car holds rev when in neutral.

habiv

Member
Oct 28, 2004
125
1
16
Hi guys, my father has a 98 4.6 with an automatic transmission. Ever since the car was new when we rev it up in neutral the engine holds the rev and they slowly comes down. It's not a tight rev up and rev down like my 5.0. Anybody know what this is? I heard somewhere that it has something to do with the pollution control. If so, is there any trick to get rid of this problem? Thanks.
 
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