How long should the choke stay on?
How long should the choke stay on?
At 5°-10°C (41°-50°F), the choke plate should be fully open in about ten minutes. Check for bent choke linkage and a defective thermostat cap. And ensure the fast idle cam (screw) is properly set. So checked it out today and the choke works perfectly well, so now I’m suspecting and idle circuit running to rich.
What is a divorced choke?
Divorced choke means about the same as a bad marriage, its seperated. The choke coil is not mounted on the carb, its on the intake. Your 70 probably has a divorced choke.
What does it mean when your car stalls at idle?
If the Engine Stalls at Idle Unless You Press the Accelerator IV. If the Engine Starts When Cold but Stops When Warm V. If the Engine Stalls Intermittently I. If Your Engine Stops Immediately After it Starts Your engine may stop as soon as you let the key return from the Start to the Run position.
How long does it take for an engine to idle from a cold start?
It controls the idle no matter what state the engine is in, hot or cold. Second, when the engine is cold, the computer is in open loop and goes to closed loop once the engine has met all of its presets. Can take up to two minutes on most modern fuel injected vehicles.
What causes a choke to stay on fast idle too long?
Stays on fast idle too long: The choke spring tension is too tight, the heat source is not being supplied or is blocked, or the fast-idle cam is gummed up, bent or has another problem that does not allow it to drop.
How to troubleshoot an automotive engine high idle?
The troubleshooting procedure for high and low idle conditions are similar, which are included in the following: Step 1 – If the check engine or service engine light soon has illuminated retrieving the diagnostic trouble codes could lead you in the right direction of what the problem is, or is related too.
Stays on fast idle too long: The choke spring tension is too tight, the heat source is not being supplied or is blocked, or the fast-idle cam is gummed up, bent or has another problem that does not allow it to drop.
What causes car to run with choke on but dies when off?
You won’t find that spraying around the intake manifold. If it’s a modern vehicle look for vacuum manifolds (some are on the firewall) that may have had rubber caps on non used ports. A backfire can blow one off and it won’t idle for shit until it is closed off again. Brake boosters and the hoses that lead to them are often culprits.
What causes a car to stall at idle?
The most likely cause of this kind of stalling would be, a fuel pump that is not spinning fast enough; or is intermittently cutting out. If the vehicle is more than seven or eight years old the fuel pump would certainly be suspect. But, as with the idle speed control circuit; don’t replace anything until you’ve run some diagnostic tests.
What happens to choke spring when engine is shut off?
As the engine warms up, the spring tension is reduced until the butterfly is completely open and has no impact on the signal the carburetor venturi (booster) is exposed to. When a hot engine is shut off and starts to cool, the tension on the choke spring increases in lockstep with the drop in temperature.
