Sr bog/jerks like crazy under boost or about 4K RPM

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thang nguyen
Posts: 215
Joined: Tue Aug 22, 2006 5:23 pm
Car: 1989 Nissan 240SX Fastback

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I have no clue why my motor jerks like crazy around 4K rpm in every gear. I have a feeling that it might be fuel issues but i have no clue how to fix it or if that is even the case. And sometimes when I go over a sudden bump the car bogs like it's dry on fuel, and I have a full tank.

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IanS
Posts: 9758
Joined: Thu Dec 23, 2004 3:07 pm
Car: 2002 Subaru WRX, 2010 Subaru Forester XT, 2004 Infiniti G35 Coupe.
Location: Esko, MN
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check your grounds, sounds like somthing is loose.
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jasonkg
Posts: 113
Joined: Wed Jul 13, 2005 11:54 am
Car: 1991 240sx
Location: Melbourne, Fl

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Check your coilpacks. I had a similiar problem and I had a bad coilpack.
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thang nguyen
Posts: 215
Joined: Tue Aug 22, 2006 5:23 pm
Car: 1989 Nissan 240SX Fastback

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how do i know if they are bad or not?
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otterman
Posts: 3380
Joined: Tue Feb 21, 2006 5:43 pm

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Also check your TPS
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smokey240sx
Posts: 587
Joined: Fri Apr 30, 2004 1:19 pm

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vacuum leak! check all hose for cracks and dry rot.
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