It idles fine on cold start up but after about 5 miles of driving is starts idleing rough and the engine light comes on. I have checked all fluids, and checked for any loose wiring and have added fuel line cleaner (to dry water) to the gas. It only has 88,000 miles on it.
SOURCE: 2005 Ford Escape Rough Idle - engine code state lean fuel mixture
I recommend getting a repair manual from an auto store for your vehicle. They run $15 to $20. It will tell you exactly how to do everything you asked and also give you the values that should be expected. Hope this helps.
SOURCE: 1988 Ford Crown Vic Strange Idle (Getting Worse)
i am trying to install an aftermarket temperature guage with capillary tube into my 1988 crown victoria ltd 5.0 efi. where does the capillary tube mount?
SOURCE: 2001 Mazda B2500 Rough Idle
Check for Vacuum hose(s) off at the black intake tube and at the vacuum tee on the left side rear on the upper intake manifold.
SOURCE: engine runs rough at idle and bucks at highway
I had a similar problem in a 1994 Taurus, and after spending nearly 300$ on ignition parts, it turns out the problem was a bad spark plug wire that cost me 8.88$ to replace.
Testimonial: "n.o. 1 spark plug wire it is. thank you"
Here are the most common causes of idle surge, rough idle esp when cold and 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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P0304 which is cylinder 4 mis-fire. I tested the coil on that cylinder and it is ok hoping it is just trash in the injector.
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