1993 Toyota Camry 4 Cylinder 16 Valve Does not start
Today I was at the intersection and my car just died. I had some people check out the engine and they stated that my ECU is not working. Question where is this located and how do I know this needs to be replaced. They tested the volts it runs 12 volts and gas is not getting to the jets?? Thanks for your time.
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Your car probably requires a comprehensive engine tune up. During engine tune up mostly three areas are addressed: 1. Restoring the cylinder compression. This system requires the adjustment of valve tappet clearance at operating temperature. Inlet=0.25mm-0.30mm, Exhaust=0.25mm-0.35mm) 2. Servicing the air and fuel system. Servicing and inspecting the throttle body, ISC (Idle speed control valve), element air cleaner and MAF ( mass air flow sensor) Fuel pump pressure approx. 38psi - 44psi. 3. Servicing the ignition system. Inspecting and/or replacing/adjusting the spark plugs gaps(0.9mm-1.1mm), igniters (visual inspection) Regards, Shadab Lodhi
There is no idle adjustment screw on this engine, which is normal for EFI engines. The idle is controlled by the car's computer. It does this by controlling the Idle Air Control - IAC - valve, which should be checked in your case. See here p271
There is a throttle stop screw, not the same, on the throttle body, which you may be thinking of, p263. This does not directly control idle speed.
Also the A/C, if any, can affect the idle if the A/C idle-up switch has failed. If testing this switch, do so when the engine is hot, as that is when they fail. See p295
This could be caused by a malfunctioning aftermarket alarm system, check to see if there is a small LED on a bracket on the lower left of the dash, if it has this I would recommend having the system removed at an automotive alram shop.