240Z, 260Z, 280Z Performance / Technical Discussions related to performance motor enhancements, upgrades.

280Z shakes when the rpms are between 1300&1800 please help

Old May 28, 2009 | 09:48 PM
  #1  
ballizticbucket's Avatar
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280Z shakes when the rpms are between 1300&1800 please help

why would my 78 280Z shake when ever the rpms are between 1300 and 1800? also why would my rpms go up several hundred rpms when I pump the brakes? you can reply to tuffytime@msn.com thanx, Marc
Old May 28, 2009 | 10:17 PM
  #2  
NismoPick's Avatar
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Joined: Aug 2005
Posts: 20,639
From: Wild Wild West, UTAH!
Welcome to ZDriver!

Have you checked the basics?
-Have you checked the timing? What is it set to?
-Have you adjusted / calibrated the TPS?
-Have you checked the fuel pressure?
-Have you adjusted the AFM?
-Have you cleaned all sensor connections?
-Have you wiggled the ecu plug wires?
-Have you checked the spark plug tips to see if they are all the same? Wet? Dry? Color?
Old Jun 1, 2009 | 06:22 AM
  #3  
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Joined: Mar 2003
Posts: 1,699
From: dayton, nevada usa
You might have a leak in the hose from your intake manifold to the brake booster or a leak in the booster itself. Check all the vacuum hoses and the large intake hoses to the throttle body.
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