94 toyota 22re idles up and down - Toyota Nation Forum : Toyota Car and Truck Forums
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#1 Old 10-24-2005, 10:18 AM
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USA 94 toyota 22re idles up and down

i have a 94 toyota 4x4 with 22re engine...when i come to a stop and its just sitting..it idles up and then idles back down and keeps doin it till i take off. any ideas on what it might be???

thanks
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#2 Old 10-24-2005, 10:57 AM
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you might want to check your idle adjust screw, and your a/c adjust screw..

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#3 Old 10-24-2005, 01:51 PM
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no a/c....could be tps??

i have already messed with the idle screw..my truck is not equipped with ac either...could it possibly be the throttle position sensor? i wanna go the cheapest route possible. i just had a long block put in my truck...they said that it was cuz the knock sensor was bad, but i dont see how that could be it...any ideas???
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#4 Old 10-24-2005, 03:11 PM
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i think your problem is because your idle is set too high. your fine untill it warms up and the thermostat opens up and the idle is suppose to drop down. when you hit the brakes it cuts fuel so the engine kinda helps slow you down and you save fuel .when the idle creeps up with the brakes applied once it gets to a certain point the fuel cut kicks in and it bogs down and it keeps cycling. if you can get it to idle down lower it will fix the problem. get our timing set to 5deg btdc with te1 and e1 jumped and set your idle from there to about 750 rpm when its at operating temperature. hint is have a budy hit the brakes while you turn the idle down to where it stops. could be a vacuum leak or something like that causing it to race. most likely its you air mixture screw or the timing advanced too much. if you adjusted the idle on the actual throttle linkage on the idle screw you need to adjust the tps sensor to the correct specs. but i dont think this is your main problem untill you get the idle down. do you have a tach?

Last edited by subliminaltrips; 10-24-2005 at 03:13 PM.
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#5 Old 10-24-2005, 04:13 PM
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It could be one of these:
vacuum leaks
Leaking EGR valve or plugged PCV valve
Air filter clogged
Leaking head gasket
Timing chain or belt worn
Camshaft lobes worn
Valve clearance out of adjustment.
Valves burnt or otherwise leaking
Ignition timing out of adjustment
Ignition system not working properly
Thermostatic air cleaner not operating properly
Dirty or clogged injectors
Idle speed out of adjustment
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#6 Old 10-24-2005, 07:44 PM
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About half of the ECU codes stored on the first & second generation EFI Toyotas don't show a constant blinking check engine light therefore you must pull the ECU codes to see if a fault is registered.

To pull the ECU codes:

All 1980-1995 and including 1995 EFI equipped vehicle allow you to find engine and related faults by pulling the ECU (computer) codes without the need for a handheld OBDII diagnosis scanner,the sites listed below have the fault codes needed to pull the codes and the instructions on how to do it:

http://autorepair.about.com/library/...bl-dtcs-36.htm
http://autorepair.about.com/library/...bl-dtcs-53.htm
http://autorepair.about.com/library/...bl-dtcs-71.htm
http://autorepair.about.com/library/...bl-dtcs-90.htm
http://www.off-road.com/toyota/tech/codes/index.html
http://lcengineering.com/TechNotes/TechNote12.htm
http://lcengineering.com/TechNotes/TechNote13.htm
http://www.geocities.com/MotorCity/P...ct/Engine.html
http://www.mad-mechanic.com/toyota/t...tml#obtaincode
http://www.freewebs.com/th3duke/22RE-ECU.mht
http://www.troublecodes.net/Toyota/
http://members.igateway.net/~pscott/enginecodes.html
http://www.autobook.co.kr/data_links...uble_codes.htm
http://www.autoshop101.com/forms/h27.pdf
http://www.showmesome.info/hilux/inf...E/Page0096.htm
http://www.efisakh.narod.ru/at_toyota.htm
http://www.usatransdoctor.com/foreigntoyota.htm

Pulling the ECU codes is the first thing I do to diagnosis a problem thereafter I reset the ECU to see if the same problems show up and if so I then take voltage measurements both with the engine running and not and compare with the factory service manual,I also close the ignition switch after a cold engine and also after a warm engine and compare them with the factory service manual.This technique will completely isolate your problem without having to do trial and error and it is the technique I use when repairing tv's,vcr's,home/car audio.

The oxygen sensor is replaced for free in the USA only when the vehicle reaches it's first 80 000 miles regardless of the age & number of owners as stated in the factory owner's manual in the maintenance section,some Toyota dealerships are reluctant to replace it for free if that happens contact the Toyota regional head office for your region where they will give your local dealership 48 hours to comply.
On average the oxygen sensors should be replaced every 6 years or 100 000 miles or so which ever comes first as stated in the owner's manual,warranty booklet and factory service manual.

Symptoms of a bad o2 sensor are poor gas mileage,hesistation in acceleration,worse emmissions,and in severe cases after the stat opens the engine can no longer maintain stable 750 rpm (with manual 5 spd tranny) idle and the engine begins to stall.
The 02 sensor is designed to function once the vehicle has warmed up which is about after 10 minutes where the thermostat begins to open at 190 or 195 degrees Ferenheit depending on thermostat then the vehicles ECU system enters what they call a "closed loop system" then the exhaust manifold's temperature reaches 400 degree Ferenheit (I think)that's where the sensor starts to do it's job which is usually when the thermostat first opens up then the oxygen sensor senses the ratio of air to fuel and sends a signal back to the ECU then ECU compensates by increasing or decrease the open time for the fuel injectors to pump fuel.So usually the problem of stalling shows up after about 10 minutes of driving or so.Many folks think that the o2 sensor is bad but an exhaust leak can cause excess oxygen to enter the exhaust system thereby fooling the sensor into thinking there is too much oxygen,there are other problems that could cause it to give false reading such as a vaccuum leak.

If you discover that the o2 sensor is bad and it is not under warranty then from my/others experience/research purchase an o2 sensor in the following order:

1)Toyota (NipponDenso now called Denso)
2)Denso aftermarket (Same as original but sold aftermarket)
3)NTK (oxygen sensor division of NGK)

Available at:

http://www.1sttoyotaparts.com/partscat.html (10% shipping by Fed Ex or free shipping with $100 & over speak to Roger at 1-888-271-3948
http://www.Toyotaparts4U.com
http://www.toyotaofplano.com
http://www.densoaftermarket.com
http://www.ngksparkplugs.com

before you replace the oxygen sensor soak the 14 mm brass nuts with any of these deep penetrating oils several times for several hours:

1)PB Blaster
2)Liquid Wrench
3)Kroil Oil
4)Aero Kroil & Sili Kroil
5)Toyota Rust Penetrant or High Performance Penetrating lube
6)Rust Check

the first ones being the best,also if you decide you need new ones here is the Toyota part for the exhaust manifold (brass)nuts # 90179-10175 (14 mm socket)

Oh yeah,I bought a NTK (NGK) oxygen sensor # 24105 for my 85 4-Runner and it came with a gasket and a genuine made in Japan black plastic tie wrap I don't know if the Toyota or Denso aftermarket ones come with a gasket but ask them before you buy them.

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E-mail:sidneybek@yahoo.com
Dartmouth,Nova Scotia
Canada
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#7 Old 10-26-2005, 11:01 AM
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Quote:
Originally Posted by 9toyota4
i have a 94 toyota 4x4 with 22re engine...when i come to a stop and its just sitting..it idles up and then idles back down and keeps doin it till i take off. any ideas on what it might be???

thanks
This happened to my '94 22re a while ago, exactly as you describe. Turns out that it was low on coolant, but not low enough to make the temp gauge go up. I know it sounds weird, but after messing with the idle for a while and not getting anywhere, I took it to a mechanic and that's all it was. Must have been messing with the coolant temp sensor or something. He added the coolant and it's been fine ever since.
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#8 Old 04-29-2010, 10:35 AM
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Did you ever figure out what caused the idle problems. I have the same issue with my 94 Pickup
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#9 Old 04-29-2010, 08:33 PM
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Quote:
Did you ever figure out what caused the idle problems. I have the same issue with my 94 Pickup
Umm, this post is from 2005.
But to answer your question, check to see if your idle speed is in spec. If it's too high adjust it.
Also check your coolant level.
They are the 2 main causes of "idle surge".

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#10 Old 04-30-2010, 08:54 AM
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It was the collant level. It wasn't even that low. Topped her off and no more surges! thanks
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#11 Old 02-19-2012, 01:42 AM
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how do you adjust the TPS?
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#12 Old 02-19-2012, 04:07 AM
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http://www.4crawler.com/4x4/CheapTricks/TPS/index.shtml

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