AboutTed Ritter Expertise I have more than 26 years experience as toyota technician, I will be able to answer most questions related to the toyota product line up to the present year models, I specialize in difficult to diagnose problems but when posting a question please keep in mind that some situations require the used of special test equipment and diagnostic procedures especially as the newer models become more technologically advanced, so without actually having the car on hand I may only be able to try to steer you in the right direction and in some cases may have to refer you to the toyota dealer but at least you will know what you may be dealing with. Please don't hesitate to ask any questions, I will have an answer for you in most cases. When posting a question keep in mind that I reside in the US, although I get questions from all over the world I may not have an answer for models that are not sold in the US, I will do a reasonable search to try to match your model to the US model,please refrain from asking about diesel powered vehicles, I have no information for them. In most cases I will not answer questions about major modifications of OEM components, engine swapping or aftermarket products,please post a question not a statement, please provide enough basic information such as year, model, what engine and if anything has already been done to fix the problem, the more information I get the more I can help without having to ask you more questions.
Experience Toyota technician since 1979,expert in electrical systems,OBD systems,engine repair, driveability problems,EFI systems,ASE certified,Toyota master technician. Certified Hybrid Vehicle technician.
Education/Credentials Toyota master technician, ASE certified in eight catagories, Hybrid vehicle certified.
Question Hi Ted,
I have a 1991 corolla wagon (4x4) that has developed a severe idle problem. When the engine is running the idle revs up and then reverts back to normal. This happens continuously but is worse when the engine is hot. When I remove the wires to the vaccum sensor the idle remains high and when I disconnect the tube coming from the vaccum sensor the idle drops really low and the engine runs really rough but is still driveable. I took it into ultratune but I don't think they had a clue. They turned the idle down as far as it would go, gave a few things a clean up but didn't fix anything (a big waste of money). They suggested the thermostat was stuck open and there was a problem with my cooling system system leading to a problem with the auto-choke. I change the thermostat and gave the cooling system a top notch flush all to no avail. Anyway, if you could shed some light or offer a few possiblilities that would be awesome. Thanks Billy
Answer Does the check engine light ever come on? Is it on at this time? If the check engine light does not turn on while driving check for a vacuum or air intake leak, check the large intake hoses from the air filter, they have a tendency to crack, check all other vacuum hoses, especially the alrger ones for any that may be cracked or have become disconnected.
