idles in park at 800 idles in gear low

1997 FORD THUNDERBIRD
130,000 MILES
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RIC006
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  • 4 POSTS
the car idles great in park or neutral but when in gear drops down to about 300 and sometimes as low as 10 not kidding 10 and it dont sound like its running but most times its at around 500 rpms checked spark plugs, wire coils fuel injectors changed o2 sensors replaced valve cover gaskets, checked for a vacum leak i have an error code P0420 now due to this issue but i dont want to put my new cats on untill prob is fixed
May 23, 2012 at 2:55 AM
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RASMATAZ
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Check the exhaust if its clogged and also clean the idle air control valve and MAF sensor-
May 23, 2012 at 3:08 AM
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RIC006
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Yeah i checked the exhuast at a muffler shop says its still clear and i cleaned the IAC last week and sprayed card cleaner in the mas
May 23, 2012 at 3:39 AM
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RASMATAZ
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You don't use no carb cleaner on the MAF sensor-you probably ruined it-use an electronic cleaner such as the CRC
May 23, 2012 at 3:52 AM
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RIC006
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its three wires to clean and been told by many mechanics to use it i will retract my donation thanks for your time
May 23, 2012 at 3:55 AM
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THIS IS MIKE
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We have refunded your donation. We are sorry we were not able to help you this time. Good luck with your repair.
May 23, 2012 at 6:49 AM