Question about 1998 Ford Escort
Subaru Impreza Outback Sport. At idle, every minute or two there's a miss. Under anything but gentle acceleration, it misses like crazy, jerking and stuttering.
Had spark plugs, wires, fuel filter replaced. Fuel additive didn't help.
Ignition coil looks good, no corrosion.
It's been doing this for maybe 500 miles. Sometimes seems to improve or even go away, always returns.
Subaru mechanic on phone said it could be a fuel-air mixture sensor that's off, suggests I bring it in to plug into their analyzer.
Any suggestions? Thanks!!
Hello, It could be related to your A/F ratio sensor, but it also could be a faulty (stuck open) EGR valve if your vehicle is equipped with one. Depending on the year of your vehicle you can disconnect the source vacuum line for your EGR valve and plug it off with a golf "T", small bolt, or any thing that will fit snug into the vacuum line. If it cures the problem, you'll have to replace the vacuum solenoid that supplies vacuum to the EGR valve. If nothing changes it could just mean that the valve is so carboned up that it can't close all the way. You can remove the valve to make sure that all of the passages are clear. If they are clear of carbon build up, I would then take it to a shop for more testing. You can find the location of you EGR valve in any repair manual. I hope this info helps...(subytech1)...
Posted on Aug 25, 2009
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Posted on Jan 02, 2017
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