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Engine choking how doi know if computer box is broken?

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When all diagnostics lead to the computer. Choking issues can be a lot things. plugged air filter cracked air intake hose from air cleaner to throttle body. jumped timing belt restricted exhaust.

Posted on Apr 19, 2014

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Posted on Jan 02, 2017

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Newer cars do not have carburetors. If your enigne has one, the "choke" plate is the topmost flapper-looking thing on the carburetor. Benath that is the throttle plate, which moves whent he acceprator pedal is pressed. The choke shoudlbe closed automatically when the engine is cold. If thengine is warm, the choke plate should be slightly closed. The engine design includes the necessary mechanism to operate the choke funtion automatically. If that has failed you can choose to repalce whatever is broken or cobble together a "throttle cable" to it so you can manually operate the choke function form the driver's seat. In the old days the cable would be secured to the dash justy above your left knee. Doubtful you will find such a "choike kit" in the autp parts stores these days sicne there are so few carburated engines around, but you should now have an idea as to what to do.

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My car runs very good until its warm up its dies


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2. EGR valve may need to be replaced.
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Please let me know if you need futher assistance.

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Will not start on hot day's in the sun.[engine cranks normal]


The normal reason why a hot engine doesn't start is the choke. Your fancy new range rover will have a computer controlled choke that will be activiated by a temperature sensor. maybe this has failed or is disconnected
In my ancient range rover I have a manual choke but essentially the same engine. I know that if the motor is hot I can't start it with the choke on.
The way the choke works is it restricts the airflow into the engine so that there is a richer fuel / air mixture which is needed for a cold start. If the engine is hot and the choke comes on the engiine floods with petrol and there isn't enough oxygen for it too ignite in the cylinders. To start a flooded engine you have to open the choke and crank the motor without pressing the accelerator. This pumps out the petrol vapour and eventually it will fire and start. If the computer thinks it is cold because of a disconnected or faulty sensor it will put on the choke whenever you try and start and the engine will flood.
I think a vapour lock is unlikely unless you driving in extremely hot weather (above 40 degrees celsius).

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