Question about 1997 Toyota T100

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I have a 1997 toyota t100 with a 3.4. It idles fine until it warms up. Then idles at 1500 rpms. Any answers? Thanks

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  • Toyota Master
  • 2,039 Answers

Yes me too l suject you to check for vacuum leak

Posted on Apr 07, 2015

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Check the ECT sensor engine coolant temp as it may be bad and causing the engine to idle high trying to cool down if it falsely reads too hot a temp. .

Posted on Jun 19, 2015

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  • Expert
  • 79 Answers

Check for vacuum leaks, if none found it could be a stuck idle air control valve.

Posted on Apr 07, 2015

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Posted on Jan 02, 2017

alicantecoli
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SOURCE: 98 chevy 1500 loses power

sounds like an ECU fault.one of the chips is breaking down when the units warms up

Posted on Nov 04, 2008

  • 2 Answers

SOURCE: 1991 Toyota 4x4 22re .On cold start the idle

put a jumper wire between the bottom two pins in the plug for the throttle position sensor, if it idles down you need to replace the idle throttle position sensor

Posted on Apr 09, 2009

  • 49 Answers

SOURCE: 1994 toyota pickup idling problems

Could be a throttle position sensor going bad or a loose or leaking vacumm line or loose or worn wiring harness. You had mentioned the engine starts heating up. Do you mean overheating or operating above normal temperature? Sounds like a vacumm issue with the fluctuating idle. Check for worn vacumm lines and check to see if the vacumm is functioning. Sometimes a simple vacumm line with a loose connection or a small hole in it can affect your idle. Old lines are easily replaceable and an inexpensive place to start, then try your egr valve, pcv valve, brake booster vacumm line, oxygen sensor could be worn and affecting the mapping of fuel and air on the computer. Usually the check engine light will come on in this case.

Posted on Apr 18, 2009

  • 1 Answer

SOURCE: 98 Ford Explorer erratic cold idle

98 ford explorer erratic idle from cold reves jump. ok when warm but still stalls at times.

Posted on Feb 06, 2010

  • 4793 Answers

SOURCE: 1990 Toyota Camry LE with the 3S-FE idle problem

the engine management system is trying to find correct idle speed/no fuel (when you take your foot of the gas above 850 rpm no fuel goes into the engine.help economy/egr system to burn off.try using a higher/lowe octane fuel to see if any change occurs.also try a gas treatment like unwins/redexe

Posted on Feb 11, 2010

Testimonial: "Hi I tried your suggestion on gas treatment and it seems to be working.I noticed in the actual owners manual it says to use 91 or higher octane gas."

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1 Answer

1997 acura cl 2.2 revs up to 1500 rpm and down to 1000 rpm just several seconds after start


Cars are design to run at a higher idle at start up to warm them up quick. There is a sensor that reads water temperature and tells your car's computer how fast to idle. Your RPMs seem slightly high but not out of the norm. Does idle ever drop to around 600/800 after about a minute? If not, your engine temperature sensor maybe defective.

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My 1997 Jimmy runs fine in idle when I take off the vechile is fine until it reaches 20 mph it won't accelerate and the rpms increase up to 3000 but no speed. What's wrong it's a 4 wheel d


Sounds like 2nd gear in the transmission is slipping. Cars usually shift at 15-20 mph from first to 2nd. First check the trans fluid.

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Check the water coolant thermostat. If it is stuck in the "open" position you are heating up all the water in the coolant system and this will take time. The thermostat keeps the water in the engine until warmed up to almost normal running temperature, only then does it allow the coolant to enter the radiator.

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Have a 1997 Dodge Ram 1500. Truck runs fine until it heats up and the termostat kicks in. It will not idle and the rpms go up and down between 300 and 1000 then stalls. When on the highway it runs fine...


likely your throttle position sensor or idle air control valve. Try disconnecting each one when the problem starts if it corrects you have found the culprit.

Nov 08, 2010 | 1997 Dodge Ram 1500 Club Cab

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Car wants to turn off


Hi,

Thanks for writing to Fixya.com.

I would check idle adjustment first. There are two idle controls on our cars, so it's not as straight forward as you'd think. There is the base idle (controlled by the screw) and the idle air control valve, controlled by the computer. This computer controlled value is used sparingly when needed. Mostly the car relies on the idle screw control. If this is set too low however, the computer will take over, and you'll think you have idle set correctly, until you let rpms drop from 2,000+ to idle, it will stall, or almost stall.

Adjust the idle screw up until idle raises to 1,000 rpms, then adjust it back down until you get to 850, but no more. If you adjust it more, the idle will stay at 850 because the computer controlled idle takes over. A lot of people (me included) will keep turning the screw all the way down, thinking everything is fine. Don't do it. Stop adjusting once you hit 850 rpms with a warm motor.

This is the easiest, quickest thing to check, so do it first before trying anything else.


Thanks for contacting Fixya and please accept the solution if it has helped you.

Jun 07, 2010 | 2006 Dodge Charger

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My toyota randomly will rev up the rpms to about


your idle position sensor could be bad. if it reads incorrectly, then it can randomly adjust to a higher idle like when you cold crank and let it warm up.

Mar 23, 2010 | 1994 Toyota Pickup

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Low oil pressure indicator at low rpms (idle) '97 olds V8


Thicker oil is all you need. 5w30 is too thin when it warms up and the sensor cant pick up the flow going past. 10w40 should stop all the issues

Jul 07, 2008 | 1997 Oldsmobile Aurora

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