Poor acceleration
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Joined: Aug 2006
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Poor acceleration
Can anyone help with this. I have a 1999 F150 4.6L recently I installed a K & N air filter shortly after that I have noticed I don't have as much acceleration power as I did before when I floor it from a dead stop. I don't know if it could be the new air filter or something else. The other thing that it is doing is at idle while in gear it drops about 100rpm and then goes back to normal rpm and repeats that cycle. The rpm issue is intermitent. Any sugestions.
Post Fiend
Joined: Mar 2003
Posts: 14,413
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From: Sarnia, Ontario, CANADA!
Hi and welcome to FTE! Your question would be better asked in the 4.6L Engine forum. This one is for introducing yourself. Enjoy the site. 
Read this for some info that will help you around the site: https://www.ford-trucks.com/forums/s...92&postcount=2
-Matt
Read this for some info that will help you around the site: https://www.ford-trucks.com/forums/s...92&postcount=2
-Matt
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