1995 Ford Escort 95 Escort engine surges at idle

1995 FORD ESCORT
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ROY2801
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Engine Performance problem
1995 Ford Escort 4 cyl Front Wheel Drive Manual
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my escort with 170,000 plus miles has started reving up to 2to 4,000 RPM while idling or between gears when clutch is engaged I replaced idle control valve and worn or broken vacuum hoses but that didnt help so i took it to dealer where they replaced a broken sensor (coolant temp I think) which seemed to fix it for 2 weeks then it started same stuff again.It seems like if I shut it off and restart 3 or 4 times it will idle normally and run fine until I have to turn it offagain.Also cooling fan only seems to work if I keep the A/C on.I also used a sensor tester/code scanner and it showed no trouble codes,I'm stumped and could use some help.
Jun 14, 2008 at 4:50 PM
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BMRFIXIT
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Check coolant level
check coolant sensor and its wiring connector

Jun 15, 2008 at 7:47 AM