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Unread 07-15-2005, 11:56 AM   #1
nitecop
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1999 TJ Wrangler 
 
Join Date: Jun 2005
Location: midwest
Posts: 1,771
Intermittent part throttle surge? TPS?
I have a 99TJ w/4.0L 5-speed. The problem is it has a part throttle surge. about 1200 rpm to 2200rpm it has a intermittent surge. It is not bad just enough to notice.
replaced plugs, cap and rotor helped some like %30 gone. It is not even like it is lean but I am open to investagate all suggestions. Vehicle has 84k miles.
Think it needs wires? it is slightly less noticable on low humiditiy days. I do not think it is a cylinder cutting out no backfiring all plugs looked good. Map sensor doin its own thing maybe? Wot it runs decent. This thing has me puzzeled.
Jim

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Unread 07-15-2005, 01:10 PM   #2
Alec
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Join Date: Dec 2004
Location: Suburban Sprawl, PENNA
Posts: 685
No codes? Replace the TPS and see how it goes.
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Unread 07-15-2005, 01:34 PM   #3
Dogman
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1997 TJ Wrangler 
 
Join Date: Jun 2004
Location: Boise, Idaho
Posts: 5,088
I would pull the codes. Last time I had something like that, it was the MAP and the TPS were not in synch.
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