Re: 1992 Toyota Celica ST w/1.6L engine
"George Spafford" <firstname.lastname@example.org> wrote in message
> I could really use some help. I lost power and the car wouldn't
> start. I checked the computer and the only error code was the vacuum
> sensor. If I unplug the vacuum sensor on the firewall, the engine
> will at least start but not rev past 1,200 RPM. I now have a new $360
> dollar Toyota sensor and the car still will not run.
It is never a good idea to replace a part without first checking the part to
see if it is functioning properly or not.
Also, when a computer identifies a particular component, the correct
procedure is to check to see if the component is functioning properly, and
if it is, check the circuit for that component and other systems and
components that are related to the identified component.
It is very unlikely that a bad vacuum sensor will prevent a car from
> During my testing with the sensor unplugged, I then noticed the
> exhaust down pipe was glowing red and there was air blowing out of the
> vacuum lines vs. sucking air in.
> I then thought that maybe I had blockage in my exhaust. I removed the
> exhaust at the Catalytic converter and it seems to run easier but I
> still have air coming out of the vacuum lines (the line going to the
> pressure sensor & at the valve cover). Before taking the exhaust off,
> I could only get the RPM up to 1,000 without the sensor. With the
> exhaust off, I can get the RPM up to 1,200.
> At this point, if I plug in the vacuum sensor wire harness then the
> car stalls very quickly. I have the exhaust off the car right now and
> the brand new sensor installed.
> What should I be looking at? I am confused. Do I have a sticking or
> bent valve? I don't hear any funny noises and the car seems to turn
> over easily. I put a wrench on the crank and can readily turn it.[/color]
I think you still have a blockage in the exhaust. When you say that you
removed the exhaust at the catalytic converter, is that before or after the
converter? In other words, is the catalytic converter still on the car?
What happens if you remove the converter?[color=blue]
> I have not pulled the valve cover off yet.[/color]
(correct punctuation to reply)