Question about 1994 Toyota Corolla
My car loses power when it warms up and i have replaced tps and plugs and the wires?
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Posted on Jan 02, 2017
SOURCE: tps sensor
There are 2 screws that hold the TPS on to the side of the throttle body. Before you take the old TPS off, note where the TPS is located regarding the adjustment slots. Remove the 2 screws, and remove the old TPS, install the new one, and try to achieve the SAME adjustment. If you get the adjustment wrong, the engine will idle up & down. If it does, move the new TPS slightly until the idle smooths out.
Posted on Oct 11, 2008
Sounds like the fuel pressure regulator. Could also be that the timing jumped. But I'm leaning towards the pressure regulator. Hope that I could help. Best wishes.
Posted on Jan 17, 2009
one of you air line pipes could have collapsed or split which will cause a problem with idling and performance and it will give no smoke signs
Posted on Feb 13, 2010
Have you looked at your idle air control valve
What is it? This is an electrically driven valve that allows additional
control over the throttle at idle
Where is it located? The IAC is located on or adjacent to
the throttle body and consists of a small device held on by two bolts with an
How does it work? When the throttle is closed the throttle plate closes off any air from the intake manifold. In order to stop the engine from stalling due to lack of air the IAC opens a small valve allowing air to pass from the air ducting to the intake manifold. Often the IAC components consist of an air inlet port in the inside wall of the throttle body, immediately in front of the throttle plate, with a similar exit port behind the throttle plate. Connecting the two ports is a motor driven valve. When the valve is opened air effectively by-passes the closed throttle plate to maintain the engine at idle. The IAC also augments the throttle when additional power demands are put on the engine such as steering.
Symptoms of faulty IAC
How to check? Physically remove the IAC but keep the electrical connection to it. Temporarily block off the now open ports on the throttle, turn the engine on and examine the IAC valve action in response to additional loads (power steering inputs etc). The valve should open and close according to demand.
How to fix? If the motor of the IAC has failed then replace the IAC. If the valve is gummed closed by baked oil and carbon then clean it thoroughly with carburetor choke cleaner spray and a cloth. Similarly if the entry and exit ports on the throttle body to the IAC look blocked again clean them out thoroughly.
Posted on Jun 03, 2010
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