Question about 1993 Toyota Camry V6

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1998 camry 5sfe engine, surging at idle

5sfe engine surging at idle and running rough. Currently running at 1000 rpm. Spark plugs are new and air cleaner ok, have cleaned and tested idle speed control valve and tested all ok. Any help would be much appreciated.

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  • cabaluchi25 May 11, 2010

    it might be your distributer cap

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Check for air leaks in the vacuum pipes in and around the inlet manifold, they have a habit if going brittle and splitting.
Another possibility is the temp sender , if the ecu thinks the engine is too cold it will compensate causing the engine to " hunt". This can be something as simple as a worn radiator cap seal letting air into the cooling system and tricking the sensor.
Hope this helps, Marshall

Posted on Apr 29, 2010

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What I read here sounds good but I would also consider the mass airflow sensor. These are a heated wire that is cooled by passing air, over time, they break. Disconnect the mass airflow sensor and see if the engine performance changes, if not that is the likely culprit.

Posted on Jun 03, 2016

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My 92 camry did the same thing. It ended up being the egr system was cloged. They suggest cleaning the filter. I just deleted the whole system and plated the hole on the manifold. But I ran boost so no need for egr.

Posted on Jun 03, 2016

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Fuel Injectors...... just fixed this on my a couple days ago, runs like a champ

Posted on Nov 08, 2010

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1 Answer

Increase then decrease idle when engine is cold especially


cold engine idle surge. (problem)
RPM range of surge not stated
300-700 or 800 to 1500? (range is critical to diagnosis)

bad fuel
running summer fuel in winter (running old fuel?)
needs a tune up bad, see the list in the operator guide.
idle speed controller,sticking or EGR valve same. (clean them)
location not stated, so cant guess about local air temps.?
no other symptoms, lack of engine power? etc?
was it ok last week, or better, when was the last time it was OK?
1week, 1year?
surge , causes, on a tuned engine might be:
1: too lean. so lean the ISC can not control idle. rpm low, stalling
2: too rich, flooding, stalling, spark plugs foul (look at them)
3: weak compression in 1 or more cylinders.
4: bad spark.
5: air leaks, in the plenum causing , ISC to lose control.
why high RPM?

especially?
well that means it fails hot too.
and there is a simple tests. for hot surge.
is engine fully hot? 180F and holds solid there?
say rpm is about 800
and you turn on head lights, heater fan and (not AC) and defrost.
the RPM must hold or the ISC is failing.
ISC -= idle speed controls. (all EFI has this function)

Oct 28, 2013 | 1996 Honda Prelude

1 Answer

The problem: 2001 mitsubishi galant es will not continue to run first start up in the morning


For idle issue,click the help links provided below :---

Bad miss at idle? http://technoanswers.blogspot.com/2012/01/bad-miss-at-idle.html---------- Engine stumbles coming off idle when warm?

http://repairhelpcenter.blogspot.com/2012/01/engine-stumbles-coming-off-idle-when.html

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While stop engine idles like cylinder missing?

http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html

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Idle flair is noticed on car? Rough idle? car will not idle? Erratic idle speed?

http://technoanswers.blogspot.in/2012/02/idle-flair-is-noticed-on-car-rough-idle.html

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High rpm in neutral? Inconsistant high RPM in neutral? http://technoanswers.blogspot.in/2012/02/high-rpm-in-neutral-inconsistant-high.html

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Erratic idle on car?

http://schematicsdiagram.blogspot.com/2011/12/erratic-idle-on-car.html

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Low idle when cold out side?

http://repairhelpcenter.blogspot.com/2011/12/low-idle-when-cold-out-side.html

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Idle Air Control (IAC) Valve Replacing?

http://schematicsdiagram.blogspot.com/2011/12/gmc-idle-air-control-iac-valve.html

-----------
intermittent engine failure while idle?

http://repairhelpcenter.blogspot.com/2011/10/1996-camry-intermittent-engine-failure.html

------------
Engine quits at idle?

http://repairhelpcenter.blogspot.com/2011/10/engine-quits-at-idle.html

-------------
Car overheats and Air blows hot at idle? http://howtobyme.blogspot.com/2011/11/car-overheats-and-air-blows-hot-at-idle.html

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Car not starting or turning over indicates towards multiple possibilities. It can be issue with battery or weak battery. But if battery checks out ok, then it can be starter issue or faulty alternator or problem with low fuel pressure or no spark at spark plugs due to dirty spark plugs or faulty ignition coil or injectors getting cracked or dirty and needs to be cleaned.


To confirm the problem, the basic troubleshooting is required.


Click this link below and follow the troubleshooting:------

http://technoanswers.blogspot.in/2012/02/car-starting-issues.html

---------

This will help.

Thanks.

Feb 26, 2012 | 2001 Mitsubishi Galant

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A few possibilities are worn engine mounts (the rubber mounts that take away engine movement and vibration).....or rough engine idle ( maybe poor compression in one or more cylinders or other factors)....or maybe the engine idle speed is too low (typically 700 to 1000 rpm is normal depending on if AC is running which takes up more rpm) Alex

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