Is the Mercury idle spark timing too high?
Btw ive seen people use 35$ timing lights to tune 7 second cars just fine. You need to be doing this under a load. Btw ive seen people use 35$ timing lights to tune 7 second cars just fine. Click to expand… I was doing it with the LU submerged in a tank just as the manual says.
When does a car idle high and accelerate on its own?
It happens when no gears are engaged, acceleration pedal is not pressed, and brakes are activated. Idling is needed in many situations, such as when you wait for the traffic signal to turn green or at any point when you don’t feel the need to turn off the engine. Sometimes idling seems to increase the RPM high until the engine is fully warmed up.
What’s the normal idle RPM for a car?
What you want to do is find out where the car should be idling when it is completely warmed up. These days the normal range tends to be anywhere between about 650-900 rpm. 1000 is on the high side, and 1700 is certainly on the high side for cold start up. So if there is a problem it isn’t that car idles higher at start up – its supposed to.
What to do if your car is idling too fast?
A throttle body cleaning is likely to cure the high idle speed as well. There are many possibilities when your engine is idling too fast. Here are some common ones to help guide you towards the root of the problem.
Why does my car idle at a higher RPM than normal?
Updated January 19, 2019. If your car seems to be revved up to a higher-than-normal RPM while idling, it’s not necessarily a problem. If this problem happens while the engine is cold, it may be part of the engine’s design.
Why is my IAC engine idling so high?
If the IAC motor’s vacuum port is leaking, this can be another cause of high engine idling. The leak could be sourced at the seal, or more often, in one of the attached hoses. An overheating engine will often idle higher than normal, so be sure to check your engine temperature gauge.
What to do when your car is at high idle?
While observing the valve with a flashlight, turn the key to the “ON” position, (DO NOT START ENGINE.) the valve should move slightly. Step 3 – Engine vacuum is a sealed system and must hold a specific amount to maintain proper idle conditions, inspect the engine vacuum hoses and intake gaskets.
What’s the difference between high idle and low idle?
Step by step automotive repair guide on how to troubleshoot and fix an engine that is idling high (fast) or low (slow). (Note: The engine idle speed is controlled by the computer and is NOT adjustable.)