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66StangGuy · 05-19-2002, 02:20 AM

i had a similar problem before because of a bad pcv valve. If you have a tach watch what the rpm does as it passes 2000. on mine after you past 2000 the rpm would drop back to 1800 and i would have to press the gas more to get it up to highter rpm. This was because of the bad pcv valve. it threw off the fuel air mix. so my suggestion is to check for vaccume leaks. espcially in the pcv valve. good luck

05-19-2002, 02:20 AM	#3
66StangGuy Registered Member Join Date: Feb 2002 Location: Diamond Bar Posts: 258	i had a similar problem before because of a bad pcv valve. If you have a tach watch what the rpm does as it passes 2000. on mine after you past 2000 the rpm would drop back to 1800 and i would have to press the gas more to get it up to highter rpm. This was because of the bad pcv valve. it threw off the fuel air mix. so my suggestion is to check for vaccume leaks. espcially in the pcv valve. good luck __________________ 66 mustang-292-Holley 4160-World Castings Windsor Sr.-Hooker super comp headers-MSD box & Coil.3.55 gears. B&M Z-Gate-Black leather racing seats with 4pt harnes.