Question about 1994 Ford Escort

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It idles fine when cold but when it starts to get warm it idles rough, you can feel it going up and down not badly but i can feel it and see it on the rev counter

I have an escort 1.6i 1994 it idles fine when cold but when it starts to get warm it idles rough, you can feel it going up and down not badly but i can feel it and see it on the rev counter

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  • Anonymous Mar 27, 2014

    starts fine then revs up down while in idle

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  • Ford Master
  • 2,007 Answers

Faulty idle air control valve. You could try and clean it with some carb cleaner, or replace it.

Posted on Jun 03, 2009

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chk/test yr plugs also. If it starts to break down then chk soliniod & coil as u may be getting the start of a bigger problem. yr symptoms r showing signs of an elecrical problem. rough warm ups r the signs. c/be choke sensor also causing roughness..

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check that the EGR valve is not sticking or has a vacuum leak. This valve will not operate until the engine is warm.

check also the engine coolant temp sensor (ECT). This sensor tells the engine computer that the engine has warmed up, so if it is faulty, it could be sending wrong information to the computer. If the sensor is disconnected, wires to it broken, or faulty in full cold mode, it will tell the computer that the engine is very cold, like -40F. The computer will schedule fuel for cold conditions. This is usually way too much fuel for a warm engine and it will rich misfire, idle rough, and be difficult to start warm.

The ECT has two wires going to it and is dedicated to sending information to the engine computer. It has nothing to do with your dash gauge that shows coolant temp. That sender has only one wire and is dedicated to the coolant temp gauge.

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