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, I have a 94 toyota corolla that has a couple of things that are puzzling me recently..The first is that in the morning, when I start the vehicle and let it warm up initially, it will warm up fine, heat blowing into cabin wery well, but, when I start driving, the temp. gauge starts to go down and the air from the vents starts to get cooler...not cold mind you, but not as warm as if is sitting still...when i pull into the lot at work and sit, the temp goes back up to normal, and the heat increases coming from the vents........the second question is, the vehicle has a habit of not shifting into overdrive until it has reached a specific temp..or that is what it appears...in the summer, I would have to drive it for roughly 10 minutes on the highway befor it would shift into overdrive..Now that it is much cooler outside, it takes about 30-35 minutes of driving before it will shift into overdrive.....any suggestions?...what should I do ?......thanks....PETE
Answer Check the engine cooling fan, when the engine is cold it should be off, turn the key on and see if the cooling fan runs all the time. The transmission is designed to not shift into O/D until the engine is warmed up, taking to long to warm up could be due to a stuck open thermostat or a cooling fan that stays on all the time.
