Question about 1997 Toyota T100
Yes me too l suject you to check for vacuum leak
Posted on Apr 07, 2015
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
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
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
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
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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