Question about Ford F-150
First thing off if it only dies in reverse then you have a trani problem, not an engine problem...
so I would start with the cheapest solution, the home made trani flush...
Drop the trani pan and filter and replace the filter. then take the trani cooler line loose at teh cooler ( the one that flows out of the trani ) and put it into a large bucket. put 8 qt of trani fluid in the trani and start the engine you should have trani fluid flowing into your bucket at this point pour another 6 qt of fluid into the trani while its running. once you get all the fluid into the trani shut the engine down. reconnect the line and top off your trani fluid. this might free up your the check ball and should make it run better in rev.
Posted on May 12, 2010
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Posted on Jan 02, 2017
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Here are some of the causes of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue 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.
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