markmustangs

I just wanted to let you guys know that my car is finally FIXED. After several days of testing the VSV's, the vacuum system, and several other sensors, I decided to bring it to the local Toyota dealer. They quickly diagnosed the problem. The problem was that the timing belt was off a tooth. It only costed $140 for them to re-align the timing belt. It runs much better now, and it also shifts much smoother too.

Thanks for the pics blake. My car's setup is a little different then yours. It uses a thermostatic VSV instead of an electrical for the EGR. It is mounted on the lower intake and it screws directly into the coolant passage. My other two VSV's are similiar to yours. It checked my VSV for proper operation and it seems to be working correctly. The Vacuum port was closed when then engine was cold, and as it warmed up, the valve opened. I put a can of fuel injector cleaner in the tank and sprayed some carb cleaner directly into the intake to clean some of the carbon build up, and it accelerated a little better this morning. However, it is still very very slow and it still shifts kind of hard. I will check the other VSV's today for proper operation.

My car idles pretty smoothly but it does shift kind of rough. Your vacuum switches are under the engine cover?? My haynes manual shows the VSV's located on the lower intake manifold. They are right near the throttle body and I didnt need to take the engine cover off to access them. There are 2 of them right next to each other. It says the one on the right is for the EGR and the one on the left is for the EVAP. they are both pretty similiar, and they both have 2 vacuum ports on them. Is this what your part looks like?

My engine light has never come on. Blake, what vacuum switching valve did you have replaced? I looked at a repair manual, and they show 2 for my car. One is for the EGR system, and the other valve is for the EVAP system. Do you know what the part looks like? Also what year is your car, because 95 and up has a different system.

This is definelty not normal. It is extremly dangerous and I almost got into an accident because of it. Even if I let it warm up for a good 3 or 4 minutes, it will still not accelerate . It wont accelerate at all no matter how far down I push the gas pedal.

Has anyone had a problem with their car not wanting to accelerate when the engine is cold? My 93 ES300 is extremely slow first thing in the morning. It doesnt want to accelerate, it just creeps along at about 5 mph. As the engine warms up it starts to get better. It accelerates fine when the engine is warm. It also does not upshift very smoothly. The 1-2 upshift is most noticeable. Does anyone know what could be causing this?? The slow acceleration is my main concern.

My car also will not accelerate at all. It starts fine and idles fine, but if I put it in gear and try to accelerate, it will just slowly roll at about 5 mph. Pressing down on the accelerator does not help to make it accelerate any faster. After about 5 minutes it will start to get better. Even if I let it warm up for about 2 or 3 minutes before taking off, it will still accelerate extremely slow.

Can you give me some more info on your cold start problem. I have a 93 ES300 and it is very sluggish and very slow first thing in the morning. Once it warms up, it runs fine. Did you have the same problem?? If So, What was the fix?? Thanks

I have a 93 lexus es300 and my car is very sluggish in the morning. It starts up fine, but when I put it in drive and give it gas it is extremely slow. It feels as if I dont even have my foot on the gas when the gas pedal is right to the floor. As it warms up it gradually gets better. My temp gause on the dash seems to work fine. Does anyone have any ideas what could be causing this??? It runs fine when it is warmed up.