Check your trans fluid immediately , then get a clutch
SOURCE: rough idle
when was the last time you had a good tuneup sparkplugs,wires if needed and fuel filter and replace the drive belt and also make sure all of the vaccum lines are on and the one behind the throttle body
SOURCE: ROugh idle
there are 2 things that usually cause this, one is a dirty intake idle control valve and the other is hard engine mounts, I would say that both most likely apply to your car. try cleaning the intake with the following procedure from Ford.
Here is the most common cause of surges and stalls and low idle rough idle, it is the idle speed control air-bypass valve and throttle valve (IAC for short), they get full of gunk over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.
SOURCE: 1995 F-250 runs rough
Check exhaust compression. Remove the O2 sensors before the cataylatic converters and see if it improves. If it does then the cats are cloged and need to be replaced.
SOURCE: 2000 f-250 running rough, overdrive light flashing
check for a loose ground coming off your computer...i had the same problem and ford had to change the computer...well it turned out to be a loose ground..
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