Why is my Toyota running rough?
Reasons your vehicle might be rough idling Bad spark plugs: A problem with your vehicle’s spark plugs or spark plug wires could be the reason behind your rough idling. The spark plug does two things: ignite the combustion chamber’s fuel mixture and remove excess heat from the combustion chamber.
What causes rough idle at cold start?
One of the most common causes of rough idle on a cold engine is a faulty ECT sensor. This sensor signals the car’s computer when the engine’s coolant is cold or hot, so the computer delivers more or less fuel to the engine. An ECT sensor with an electrical open circuit will affect engine idle when cold.
What’s the temperature of a Toyota truck when it’s cold?
^Ya, when I start my truck dead cold it ildes at about 1600-1700 and then drops to about 900 when fully warm. It runs rough only at idle when warm. When warm, driving normally or just blipping the throttle by hand, it runs just fine.
What makes a Toyota truck run rough after warm up?
After warm-up, however, it runs rough and barely idles, sometimes stalling. If I let the truck sit and cool off, it runs well again until it warms up. Plugs (gapped), distributor cap, rotor, exhaust manifold gasket are all new.
Are there any problems with the Toyota Tacoma?
This model year was known for having annoying transmission problems. The transmission feels slow to switch gears and even slips after the truck has been taking in the reflash of the ECM. Some drivers ran into erratic shifting issues too.
What’s the difference between warm and cold Toyota Prius?
It runs rough only at idle when warm. When warm, driving normally or just blipping the throttle by hand, it runs just fine. When warm, it idles roughly and stalls. When cold it idles fine and runs fine. When I block the EGR at the intake plenum (with a piece of shim stock), it idles fine when warm.