What makes a car run OK at idle?
Lack of power as you accelerate the vehicle down the road. Car (or truck or mini-van) seems to run ok above 30 miles and hour but once you come to an idle, the engine barely stays running and/or idles rough. Once you take off again, it runs OK. What Tools Do I Need?
Why is the exhaust gas recirculation valve on at idle?
The Exhaust Gas Recirculation Valve is a vital emission control device. It allows the exhaust gas to enter into the intake manifold, with the sole purpose of reducing emissions from the motor. However, this EGR valve isn’t supposed to operate during idle, at wide open throttle or before the engine is warmed up.
What happens to the engine when left in idling position?
When the engine is left in idling position, it maintains a steady but low rate of revolution approximately 1,000 RPM. The RPM needle stays constant, and this indicates that the vehicle’s engine is receiving the correct amount of air and fuel.
Is the EGR valve supposed to run during idle?
However, this EGR valve isn’t supposed to operate during idle, at wide open throttle or before the engine is warmed up. If it runs at any of these times, the performance of the engine is affected.
What are the symptoms of a bad idle control valve?
$0.00 1 Irregular idle speed One of the most common symptoms commonly associated with a problematic idle air control valve is irregular idle speed. 2 Check Engine Light comes on Another symptom of a potential issue with the idle control valve is an illuminated Check Engine Light. 3 Engine stalling
What causes the idle speed to go up or down?
The idle air control valve is programmed to regulate and maintain the engine idle speed at a constant rate. If the valve fails or has any issues it can cause the idle speed to be thrown off. This may result in an unusually high or low idle speed, or in some cases a surging idle speed that repeatedly climbs and falls. 2. Check Engine Light comes on
How much does an idle control valve cost?
$92.73 – $160.32. Price range for all vehicles. Average rating from 17,525 customers who received a Change Oil and Filter. The idle control valve, also commonly referred to as the idle air control valve, is an engine management component that is found in one form or another on the majority of road going vehicles.
What causes chain rattle on a Ford 4.6?
The first symptom of 4.6 timing chain problems is chain rattle on cold starts. This is because as the guides wear down they allow too much slack in the timing chain. In turn, the chain will making rattling sounds that are usually most noticeable on a cold engine. If not fixed in time the Ford 4.6 timing chain guides may completely fail.
Why does my car sputter and hesitate at idle?
I thought maybe it was that Sock thing clogged thats attached to the pump causing a problem in a specific operation range. -I should note that the car is running extremely lean regardless of the pressure of fuel going in according to my wideband. It is reading 18-20 AFR at idle .
What should the AFR reading be at idle?
It is reading 18-20 AFR at idle . Should be 14.7 like it was before, I haven’t changed any tuning with HP Tuners and I know that my injector constant is correct. -Now my idle started going crazy so my first assumption is a faulty Throttle Position Sensor]