensors/cleaning-egr-isc/double-trouble1w.JPG

does RPM go below 800 RPM HOT engine?
yes ./no
this a is key factor.

Feb 28, 2015 | 1995 Suzuki Sidekick

1 Answer

1993 geo tracker idle up and down


HOT ENGINE? (ill guess hot)
idle surges.(hunts) (very simple reasons or very hard to find.
the car has 2 engines. G16A and G16B
they work totally opposite, (8valve and 16v)
the vin number tells you the engine type ,digit 8 is engine code
6= G16B 16v
U= G16A 8v
i have factory book. its in chapter 0 these facts.
the cause of idle surge and hunt are:
1: ISC failures. the ISC can stick partially open and then hunts.
clean it and test it . see videos of how.
2: engine running so bad the ISC can nOT regulate idle speeds.

#2 is caused by up to 50 reasons.
8v , air leaks, cause racing idle and iSC goes nuts.
16v , all air leaks cause lean and if too lean the ISC goes nuts.

by nuts , i mean it hunts or gives up.

the list is endless, but the tests are basic,
i cant help you because no engine stated.

http://www.fixkick.com/IDLE-AIR/idle-index-home.html


ISC = IDLES SPEED CONTROLER (a system not just a PART)

Jul 08, 2014 | 1993 Geo Tracker

1 Answer

1998 suzuki swift idle problems 4 speed 1300cc


no engine type stated, there are 6 engines used.
but bad idle is caused by 2 things.
  • misfire.
  • or lean AFR, lean fuel mix.. causes HUNTING
the ECU can also cause the hunt if it can not hold hot idle to spec.
most cars is 800rpm.

Jun 26, 2014 | Suzuki Swift Cars & Trucks

1 Answer

Idle up down


hunting or surging ilde. name the 2 RPMS, low and high , is it hot or cold engine this issue.? 400rpm or 1000 or 2000 all are diff.causes.
no year, stated. so cant help.
but ill answer in the generic,
1: the ECU (got a carb,? )
the ecu controls idle speed at all times.
if not , there is a problem (you)
A: air leaks in the induction will make motor race at some point the ECU/ISC loses control. and hunts. trying hard to correct it.
b: egr stuck open idle too low, iSC cant correct it,, bad EGR.
c: engine EFI running way too leak starving for fuel so it hunts for 2 reasons < ISC hunting, and lean does that.
lean is gross power loss and opening throttle bogs the engine.
so is double bad. ISC makes it worse,

all this breaks down to 2 reasons.
1: ISC bad. in some way (gummed up. or restricted inside)
2: bad fueling or air leaks. vacuum leaks.

try answers , the hot cold question and the 2 speeds, of the hunt.
lowest rpm and highest of the hunted range of RPM.

Nov 23, 2013 | Honda Civic Cars & Trucks

1 Answer

I wish to adjust the idle tickover speed a wee bit on a 2007 Ford Transit 2.2 Duratorq engine. It is currenlty ticking over at approx 800 rpm and is hunting at this rev. If I could raise it a wee as I do...


First ensure that the throttle interior is really clean, a surface layer of grime can upset the ECU's ability to meter and govern the air entering the engine. If the throttle body interior is found to be really oily and dirty check on the idle air control valve and make sure that it too is cleaned up. Next put the ignition switch in position 2 (on, but no start) and depress the accelerator fully and release. If there is an issue with the throttle position sensor this procedure can help the ECU relocate the throttle plate position. Start the engine and if it is still hunting locate the air mass meter (AMM) on the air ducting immediately next to the air filter and disconnect the electrical connection. Does this remove the hunting aspect?... the rev speed might change but for the moment concentrate on the evenness of the tick-over. If the idle is even when the AMM is disconnected but hunts when connected then look at replacing your AMM. Try spraying the AMM with no residue electrical cleaning spray to see if this improves matters.

Dec 02, 2010 | Ford Transit Connect Cars & Trucks

1 Answer

Suzuki Swift 1988 GTi engine hunting problem


check for a vaccum hose disconnected,check air filter casing secure

Jul 14, 2009 | 1989 Suzuki Swift

4 Answers

At idle the engine revs up and down


engine lite on? would ck to make sure there is plenty of coolant in system. low coolant may cause idle hunting. also could have a vacuum leak or air intake restriction. ck air filter

Nov 30, 2008 | 2000 Volvo V70

1 Answer

Idling speed vw golf petrol 1.4 2001


That sounds about right, the idle speed may not even be manually settable due to emissions regulations.
I know for sure you can't adjust the idle mixture anymore; that is determined by sensors and the on-board computer.
There may still be adjustments on some cars but they are often sealed with lead to avoid tinkering.

Aug 07, 2008 | 2001 Volkswagen Golf

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